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3,503.) Yelena's question is
no comments
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Was posted on - Wednesday, December 04, 2002 at 13:43:07 (EST)
3,499.) Lyndal's question is
Why does a metallic cake pan get cold when sprayed with cooking spray. Cooking spray ingredients - canola oil and lecithin. Propellant - hydrocarbon
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Was posted on - Thursday, November 28, 2002 at 22:48:19 (EST)
3,496.) Lyndal Bowron's question is
I cannot comment as yet as I have not had any service to respond to. I entered this site via another and so cannot comment on the site set up.
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Was posted on - Thursday, November 28, 2002 at 22:42:57 (EST)
3,486.) Kathryn's question is
When they use fractional distillation to separate crude oil, what kinds of wastes are produced
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Was posted on - Saturday, November 23, 2002 at 17:01:41 (EST)
3,485.) Kathryn's question is
This is a cool site.
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Was posted on - Saturday, November 23, 2002 at 17:00:11 (EST)
3,481.) Craig's question is
Wicked
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Was posted on - Thursday, November 21, 2002 at 08:33:03 (EST)
3,477.) Anna's question is
how do you give out when doin word equation the name of the product after giving out an metal
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Was posted on - Tuesday, November 19, 2002 at 14:59:48 (EST)
3,475.) Sarah's question is
umm, i need my question answered
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Was posted on - Tuesday, November 19, 2002 at 10:19:49 (EST)
3,473.) Hailey's question is
Is cynide fatal if swallowed accidently?
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Was posted on - Monday, November 18, 2002 at 15:15:04 (EST)
3,471.) Hailey's question is
When can I get my answer.
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Was posted on - Monday, November 18, 2002 at 15:12:12 (EST)
3,468.) Angie's question is
na
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Was posted on - Sunday, November 17, 2002 at 22:43:47 (EST)
3,465.) peisi's question is
it's really informative and useful. keep it up!
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Was posted on - Sunday, November 17, 2002 at 11:30:01 (EST)
3,460.) briony's question is
When heptane is burned completely in oxygen the energy released is 4800kj/mol the activation energy is 350kj/mol. How would you draw an energy profile for this and what would be the balanced equation and energy released from this complete combustion?
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Was posted on - Friday, November 15, 2002 at 21:33:00 (EST)
3,458.) bub's question is
if you had 10g of carbon dioxide and wanted to fix that to glucose how much energy would you need to do so?
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Was posted on - Friday, November 15, 2002 at 18:15:55 (EST)
3,456.) Bri's question is
i'll let you know when i get back to you
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Was posted on - Friday, November 15, 2002 at 18:12:53 (EST)
3,454.) Veranica's question is
How do you get from grams to atoms, "passing" through moles, in an equation?
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Was posted on - Friday, November 15, 2002 at 14:34:24 (EST)
3,445.) mhazzy's question is
no comment
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Was posted on - Sunday, November 10, 2002 at 02:10:04 (EST)
3,443.) Mike Last's question is
What are the bond angles of acetaminophen?
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Was posted on - Saturday, November 09, 2002 at 18:57:52 (EST)
3,432.) Andrea's question is
What are the latin name for the elements?
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Was posted on - Friday, November 01, 2002 at 12:46:48 (EST)
3,426.) tasha's question is
i like this ideal
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Was posted on - Saturday, October 26, 2002 at 21:34:34 (EDT)
3,424.) Stephanie's question is
Nice site
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Was posted on - Thursday, October 24, 2002 at 20:35:33 (EDT)
3,422.) bradely's question is
how can i split sault up into its two elements
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Was posted on - Wednesday, October 23, 2002 at 20:56:11 (EDT)
3,420.) Bradely's question is
i hope i get the answer im looking for
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Was posted on - Wednesday, October 23, 2002 at 20:50:54 (EDT)
3,418.) tia's question is
How many moles are in a can soda.
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Was posted on - Tuesday, October 22, 2002 at 23:00:42 (EDT)
3,414.) pat's question is
chemistry is hard
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Was posted on - Monday, October 21, 2002 at 16:02:26 (EDT)
3,411.) Kelli Samuel's question is
I need info on balancing formulas
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Was posted on - Friday, October 18, 2002 at 15:30:54 (EDT)
3,407.) mark's question is
ARE ALL FOUR HYDROGEN ATOOMS IN C3H4 ARE IN THE SAME PLANE?IF NOT, WHAWT IS THEIER SPATIAL RELATIONSHIP?
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Was posted on - Friday, October 18, 2002 at 12:54:27 (EDT)
3,400.) Noor's question is
i would like to know which chemical/substances are soluble and insoluble.. thank u :)
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Was posted on - Monday, October 14, 2002 at 02:30:01 (EDT)
3,398.) Becky 's question is
is it possible for an SN1 and SN2 reaction to occur simultaneously?
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Was posted on - Sunday, October 13, 2002 at 23:24:40 (EDT)
3,396.) Ashley's question is
What household item contains sodium bi-carbonate?
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Was posted on - Sunday, October 13, 2002 at 20:01:42 (EDT)
3,393.) Gemma Bate's question is
Name three types of rock that undergo chemical weathering
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Was posted on - Sunday, October 13, 2002 at 13:21:55 (EDT)
3,392.) Gemma Bate's question is
hi
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Was posted on - Sunday, October 13, 2002 at 13:20:23 (EDT)
3,386.) rushank baweja's question is
this is a brilliant concept!
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Was posted on - Friday, October 11, 2002 at 07:37:55 (EDT)
3,384.) M. GHAFOUR's question is
PLEASE HELP FIND AN ANSWER FOR THIS QUESTION
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Was posted on - Thursday, October 10, 2002 at 21:07:50 (EDT)
3,381.) AJ's question is
On the book The Wonderful Flight To The Mushroom Planet, I found the word tetramethylbenzacarbonethylene, What does it means?
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Was posted on - Wednesday, October 09, 2002 at 20:19:11 (EDT)
3,379.) Marisol's question is
The hydrogen atom emission spectrum contains a line at wave length 121.6 nm which transition gives rise to this line. I need to know how to work this problem
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Was posted on - Wednesday, October 09, 2002 at 20:10:25 (EDT)
3,378.) Marisol's question is
good
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Was posted on - Wednesday, October 09, 2002 at 20:10:03 (EDT)
3,375.) Michelle Mulvey's question is
how do you set up a specific gravity prblem?
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Was posted on - Tuesday, October 08, 2002 at 17:48:20 (EDT)
3,373.) bernice's question is
can you answer my question please? thank you
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Was posted on - Monday, October 07, 2002 at 22:10:39 (EDT)
3,368.) jillie's question is
help me please i need it
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Was posted on - Saturday, October 05, 2002 at 15:01:58 (EDT)
3,367.) jillie's question is
thanks for your help
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Was posted on - Saturday, October 05, 2002 at 15:00:27 (EDT)
3,364.) Thin's question is
hlep me ASAP!
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Was posted on - Friday, October 04, 2002 at 14:36:59 (EDT)
3,358.) Jonathan's question is
Names of gases that combine to form solids
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Was posted on - Sunday, September 29, 2002 at 21:33:39 (EDT)
3,353.) Irma LOu Yano 's question is
I leaqrn many things from here.
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Was posted on - Friday, September 27, 2002 at 04:16:31 (EDT)
3,351.) Irma Lou Yano's question is
It help me in my assignments.
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Was posted on - Friday, September 27, 2002 at 04:08:34 (EDT)
3,349.) Irma Luo Yano's question is
This really give easy and good time to study my lessons.
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Was posted on - Friday, September 27, 2002 at 03:56:21 (EDT)
3,345.) Katie Wilson's question is
§~!!!!!!HELP!!!!!!~§
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Was posted on - Wednesday, September 25, 2002 at 09:43:59 (EDT)
3,344.) Katie Wilson's question is
~!!!!!!HELP!!!!!!~§
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Was posted on - Wednesday, September 25, 2002 at 09:42:10 (EDT)
3,339.) nida 's question is
what is carbon mono oxide and what are its side affect?
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Was posted on - Sunday, September 22, 2002 at 22:43:25 (EDT)
3,338.) nida 's question is
good
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Was posted on - Sunday, September 22, 2002 at 22:41:38 (EDT)
3,334.) tamara's question is
i ned help
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Was posted on - Thursday, September 19, 2002 at 23:57:15 (EDT)
3,332.) Will's question is
In an SN1 reaction, is BR a better leaving group than Cl and if so why/why not?
In an SN2 reaction which would be more favorable (react faster) 2-chlorobutane or 2-bromobutane
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Was posted on - Thursday, September 19, 2002 at 08:43:45 (EDT)
3,329.) Anthony Daniels's question is
My question is, is it possible to seperate the salt compound of solidum and cloride and if so can you explain or tell me some liteuretary that you got your answer form.
Thank You Very Much.
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Was posted on - Wednesday, September 18, 2002 at 15:58:33 (EDT)
3,323.) Cassandra's question is
This is a great site and very helpful towards research
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Was posted on - Wednesday, September 11, 2002 at 22:09:51 (EDT)
3,320.) Meagan's question is
What's the actual difference between the units used to express the densities of gases and those used to express the densities of solids or liquids?
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Was posted on - Tuesday, September 10, 2002 at 21:44:55 (EDT)
3,318.) Leah 's question is
How do I determine relative and absolute error when calculating density?
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Was posted on - Saturday, September 07, 2002 at 18:21:39 (EDT)
3,316.) jessica's question is
uhm....ok whatever just help me please i need to go to college
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Was posted on - Thursday, September 05, 2002 at 21:07:52 (EDT)
3,312.) Ian Anderson's question is
Excellent Web Page
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Was posted on - Tuesday, September 03, 2002 at 11:36:27 (EDT)
3,310.) Megan's question is
I need help with finding what is an atom and what is a molecule...please help me...
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Was posted on - Monday, September 02, 2002 at 21:48:55 (EDT)
3,305.) Shaq's question is
very helpful web site ta muchly
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Was posted on - Tuesday, August 27, 2002 at 19:22:37 (EDT)
3,303.) Emily's question is
This is a very convenient and helpful site.
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Was posted on - Tuesday, August 27, 2002 at 17:23:38 (EDT)
3,298.) mARLON FRAUSTO's question is
Where can I find info from the development of the table of elements
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Was posted on - Wednesday, August 21, 2002 at 22:06:47 (EDT)
3,296.) marlon frausto's question is
COOL
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Was posted on - Wednesday, August 21, 2002 at 22:03:43 (EDT)
3,294.) luis 's question is
why is a variable placed in an experament?
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Was posted on - Wednesday, August 21, 2002 at 17:14:45 (EDT)
3,293.) luis 's question is
physical science
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Was posted on - Wednesday, August 21, 2002 at 17:13:38 (EDT)
3,292.) luis 's question is
physical science
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Was posted on - Wednesday, August 21, 2002 at 17:13:37 (EDT)
3,289.) dawn's question is
Is bromoform miscible with water?? with cyclhexane??
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Was posted on - Monday, August 12, 2002 at 17:05:08 (EDT)
3,287.) sarah's question is
Is this a reaction I should be worried about?
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Was posted on - Saturday, August 10, 2002 at 20:03:53 (EDT)
3,284.) JO's question is
Can anyone tell me what the compound CH2O is? Thanks.
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Was posted on - Tuesday, July 30, 2002 at 13:37:40 (EDT)
3,282.) Jo's question is
Cool Site
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Was posted on - Tuesday, July 30, 2002 at 13:35:38 (EDT)
3,280.) shauna's question is
this is an awesome site and it offers a lot of info! thanks heaps!
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Was posted on - Wednesday, July 24, 2002 at 03:55:53 (EDT)
3,274.) William Lee 's question is
Thanks for reading and helping out with my problem. And please forgive me for my terrible english. I don't learn chemistry in english in school.
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Was posted on - Friday, July 19, 2002 at 04:26:54 (EDT)
3,272.) Henry Capasso's question is
From which end of a carbon chain do I begin counting in order to put the correct number on an NH2 (amine).
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Was posted on - Thursday, July 18, 2002 at 09:35:15 (EDT)
3,271.) Henry Capasso's question is
Thank you for this web site. I am a 1st year chem. student studying towards my Masters in Nutrition.
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Was posted on - Thursday, July 18, 2002 at 09:34:05 (EDT)
3,268.) Ezonarere's question is
explain the history of carbon.
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Was posted on - Saturday, July 06, 2002 at 15:54:19 (EDT)
3,267.) Ezonarere's question is
explain the history of carbon.
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Was posted on - Saturday, July 06, 2002 at 15:25:51 (EDT)
3,265.) Maddy's question is
I need help with precipitates... adding, subtracting... i don't know!! Help Me
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Was posted on - Wednesday, July 03, 2002 at 06:45:54 (EDT)
3,261.) daphnee deyanez's question is
differentiate, with examples, between ores, minerals and metals
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Was posted on - Monday, June 10, 2002 at 05:23:05 (EDT)
3,255.) Elizabeth Ridings's question is
Great!!
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Was posted on - Monday, June 03, 2002 at 17:07:00 (EDT)
3,251.) Daniel Ferrari's question is
this is a great site!
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Was posted on - Saturday, June 01, 2002 at 23:10:44 (EDT)
3,246.) Katie Niven 's question is
ow do you determine the mass of a piece of magnesium with out using a balance to wiegh it/
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Was posted on - Wednesday, May 29, 2002 at 09:59:47 (EDT)
3,244.) Katie 's question is
This site is very helpful
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Was posted on - Wednesday, May 29, 2002 at 09:57:49 (EDT)
3,239.) Cecilia's question is
Why the nonmetal has low ionization as go down the group?
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Was posted on - Friday, May 24, 2002 at 23:12:27 (EDT)
3,236.) Emily 's question is
I think this website is very helpful..
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Was posted on - Friday, May 24, 2002 at 15:29:01 (EDT)
3,229.) Jenevieve Caballero's question is
None at all. It was great having you guys help me through my homework.
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Was posted on - Tuesday, May 21, 2002 at 04:31:37 (EDT)
3,225.) Liz's question is
needs more info.
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Was posted on - Thursday, May 16, 2002 at 01:31:42 (EDT)
3,222.) Laura Tanner's question is
hi
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Was posted on - Wednesday, May 15, 2002 at 19:35:19 (EDT)
3,219.) Mamie Dupre''s question is
How would i solve a problem like if a mole of dollars is divided into 6 billion people what would my share be?
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Was posted on - Sunday, May 12, 2002 at 22:19:21 (EDT)
3,215.) kayte's question is
I need some help with an assignment I'm doing in chemistry
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Was posted on - Sunday, May 12, 2002 at 05:28:53 (EDT)
3,211.) Connie's question is
When was chemistry called alchemy?
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Was posted on - Saturday, May 11, 2002 at 22:08:07 (EDT)
3,209.) Michelle's question is
hi, I've got an assignment about the history of chemistry. Please help and answer my question.
Thank you
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Was posted on - Saturday, May 11, 2002 at 22:05:57 (EDT)
3,203.) Jeff's question is
What is a reason for a less than 100% yield in a reaction?
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Was posted on - Wednesday, May 08, 2002 at 22:00:08 (EDT)
3,200.) Eddie Fausett's question is
None at this time.
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Was posted on - Sunday, May 05, 2002 at 16:48:20 (EDT)
3,196.) angela's question is
I was given the following problems as a challenge. Can anyone tell me how to go about solving them?
1. You are given a 1.5mg sample of solid WO3 with the instruction that you are to remove ALL the oxygen via a reduction reaction leading to the formation of W and H2O. How many cubic centimeters of H2 at 28 degrees Celsius and 751 torr will you need?
2. A lecture hall contains 12 rows of seats. If a professor releases laughing gas (N2O) from the front of the room, and tear gas (C6H11OBr) simultaneously from the back of the room, in which row of seats are students apt to start laughing and crying simultaneously?
3. You are given the assignment of supplying an astronaut with oxygen gas for 24 hours from a solid source. He will need a lungful of O2 (350 cubic centimeters at a pressure of 150 torr and a temperature of 37 degrees Celsius) every six seconds. You decide to get the oxygen from cesium superoxide Cs2CO3, by the reaction ______CsO2 + ______CO2---->______Cs2CO3+_____O2. How many grams of CsO2 do you need to synthesize for the job?
If anyone could help, I'd be eternally grateful.
Thanks
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Was posted on - Tuesday, April 30, 2002 at 22:54:43 (EDT)
3,192.) manda's question is
I need to know what the tincture process is.
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Was posted on - Sunday, April 28, 2002 at 19:05:05 (EDT)
3,182.) Erica Griggs's question is
Physical Chemistry- Quantum Mechanics
I could really use some help on this one!
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Was posted on - Sunday, April 21, 2002 at 22:44:01 (EDT)
3,180.) Umer's question is
i like now about it.
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Was posted on - Friday, April 19, 2002 at 23:50:55 (EDT)
3,176.) torri's question is
this site is great
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Was posted on - Tuesday, April 16, 2002 at 19:43:53 (EDT)
3,173.) holly's question is
i am in desprate need of help and i need answers quickly. My family isnt very talented in the science department and our whole class is expected to have info on this by tomorrow or thursday so please do your best to help,
thanks alot
Holly xxx
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Was posted on - Tuesday, April 16, 2002 at 14:53:22 (EDT)
3,170.) Sophie's question is
none
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Was posted on - Monday, April 15, 2002 at 01:19:19 (EDT)
3,166.) Charles Brown's question is
n/a
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Was posted on - Saturday, April 13, 2002 at 00:55:42 (EDT)
3,164.) Charles Brown's question is
none
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Was posted on - Saturday, April 13, 2002 at 00:53:03 (EDT)
3,162.) Charles Brown's question is
none
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Was posted on - Saturday, April 13, 2002 at 00:50:37 (EDT)
3,160.) Charles Brown's question is
none
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Was posted on - Saturday, April 13, 2002 at 00:47:29 (EDT)
3,158.) Charles Brown's question is
none
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Was posted on - Saturday, April 13, 2002 at 00:44:27 (EDT)
3,155.) Charles Brown's question is
great help
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Was posted on - Saturday, April 13, 2002 at 00:39:28 (EDT)
3,153.) Charles Brown's question is
Why is NH3 soluble in wter but C6H6 is not
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Was posted on - Saturday, April 13, 2002 at 00:11:26 (EDT)
3,150.) Charles Brown's question is
Very help please try and keep the site going
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Was posted on - Saturday, April 13, 2002 at 00:05:33 (EDT)
3,147.) Karolina Salazar's question is
none
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Was posted on - Friday, April 12, 2002 at 13:56:07 (EDT)
3,144.) Ebony Evans's question is
This website is a God send because I sooo need help in chemistry!!!
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Was posted on - Thursday, April 11, 2002 at 09:08:26 (EDT)
3,141.) Nicholas Evans's question is
What is the difference between Concentrated and Dilute acids?
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Was posted on - Thursday, April 04, 2002 at 19:23:08 (EST)
3,139.) Nicholas Evans's question is
great site
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Was posted on - Thursday, April 04, 2002 at 19:20:53 (EST)
3,133.) Jeremy's question is
I really am good at algebra
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Was posted on - Thursday, March 28, 2002 at 14:36:48 (EST)
3,130.) christine's question is
what is the shape of CH3-? is that a trigonal planar?
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Was posted on - Thursday, March 28, 2002 at 03:20:14 (EST)
3,126.) David's question is
How better to learn than to have a question and answer site!
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Was posted on - Tuesday, March 26, 2002 at 09:28:57 (EST)
3,122.) Emily's question is
You really haven't helped me yet
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Was posted on - Monday, March 25, 2002 at 18:51:55 (EST)
3,118.) bridgid's question is
what are the connections between the periodic table, electron configuration and chemical behavior?
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Was posted on - Wednesday, March 20, 2002 at 21:23:24 (EST)
3,116.) bridgid's question is
I LOVE CHEMISTRY :-P
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Was posted on - Wednesday, March 20, 2002 at 21:15:44 (EST)
3,111.) Jessie's question is
i was wondering what is the chemistry involved in making a pregnacy test pos or negative?
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Was posted on - Wednesday, March 20, 2002 at 10:23:37 (EST)
3,108.) Nay's question is
Really informative
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Was posted on - Wednesday, March 20, 2002 at 08:08:14 (EST)
3,105.) Juliet's question is
How do you combine formula, such as Sodium and Nitrate?
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Was posted on - Tuesday, March 19, 2002 at 18:46:32 (EST)
3,100.) cossy's question is
What are the effects when Calcium Chloride and Sodium Hydroxide mix
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Was posted on - Monday, March 18, 2002 at 07:16:17 (EST)
3,098.) adrianna's question is
how does soap and cleaners work? I am in the fourth grade and am doing an experiment on which carpet cleaners work the best. I need to find some research to explain what makes them work. Please help!
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Was posted on - Sunday, March 17, 2002 at 17:25:18 (EST)
3,095.) Sam's question is
I have done an investigation on strong and weak dibasic and monobasic weak acids (that is four acids) and their reactions with magnesium.
I used ethanedioic acid as my weak dibasic acid (although I know it is better considered a medium acid). I found that the reaction with magnesium was second order with respect to the ethanedioic acid.
I have been trying to find a possible mechanism (not necessarily THE mechanism) for this reaction without any luck.
I would greatly appreciate any suggestions.
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Was posted on - Sunday, March 17, 2002 at 04:37:08 (EST)
3,092.) caitlan's question is
How many liters of ammonia gas can be formed from the reaction of 150. L of hydrogen gas, assuming that there is complete reaction of hydrogen with excess nitrogen gas, and that all measurements are made at the same temperature and pressure?
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Was posted on - Thursday, March 14, 2002 at 01:07:29 (EST)
3,090.) Caitlan 's question is
i need help
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Was posted on - Thursday, March 14, 2002 at 01:05:20 (EST)
3,087.) Emily's question is
Why does it take so long for a glass of water to evaporate,
while it takes a cloth absorbed in the same amount of water
a matter of hours to evaporate?
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Was posted on - Wednesday, March 13, 2002 at 12:18:50 (EST)
3,084.) Rhenda Furry 's question is
i need help in chemistry i don't understand it
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Was posted on - Tuesday, March 12, 2002 at 10:21:20 (EST)
3,080.) Joyce's question is
not bad
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Was posted on - Sunday, March 10, 2002 at 02:40:55 (EST)
3,077.) danielle's question is
hope this site works
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Was posted on - Thursday, March 07, 2002 at 19:18:42 (EST)
3,073.) es's question is
s
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Was posted on - Thursday, March 07, 2002 at 18:51:14 (EST)
3,070.) kylie gaunt's question is
this is a very helpful website!!!!!
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Was posted on - Wednesday, March 06, 2002 at 04:51:09 (EST)
3,068.) courtney's question is
In the electrolysis of water 75.0mL of oxygen gas are produced. How many mL of hydrogen gas are produced at STP? I really dont understand how to work the problem out Please Help!
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Was posted on - Tuesday, March 05, 2002 at 21:06:25 (EST)
3,066.) vanna's question is
Seawater is approximately 0.5M each in Na+ and Cl-. By evaporation NaCl can be precipitated from this solution. If 1.00x10^2 Liters of seawater is evaporated at what volume will the first solid appear? (Ksp=6.2)
Please help me solve this!!! send me an email with the set-up at rainbowxbrite81@aol.com if at all possible, thanks!!!
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Was posted on - Sunday, March 03, 2002 at 23:29:58 (EST)
3,064.) Vanna's question is
Seawater is approximately 0.5M each in Na+ and Cl-. By evaporation NaCl can be precipitated from this solution. If 1.00x10^2 Liters of seawater is evaporated at what volume will the first solid appear? (Ksp=6.2)
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3,058.) John Toms's question is
Please can anyone answer my question. I need it for a project and I cant find what it is.
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3,048.) jess oakley's question is
hope you can help
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3,045.) Drea's question is
What is the chemistry of stain removers (or more specifically carpet cleaners)? For example what are the reactions between the carpet cleaner and the dirt?
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3,044.) Drea's question is
Hopefully this website can help me out, I've been researching my question, but haven't been able to find much info...
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thank you
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hey to all the native peepz
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3,033.) Chelsea's question is
This site helps!
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3,031.) Kanwal 's question is
how many molecules are there in 96 grams of oxygen?
how am i suppose to know what type of formula i am using for this problem?
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Was posted on - Saturday, February 16, 2002 at 19:45:08 (EST)
3,029.) Kanwal's question is
how many molecules are there in 96 grams of oxygen?
how am i suppose to know what type of formula i am using for this problem?
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Was posted on - Saturday, February 16, 2002 at 19:42:33 (EST)
3,028.) sarah's question is
i would like to learn chemistry since im having problems learning it in school
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3,019.) Ramon Garcia 's question is
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3,013.) kt's question is
i am having trouble fiding a separation process for KNO3 , Fe, and CaCO3 to figure out the % composition can n e one help plzzz??
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3,006.) Kelz's question is
Please help me i need this class to graduste and our teacher gave us this 8 page paper to do today and we have a test on it tomorrow...
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2,983.) Hayley Gardiner's question is
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I NEED HELP WITH CHEMISTRY!!!!!!!!!!!!! AND ALG. 2
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I hope this works i really need help understanding this work.
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2,956.) Ryan's question is
how do you calculate and set up the equation for molarity?
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how do you determine the equilibrium constant if you are given the K a?
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2,913.) Natasha Garza's question is
I Need help finding the mass in grma if 4.5*10622 molecules of arsenic triflouride, AsF3. i have to use the Gram formula mass and Avogadro's number. Thanks
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2,906.) Tanya's question is
If you earn $200/week and work 50 weeks/yr, how long wil it take to get 1 mole of pennies?
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2,904.) Tanya's question is
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2,897.) Erica's question is
How many nanometers are in 1 meter?
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2,896.) Erica's question is
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2,892.) Jonathan's question is
If the density of a substance is 4.8g/cm3 at a particular temperature is 0.96g/cm3, what is the specific gravity of the substance at that temperature?
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none
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Thank you
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2,872.) Kelly Alvarez 's question is
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2,869.) Donald Doucette's question is
my question is an effort to save money because the product is so costly to get rid of.
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2,868.) Donald Doucette's question is
my question is an effort to save money because the product is so costly to get rid of.
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Was posted on - Friday, December 14, 2001 at 22:35:25 (EST)
2,865.) Nick Marshall's question is
If a compound's molecular formula mass is less than it's empirical formula mass is it possible to identify the compoun's molecular formula if you know the empirical formula?
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2,862.) Nick Marshall's question is
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2,852.) Annabelle Goode's question is
Help!!
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2,847.) amanda's question is
What's the net energy released by burning a mole of acetylene?
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Answer me!
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2,841.) Unaiza's question is
Hi,
Would u plz tell me that how much of calcium sulfate(plaster of paris) is produced anually n how much does it cost?
Thanx!
Bye.
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Was posted on - Sunday, December 09, 2001 at 06:58:08 (EST)
2,838.) molly's question is
what effects heating curves? what effects the heating curve of vanilla extract?
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2,836.) molly's question is
good stuff
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2,833.) Jay's question is
A solution whose pH=10 has a hydrogen ion concentration of
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2,832.) Jay's question is
Thanks
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2,830.) Tiffany's question is
before looking at equations, determine the number of atoms of each kind in each of the following:
CaCo3=____ Ca,____ C,____O
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2,828.) kate's question is
this is a concept i am having trouble understanding:)
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2,825.) JazzMan268's question is
i was wondering if this chemical reaction is correct? I am trying to find the theoretical and percent yields. for a Lab that I did. but first i need to find the right equation.
K + Al + 2(SO4) + 12H2O ----> KAl(SO4)2*12H2O
This is suppose to be for potasium aluminum sulfate dodecahydrate "alum", (solution). So is the H2O actually part of the reaction or is it just there showing that it is in solution? thanks.
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Was posted on - Thursday, December 06, 2001 at 19:20:14 (EST)
2,823.) JazzMan268's question is
In AP Chemistry and not understanding as much as i did in Chem. I.
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thanks
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2,802.) SShah's question is
PLEASE HELP ME BALANCE THIS EQUATION : CuSO4 + KI forms CuI + KI3 + K2SO4
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2,798.) Josh 's question is
I am working on a lab report about determining the ratio of zinc to iron atoms in a piece of galvanized iron and I don't understand how to set up the problem? PLEASE HELP...THANK YOU!!!
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Was posted on - Wednesday, December 05, 2001 at 18:19:38 (EST)
2,791.) Sydney Doss's question is
What do sodium metasilicate, 2 butoxyethanol, and sodium hydroxide do seperately and combined?
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2,788.) Jaymee Nguyen's question is
Please help
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2,775.) Jay's question is
Kinetics Theories?
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this site helped a lot.
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2,762.) CARLOS AVILA's question is
balance the equation below
__K+__MgBr--->__KBr+__Mg
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2,754.) Allison Bonner's question is
How do you change grams/liter into moles/liter
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I need help with my Chemistry homework
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this is cool
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2,742.) dave's question is
One bottle contains 40% bleach solution- another bottle contains
a 20% solution of bleach. In ounces, how much from each bottle
should be mixed to obtain a 3rd solution of 30%?
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Was posted on - Monday, November 19, 2001 at 19:50:52 (EST)
2,741.) dave's question is
One bottle contains 40% bleach solution- another bottle contains
a 20% solution of bleach. In ounces, how much from each bottle
should be mixed to obtain a 3rd solution of 30%?
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Was posted on - Monday, November 19, 2001 at 19:49:40 (EST)
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I need serious help with my chemistry class. I hope this can help.
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I have a science research paper due. Its supposed to be about how the brain gets distracted. Like how loud noises can effect studing or test taking. I was hoping for some research items like some sites or books or people I could interview. Thanks!!!
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2,725.) Andy's question is
I dun have one yet=)
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2,712.) Hot Girl's question is
What is the chemical reaction for bromiation of triphenylmethane using NBS with triphenylmethylbromide as the end product
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Acetaminophen
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2,699.) Justinne M. Young's question is
Can you give me some trivia questions about matter?
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Not answering my questions fast
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I think that a chemical change occured
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i think this is a really good site
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How does biological washing powder work excatly?
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2,680.) Christina's question is
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2,668.) TEDD WHITNEY's question is
HOW DO YOU FIND OUT HOW MANY MOLES OF CARBON ARE IN 1.50 GRAMS OF PROPANOL CH3CH2CH2OH??????
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2,659.) mesha anglin's question is
the textbook i own is made by Merrill.
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2,656.) Ryan Gannon's question is
what if the law of definite proportions
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2,655.) Ryan Gannon's question is
i need help
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I really hope you know the answer to this.
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2,646.) Rae Lynn Rodrigue's question is
I'm in Pre-AP chemistry, which isn't that hard except for some days
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2,640.) kat's question is
Ca + O2 = CaO2
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2,637.) Tiffybug's question is
I'm doing a massive project: a mohamma-jamma flow chart on General Chemistry. My main source of reference is the ninth edition Zumdahl chem books. I'm thinking of centering my flow chart around the basic info about the atom. Any help (especially in the math department) would be greatly appreciated. Thanx! :) God bless :)
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2,634.) Janice 's question is
A very helpful web for study.
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2,632.) monique's question is
thank you
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2,628.) Dawn's question is
Yup
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none
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none
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2,620.) rosa's question is
the balance for: P4 + Cl 2 @ PCl 3
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can you assist me in chemistry?
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I want to know the answer to my question, please
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How do you do this problem O(2-)? because I don't understand
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need help for a term paper
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2,601.) john danquah's question is
describe political problems for which the knowledge of chemistry will be healthy.
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2,599.) Courtney's question is
Thank you. :)
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Really do need to know this
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what are componds and elements in foods?
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2,587.) Trevell 's question is
need to know the history of a Redken PH Chart
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Was posted on - Sunday, October 07, 2001 at 19:08:14 (EDT)
2,583.) Nitin's question is
I saw your "LEO the lion goes GER". I would like to introduce:-
OILRIG
Oxidation Is Loss of electrons.
Reduction Is Gain of electrons.
Kind regards,
nitin_b_85@yahoo.com
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Was posted on - Sunday, October 07, 2001 at 12:50:37 (EDT)
2,578.) Joey Villeneuve's question is
..
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2,575.) mary's question is
What is a simple way of balancing equations?
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2,570.) kerri's question is
Any help will be appreciated
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Need quick answer........
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2,559.) Kristin's question is
chem
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2,552.) matt haywood's question is
PH3 is Phosphine.. What is the ine suffix and why is it applied?
Thank you for your help!
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Was posted on - Tuesday, October 02, 2001 at 08:25:33 (EDT)
2,549.) Chrissie's question is
Is there an easy way to find out how much nitric acid can be produced using the Ostwald process without running the starting amount of ammonia through all three equations?
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Was posted on - Monday, October 01, 2001 at 22:42:08 (EDT)
2,546.) Chrissie's question is
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2,539.) Andrew Steiner's question is
How do you measure the amount of salt and/ or air in a sand mixture?
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2,538.) Andrew Steiner's question is
How do you measure the amount of salt and/ or air in a sand mixture?
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Need help with naming Ionic and covalent bonds
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2,526.) Joanne's question is
...
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Was posted on - Thursday, September 27, 2001 at 20:21:41 (EDT)
2,522.) Patrick Herrington's question is
A commpound of iron and chlorine is soluble in water. An excess of silver nitrate was added to precipitate the chlorine ion as silver chloride. If a 134.8-mg sample of the compound gave 304.8 mg AgCl, what is the formula of the compound? P.S. this is a problem that has the answer I was hoping to get help with th soloution so I could work the other similar problems.
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Was posted on - Thursday, September 27, 2001 at 19:16:47 (EDT)
2,518.) Kama Hough's question is
I need help on this question
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Was posted on - Tuesday, September 25, 2001 at 17:04:17 (EDT)
2,515.) Vic Gismondi's question is
A block is found to have A VOlume of 35.3cm cubed. Its mass is 31.7g. Calculate the density of the block.
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Was posted on - Tuesday, September 25, 2001 at 02:28:33 (EDT)
2,511.) tiffany 's question is
a 50 mL sample of tap water with added indicator and buffer is titrated to the endpoint with 15.13 mL of .00500M EDTA solution. How many moles of Ca 2+ and Mg 2+ are in this sample of tap water? How hard is the water expressed in ppm?
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Was posted on - Monday, September 24, 2001 at 22:55:26 (EDT)
2,508.) Becky's question is
I just need the chemical formulas for the two acids... thanks!
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Was posted on - Monday, September 24, 2001 at 22:49:17 (EDT)
2,503.) Sarah B's question is
What does an Arsenic atom, Aluminum atom, Potassium atom and a Chlorine atom look like?
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Was posted on - Sunday, September 23, 2001 at 14:47:08 (EDT)
2,502.) Sarah B's question is
Thank you!
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Was posted on - Sunday, September 23, 2001 at 14:45:22 (EDT)
2,499.) Miya's question is
what is the relationship between copper II sulfate pentahydrate, sodium chloride, water and a nail?? why does it make it reddish?
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Was posted on - Saturday, September 22, 2001 at 22:27:24 (EDT)
2,497.) Miya's question is
i hope this will help
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Was posted on - Saturday, September 22, 2001 at 22:25:53 (EDT)
2,493.) Rene L's question is
I would love if you guys could give me an anwer to my question. this question has been waning on my mind and to me there is two different answer to the question based on the circumstances. (Suppose the density of a given liquid increases, will the hydrometer used to determine it float higher or lower in the liqud?)
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Was posted on - Saturday, September 22, 2001 at 18:17:37 (EDT)
2,491.) Tarah Moar's question is
Is salt water considered to be a homogenous solution if not what is it? Also is the food honey considered to be a compound or a hetergenous solution?
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Was posted on - Saturday, September 22, 2001 at 13:32:23 (EDT)
2,489.) Tarah Moar's question is
This seems like a neat site to learn about Chemistry and also help out others too.
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Was posted on - Saturday, September 22, 2001 at 13:24:23 (EDT)
2,486.) neil bullock's question is
I hope i will get the help that I need because this my first time using this website, and I am having trouble in chemistry.
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Was posted on - Friday, September 21, 2001 at 23:57:59 (EDT)
2,484.) KHALIL TRABELSI's question is
Please answer the questions?
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Was posted on - Friday, September 21, 2001 at 19:32:10 (EDT)
2,480.) Donna's question is
I am visiting your site for the first time tonight and I was just wondering when looking at the periodial table, how can you tell which would be the rarest of the natural elements.... it's abit of question for me. Great sites, though!
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Was posted on - Friday, September 21, 2001 at 00:33:31 (EDT)
2,474.) kyle's question is
need the necessary for life uses for elements francium and astatine
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Was posted on - Thursday, September 20, 2001 at 00:50:21 (EDT)
2,471.) James Anderson's question is
I there a catalyst / additive which will reduce the cure time of an epoxy resin, e.g. phenol?
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Was posted on - Wednesday, September 19, 2001 at 05:56:34 (EDT)
2,470.) James Anderson's question is
Excellent!
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Was posted on - Wednesday, September 19, 2001 at 05:53:31 (EDT)
2,468.) mmaz's question is
i want to know what is the difference between the material and the subastance.
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Was posted on - Monday, September 17, 2001 at 17:17:24 (EDT)
2,466.) Lil Tricey's question is
I would like to know the equation for volume...Thanks
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Was posted on - Saturday, September 15, 2001 at 22:18:30 (EDT)
2,460.) Kristen Manning's question is
The volume of seawater on Earth is 3.3 x 10^8 mi squared. If seawater is 3.5% sodium chloride by mass and seawater has a density of 1.03 g/mL, what is the approximate mass of sodium chloride, in tons, dissolved in the seawater on Earth?
1 kim= 0.620 miles, 1 ton= 2000 lbs, 1 lb= 453.6 g
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Was posted on - Wednesday, September 12, 2001 at 01:04:35 (EDT)
2,458.) Kristen Manning's question is
i hope that you all can help me with my posted question. I have been working on these questions for a week.
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Was posted on - Wednesday, September 12, 2001 at 00:56:09 (EDT)
2,455.) Alice's question is
what is the major product for the reaction between chlorine and propane?
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Was posted on - Monday, September 10, 2001 at 06:20:13 (EDT)
2,454.) Alice's question is
This website is educational!
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Was posted on - Monday, September 10, 2001 at 06:18:14 (EDT)
2,452.) nicole's question is
what is the formula for volume?
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Was posted on - Sunday, September 09, 2001 at 22:43:20 (EDT)
2,450.) Nikki's question is
What happens to atoms during a chemical reaction?
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Was posted on - Sunday, September 09, 2001 at 19:31:45 (EDT)
2,445.) STEFAN CISNEROS's question is
GREAT SITE!
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Was posted on - Sunday, September 09, 2001 at 12:40:00 (EDT)
2,442.) Sara's question is
Resources on the Internet
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Was posted on - Friday, September 07, 2001 at 11:42:28 (EDT)
2,438.) Stan Niko's question is
Can anyone tell me the H to C ratio in standard diesel fuel for small engines?
All help appreciated,
Thank you,
Stan
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Was posted on - Thursday, September 06, 2001 at 16:19:41 (EDT)
2,435.) jerald's question is
Pls answer my question ASAP. TY
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Was posted on - Wednesday, September 05, 2001 at 11:31:31 (EDT)
2,431.) Ang's question is
none
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Was posted on - Sunday, September 02, 2001 at 17:27:44 (EDT)
2,427.) christopher reisinger's question is
I have a few interesting questions I just wanted to know the answers to.
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Was posted on - Wednesday, August 29, 2001 at 22:47:19 (EDT)
2,426.) christopher reisinger's question is
I have a few interesting questions I just wanted to know the answers to.
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Was posted on - Wednesday, August 29, 2001 at 22:46:38 (EDT)
2,425.) christopher reisinger's question is
I have a few interesting questions I just wanted to know the answers to.
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Was posted on - Wednesday, August 29, 2001 at 22:45:24 (EDT)
2,423.) may's question is
PLEASE!!!!!!!!!!!! if any one can help meh i will be so happy. Wellmy 8th grade teacher gave us a project on a Chemistry ABC book. It has 26 pages, and it's due on sept 11. I need a timeline biography graphs, pictures, and an 0zom malleable. For every letter i need a word that starts with the letter that has to do with chemistry. This is very hard for me b/c i jst started school on the first day and i'm already doing a project. I don't need help on this and my question is. Which chemisty words are the best? Please email meh at lil_dudette_6000@yahoo.com. Putting my email address is because i am desprate. I don't want an answer on making my book i just need the best help i can get. PLEASE send ideas to my email address ASAP... THANK U!!!!!!!!!!!!!!!!!!!!!
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Was posted on - Tuesday, August 28, 2001 at 01:21:52 (EDT)
2,419.) Bryan VanDeWalle's question is
How to draw the lewis dot structure for LiCl
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Was posted on - Monday, August 27, 2001 at 19:14:25 (EDT)
2,415.) Ace Munroe's question is
Why do ionic fluids carry an electric current but ionic solids do not?????
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Was posted on - Monday, August 27, 2001 at 04:02:43 (EDT)
2,414.) Ace Munroe's question is
Its very good
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Was posted on - Monday, August 27, 2001 at 04:01:27 (EDT)
2,410.) jerilee inniss's question is
I doing chemistry and i do not understand how to balance chemical equation
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Was posted on - Wednesday, August 22, 2001 at 09:25:49 (EDT)
2,408.) kendra's question is
no comment
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Was posted on - Wednesday, August 22, 2001 at 00:15:55 (EDT)
2,400.) Jonathon Comas's question is
I am doing a social relevence report on monosodium glutamate and i need any relevent information on the chemistry of MSG.
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Was posted on - Monday, August 20, 2001 at 09:11:34 (EDT)
2,398.) Lanese's question is
none
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Was posted on - Sunday, August 19, 2001 at 12:23:43 (EDT)
2,393.) Ashley's question is
I don't understand this... I need help
.003cg=_____ lbs
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Was posted on - Monday, August 13, 2001 at 16:37:42 (EDT)
2,390.) patty's question is
what is conductivity?
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Was posted on - Sunday, August 12, 2001 at 17:53:51 (EDT)
2,384.) Kyle Dana's question is
Thanks.
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Was posted on - Friday, August 03, 2001 at 09:36:53 (EDT)
2,380.) matt hansons's question is
please help answer my question
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Was posted on - Sunday, July 29, 2001 at 23:10:37 (EDT)
2,377.) Muhammad ali's question is
I WILL LOVE YOUR SITE AND TELL TO MY PALS BOUT IT IF YOU GONNA TELL ME THE ANSWER OF MY QUERRY
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Was posted on - Friday, July 27, 2001 at 10:01:22 (EDT)
2,370.) Kitty's question is
I think this site is awesome!!!!!!!!
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Was posted on - Friday, July 20, 2001 at 07:10:27 (EDT)
2,365.) cane's question is
how does heat breakdown the chemical structure of vitamin C?
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Was posted on - Wednesday, July 18, 2001 at 22:54:21 (EDT)
2,361.) cane's question is
I would appreciated your help for I have searched everywhere to try and find this answer. thank-you
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Was posted on - Wednesday, July 18, 2001 at 22:52:19 (EDT)
2,360.) cane's question is
I would appreciated your help for I have searched everywhere to try and find this answer. thank-you
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Was posted on - Wednesday, July 18, 2001 at 22:49:30 (EDT)
2,357.) Irene's question is
Please help!!!
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Was posted on - Monday, July 16, 2001 at 21:05:27 (EDT)
2,355.) Caydee's question is
If one mole of N^2H^3CH^3 is allowed to react with excess N^2O^4 so that all of the N^2H^3CH^3 is consumed,how many molecules of water will be produced?????
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Was posted on - Sunday, July 15, 2001 at 01:34:40 (EDT)
2,353.) Caydee's question is
Aluminum hydroxide,Al(OH)^3,is a common component of antacid tablets.If an upset stomach contains 100ml of 0.1M hydrochloric acid,how many grams of aluminum hydroxide are needed to neutralize all of the stomach acid????
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Was posted on - Sunday, July 15, 2001 at 01:28:45 (EDT)
2,351.) Jeff Keiling's question is
thanks
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Was posted on - Sunday, July 08, 2001 at 23:41:45 (EDT)
2,349.) Kristen Ley's question is
this is great
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Was posted on - Thursday, July 05, 2001 at 16:48:38 (EDT)
2,346.) Pat's question is
Thanks a lot for your help.
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Was posted on - Thursday, July 05, 2001 at 09:45:52 (EDT)
2,340.) Yula Kontelia's question is
I would be grateful if you could provide an answer to my querry
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Was posted on - Tuesday, June 26, 2001 at 09:28:53 (EDT)
2,338.) Jo Ox's question is
Can you please tell me ehat a mass spectrometrist does.
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Was posted on - Monday, June 25, 2001 at 12:01:05 (EDT)
2,332.) tracy's question is
you didn't answer our question
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Was posted on - Friday, June 22, 2001 at 21:59:00 (EDT)
2,330.) Minella's question is
How do I figure out a coeffiecent? Such as what would be the coeffiecent of 4 H20?
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Was posted on - Tuesday, June 19, 2001 at 16:20:27 (EDT)
2,328.) Ashley Marcol's question is
Is is possible to dissolve (completely) 15 mg of AuCL in 100mL of pure water if you add 15 mL of 6.00 M NaCN?
I want to know if this is possible and how.
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Was posted on - Monday, June 18, 2001 at 13:01:13 (EDT)
2,326.) Ashley Marcol's question is
I want to know if this is possible and how it is.
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Was posted on - Monday, June 18, 2001 at 12:58:07 (EDT)
2,320.) wendy's question is
thank you all!!
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Was posted on - Wednesday, June 13, 2001 at 20:14:40 (EDT)
2,316.) vanessa olaguer's question is
nothing
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Was posted on - Tuesday, June 12, 2001 at 04:39:42 (EDT)
2,314.) Neeru Chawla's question is
THANKS FOR HELP IN MY QUESTION.
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Was posted on - Sunday, June 10, 2001 at 15:26:43 (EDT)
2,312.) sgfsdhffh's question is
none
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Was posted on - Sunday, June 10, 2001 at 07:25:03 (EDT)
2,308.) belinda's question is
this site is really helpful
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Was posted on - Sunday, June 10, 2001 at 03:20:33 (EDT)
2,305.) evan's question is
how much sugar can be soluted into a gallon of water? What is the differance When mixed into hot water? When the water cools does the sugar stay mixed?
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Was posted on - Saturday, June 09, 2001 at 20:26:22 (EDT)
2,302.) Katie's question is
Thanks for all your help!
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Was posted on - Thursday, June 07, 2001 at 19:16:58 (EDT)
2,299.) Andrew Johnson's question is
Need data about chemical compound -resin, and use?
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Was posted on - Monday, June 04, 2001 at 19:10:16 (EDT)
2,296.) emel kul's question is
using medicine industry in coordination chemistry
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Was posted on - Sunday, June 03, 2001 at 07:06:18 (EDT)
2,294.) Kendra's question is
How can I find the colors of complexes with transition elements?
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Was posted on - Thursday, May 31, 2001 at 15:21:38 (EDT)
2,292.) Kendra's question is
neat site....I hope it helps me with my questions!
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Was posted on - Thursday, May 31, 2001 at 15:20:08 (EDT)
2,289.) Celeste's question is
A new chemistry student seeks help on a chemistry project.What would one recomend to be the best analytical method used to find the greatest amount of a substance in different lotions.
ex. Spectrometry, chromatography, etc.
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Was posted on - Sunday, May 27, 2001 at 16:36:16 (EDT)
2,288.) Celeste's question is
A new chemistry student seeks help on a chemistry project.
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Was posted on - Sunday, May 27, 2001 at 16:35:06 (EDT)
2,286.) Neeraj Adya's question is
There are 3 different units being used to measure the concentration of peroxide (H2O2),
(1) MEQ O2/Kg,
(2) PPM (parts per million), and
(3) Molarity.
What is the conversion relationship between MEQ O2/kg, PPM and Molarity.
For lack of a good basic book, what will be a good site which references such basics.
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Was posted on - Friday, May 25, 2001 at 18:48:23 (EDT)
2,284.) sophie's question is
Is Sodium carbonate a weak or a strong base?
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Was posted on - Thursday, May 24, 2001 at 10:46:15 (EDT)
2,281.) kylee's question is
4 indications of a chemical reaction
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Was posted on - Wednesday, May 23, 2001 at 16:44:08 (EDT)
2,278.) erika mcewan's question is
is there an good experiments to show middle school children to help them better understand equilibrium?
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Was posted on - Monday, May 21, 2001 at 22:55:39 (EDT)
2,275.) Kim's question is
i really like this website because it gives a chance for people to come on here and get help with some of their homework that they might not understand. its a great website for school people.
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Was posted on - Sunday, May 20, 2001 at 12:52:13 (EDT)
2,270.) steve's question is
is there a chemical way to remove oxygen from water
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Was posted on - Wednesday, May 09, 2001 at 22:26:34 (EDT)
2,265.) Bhavin 's question is
Hoping to get an answer
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Was posted on - Monday, May 07, 2001 at 00:22:49 (EDT)
2,261.) Olivia's question is
Please answer me fast!!
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Was posted on - Friday, May 04, 2001 at 23:36:41 (EDT)
2,254.) Veronica's question is
Good website in helping students learn more about Chemistry and trying to help others solve their problems.
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Was posted on - Wednesday, May 02, 2001 at 11:29:23 (EDT)
2,249.) majid aram's question is
Dear Sirs,
As a researcher I need to Vis.&IR absorption spectra of H2S . Any help is greatly appreciated.
Thank you in Advance,
Majid Aram.
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Was posted on - Wednesday, May 02, 2001 at 07:35:47 (EDT)
2,247.) al miller's question is
my question iswhy can we digest starch and not wood.
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Was posted on - Tuesday, May 01, 2001 at 21:43:39 (EDT)
2,245.) april 's question is
was wondering if their is a element necturnium and if so where did you find out about it i cant find anywhere
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Was posted on - Tuesday, May 01, 2001 at 21:04:37 (EDT)
2,243.) april's question is
JUST NEEDED INFO
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Was posted on - Tuesday, May 01, 2001 at 21:01:14 (EDT)
2,241.) Barbara 's question is
I am making antibacterial soap. I already understand saponification and have made soap many times. I have about 2 lbs of Triclosan in powdered form. I need to know how much to add by weight and when to add it, ie. during saponification or durling milling/rebatching. Can someone out there please use their contacts and get me this info? I am having no luck myself. Thank you! mockb1@yahoo.com
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Was posted on - Monday, April 30, 2001 at 14:05:58 (EDT)
2,236.) Brandon Wotachek's question is
An old copper penny can be dissolved in nitric acid but not in hydrochloric acid. Why is this so? What are the products of the reaction? Newer pennies contain a mixture of zinc and copper. What happens to this penny in nitric acid? in hydrochloric acid?
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Was posted on - Saturday, April 28, 2001 at 18:01:24 (EDT)
2,233.) Brandon Wotachek's question is
Nice Site
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Was posted on - Saturday, April 28, 2001 at 17:55:28 (EDT)
2,230.) Barbara 's question is
need help making antibacterial soap. when and how much triclosan to add.
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Was posted on - Friday, April 27, 2001 at 14:21:42 (EDT)
2,223.) brandon's question is
why is chemistry a part of school curriculum
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Was posted on - Thursday, April 19, 2001 at 21:29:08 (EDT)
2,221.) Topsy's question is
In chromatography, how do you determine the resolution of two peaks with different numbers of theoreticl plates, when you do not know the length of the column, or the width at the base of the peak?
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Was posted on - Thursday, April 19, 2001 at 08:32:15 (EDT)
2,218.) tim's question is
where can i find a print of the laws of conservation of matter and of energy.?
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Was posted on - Saturday, April 14, 2001 at 13:49:14 (EDT)
2,214.) the mighty atom's question is
if you was to add an excess of a metal to say....copper sulfate solution,what would you see and why?
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Was posted on - Friday, April 13, 2001 at 09:48:16 (EDT)
2,207.) B William's question is
The amino acid glycine, C2H5NO2, is one of the compounds used by the body to make proteins. The equation for its combustion is
4C2H5NO2(s)> 8CO2(g) + 10H2O(l) + 2N2(g)
For each mole of glycine that burns, 973.49 kJ of heat is liberated. what's the standard heat of formation for glycine?
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Was posted on - Wednesday, April 11, 2001 at 15:11:46 (EDT)
2,196.) EMILY's question is
GREAT!!!! ;O)
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Was posted on - Monday, April 09, 2001 at 21:54:11 (EDT)
2,194.) emily's question is
ur site is great!!
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Was posted on - Monday, April 09, 2001 at 15:44:23 (EDT)
2,192.) ManVy's question is
What are substances that less dense than water?
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Was posted on - Monday, April 09, 2001 at 14:09:00 (EDT)
2,191.) ManVy's question is
Good
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Was posted on - Monday, April 09, 2001 at 14:08:03 (EDT)
2,187.) bATESY's question is
I NEED ANSWERS!
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Was posted on - Sunday, April 08, 2001 at 15:27:03 (EDT)
2,185.) Derek Mann's question is
What ingredients makeup carbonated water. How can it be made from the convenience of your own home.
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Was posted on - Thursday, April 05, 2001 at 17:03:19 (EDT)
2,183.) Adam's question is
Thanks for the help!!!!
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Was posted on - Thursday, April 05, 2001 at 01:52:01 (EDT)
2,179.) Unity's question is
Please help me, this is killing my brain cells
Gaseous molecules of element X have the formula Xn
Molecular X2 reacts with Oxygen to form the oxide of X
volumes are:
10ml X2(g) + 50mL O2 (g) forms 20mL oxide of X
determine a) value of n
b) formula of the oxide of X
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Was posted on - Friday, March 30, 2001 at 19:08:40 (EST)
2,177.) frances mammarella's question is
Thanks
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Was posted on - Wednesday, March 28, 2001 at 16:28:09 (EST)
2,174.) andrea's question is
please find my answer
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Was posted on - Wednesday, March 28, 2001 at 10:50:12 (EST)
2,171.) Ashley's question is
A chemist reacts 140.00 g of calcium oxide with water. Calculate the percent yield if she produces 140.00 g of the only product, calcium hydroxide.
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Was posted on - Tuesday, March 27, 2001 at 22:46:10 (EST)
2,168.) Amy Wong's question is
What color is Fehling's Solution supposed to turn when it is
mixed with starch and saliva?
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Was posted on - Sunday, March 25, 2001 at 19:05:32 (EST)
2,164.) Meghan Price's question is
What is a good website to find a picture/model of s,p,and d orbitals, or where could I find a picture? I need a picure as a guidline for a clay adn toothpick model.
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Was posted on - Friday, March 23, 2001 at 19:11:10 (EST)
2,162.) rachel's question is
I was just dbl. checking myself on this one. I need to saturate 50 grams of a triglyceride, (linolenic, arachidonic, and oleic acid) with H2. I am guessing that I need 14 grams of Hydrogen since there is 7 dbl. bonds. If anyone can tell me if I am in the right direction, I would appreciate it. thanks.
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Was posted on - Thursday, March 22, 2001 at 19:06:22 (EST)
2,160.) Danny's question is
great
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Was posted on - Thursday, March 22, 2001 at 18:11:55 (EST)
2,151.) rachel's question is
thanks for any help
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Was posted on - Wednesday, March 21, 2001 at 23:53:40 (EST)
2,147.) Bry's question is
none
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Was posted on - Wednesday, March 21, 2001 at 19:04:19 (EST)
2,142.) isabel's question is
If possible I would like to receive a list of the oxidation numbers of the elements in the periodic table
thank you very much
isabel
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Was posted on - Wednesday, March 21, 2001 at 18:55:54 (EST)
2,139.) Richard Arrington's question is
What substances have the HIGHEST MELTING POINT and the HIGHEST BOILING POINT?
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Was posted on - Wednesday, March 21, 2001 at 15:24:20 (EST)
2,136.) Allison Kendziora's question is
Lead and sulfate should react in what ratio?
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Was posted on - Sunday, March 18, 2001 at 23:48:07 (EST)
2,133.) bob's question is
i would like to know the role of chemists in the development of medicines to treat asthma
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Was posted on - Monday, March 12, 2001 at 09:59:55 (EST)
2,131.) kk's question is
Could u tell me the value for the enthalpy change of solution of potassium nitrate KNO3 and give me the source of your answer
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Was posted on - Sunday, March 11, 2001 at 09:14:04 (EST)
2,125.) mandy 's question is
I can't find any answers in this place, I thought this place was suppossed to help students, not waste their time when they need real help. I have looked everywhere and either I can't get an answer or thw room is not available.
Thanks~Mandy
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Was posted on - Thursday, March 08, 2001 at 09:42:54 (EST)
2,120.) Rebecca's question is
this is great that we can get help.
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Was posted on - Tuesday, March 06, 2001 at 00:17:03 (EST)
2,114.) Brittaney's question is
I'm doing an experiment and I have been given an unknown chemical. I have to experiment and decide whether it's Ammonium Acetate, Strontium Chloride, Ammonium Chloride, Calcium Chloride, Zinc Acetate, Sodium Chloride, Potassium Chloride, Magnesium Sulfate or DiHydrogen Monoxide. Any Suggestions?
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Was posted on - Sunday, March 04, 2001 at 22:58:52 (EST)
2,111.) Assem's question is
I just ask how I can prepare Potassium iodate in the laboratory.
Thanks
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Was posted on - Friday, March 02, 2001 at 07:21:21 (EST)
2,108.) marie's question is
if you know the pressure of a mixture of two compounds and the pressure of one of the products, with the temp and volume remaining constant how would you find the percent of one of the compounds in the mixture?
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Was posted on - Thursday, March 01, 2001 at 17:10:04 (EST)
2,105.) marie's question is
i hope you can answer my question
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Was posted on - Thursday, March 01, 2001 at 17:06:07 (EST)
2,102.) Nick Mendola's question is
I am a first time user of this site. Appears to be interesting.
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Was posted on - Wednesday, February 28, 2001 at 22:38:23 (EST)
2,100.) Shanna Womack's question is
I NEED HELP BAD I AM FAILING CHEMISTRY I DONT UNDERSTAND ANYTHING IN THIS CLASS BUT NEED TO TAKE FOR COLLEGE CAN SOMEONE HELP ME PLEASE IN ANYTHING
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Was posted on - Wednesday, February 28, 2001 at 22:07:42 (EST)
2,098.) Shanna Womack's question is
How do i do molar mass and grams to moles conversion!
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Was posted on - Wednesday, February 28, 2001 at 21:59:59 (EST)
2,095.) Will Robbins's question is
comments on what?
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Was posted on - Tuesday, February 27, 2001 at 11:20:31 (EST)
2,092.) PBuffonge's question is
Acid indigestion can be cured by drinking a solution of a weak --------- (the answer is a 6 letter word)
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Was posted on - Tuesday, February 27, 2001 at 07:51:01 (EST)
2,090.) DBuffonge's question is
What forms when acid meets alkaline?
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Was posted on - Tuesday, February 27, 2001 at 07:48:06 (EST)
2,085.) Chris Wilson's question is
At a wavelength of 532nm, DNA molecules don't fluoresce. However, when mixed withn a salt solution, they appear bright green at that wavelength...why? I read a bout 'tritle chemistry' but don't remember the source. Thanks for your help!
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Was posted on - Saturday, February 24, 2001 at 20:42:53 (EST)
2,083.) Sabrina 's question is
This is a great site and I hope that my questions can be answered. How do I figure out the bond angles for a specific element? I know that SF4 (the 4 is subscript) has bond angles of 179 and 103 degrees, but how do I prove these angles or figure them out? Thanks for your help!
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Was posted on - Saturday, February 24, 2001 at 00:04:42 (EST)
2,077.) Joe James's question is
cool - should be able to be informed by email when question is answered rather than having to keep on coming back and checking
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Was posted on - Friday, February 23, 2001 at 05:55:40 (EST)
2,075.) Darko Pribeg's question is
Why is it that Thallium discharges only one electron from the last orbit although it has three electrons in the last orbit as all the metals in the 3. main group?
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Was posted on - Wednesday, February 21, 2001 at 07:36:09 (EST)
2,073.) Darko Pribeg's question is
Thank you
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Was posted on - Wednesday, February 21, 2001 at 07:33:54 (EST)
2,070.) Joshua Dodd's question is
Seems simple to use but have not gotten an answer yet because
I only just submitted it. Hopefully answers will come quickly.
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Was posted on - Tuesday, February 20, 2001 at 03:08:05 (EST)
2,068.) Angie Hartman's question is
How do I find the name of a compound when I have the % of each element? for example, 57% oxygen, 27% sodium, 14% carbon and 2% hydrogen?
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Was posted on - Saturday, February 17, 2001 at 16:05:03 (EST)
2,066.) sul's question is
Does matter have color?
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Was posted on - Saturday, February 17, 2001 at 01:21:41 (EST)
2,064.) Roxanne Henry's question is
hELP ME WITH THIS QUESTION
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Was posted on - Friday, February 16, 2001 at 10:55:22 (EST)
2,060.) Marie-H Mourant's question is
If the temparature of gaz goes from 100C to 200C , what will be the difference of volume?
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Was posted on - Thursday, February 15, 2001 at 21:10:40 (EST)
2,058.) Marie-Helene Mourant's question is
Why do we get automatically cold when we get out of water even though the weather is warm?
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Was posted on - Thursday, February 15, 2001 at 21:04:40 (EST)
2,057.) Marie-Helene Mourant's question is
Why do we get automatically cold when we get out of water even though the weather is warm?
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Was posted on - Thursday, February 15, 2001 at 20:52:22 (EST)
2,056.) Marie-Helene Mourant's question is
Why do we get automatically cold when we get out of water even though the weather is warm?
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Was posted on - Thursday, February 15, 2001 at 20:51:43 (EST)
2,054.) Marie-Helene Mourant's question is
thank you
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Was posted on - Thursday, February 15, 2001 at 20:50:24 (EST)
2,052.) walter rivas's question is
your site is preatty well inormed except that it would be
better to get the answeres when you needed them.
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Was posted on - Wednesday, February 14, 2001 at 16:05:50 (EST)
2,045.) Alyssa's question is
*
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Was posted on - Monday, February 12, 2001 at 16:29:44 (EST)
2,040.) David's question is
Can we ever establish human chemical averages for the chemicals in our bodies and then affect changes in behavior by changing our chemical levels?
Thank you very much.
David
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Was posted on - Monday, February 05, 2001 at 21:49:38 (EST)
2,038.) crabottle's question is
What is the Harcourt-Esson equation?
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Was posted on - Sunday, February 04, 2001 at 11:25:00 (EST)
2,034.) Osama Abduo's question is
thanks
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Was posted on - Saturday, February 03, 2001 at 05:16:09 (EST)
2,029.) seabee's question is
hello
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Was posted on - Friday, February 02, 2001 at 10:07:07 (EST)
2,023.) Clare's question is
I am conducting an experiment: I have three mason jars- I stuck steel wool (stripped from soaking in vineger)in the bottom of each and them flipped the jars upside down in dished of water. One is near a vent (72 degrees) one is in the oven (150 degrees) and one is in the fridge (around 40 degrees). The cold one is sucking up the most water, the hot one has pushed ALL water out and the warm one is slowly sucking up water. I can't find out why anywhere? Please help! thanks
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Was posted on - Saturday, January 27, 2001 at 15:19:32 (EST)
2,021.) Clare's question is
No comments
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Was posted on - Saturday, January 27, 2001 at 15:18:50 (EST)
2,018.) Stella's question is
Please help
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Was posted on - Thursday, January 25, 2001 at 13:01:06 (EST)
2,017.) Stella's question is
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Was posted on - Thursday, January 25, 2001 at 12:57:23 (EST)
2,014.) stella's question is
What happen when we add lemon in a CO2 beverage
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Was posted on - Wednesday, January 24, 2001 at 11:26:47 (EST)
2,012.) dkruse's question is
please help.
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Was posted on - Tuesday, January 23, 2001 at 22:29:25 (EST)
2,009.) Rolo's question is
what is the possible explanation for copper (II) sulpahte and copper (II) nitrate solutions being the same colour?
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Was posted on - Monday, January 22, 2001 at 23:52:42 (EST)
2,007.) Raheleh Sarbaziha's question is
HELPME
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Was posted on - Monday, January 22, 2001 at 23:49:58 (EST)
2,005.) cassie's question is
Using the pencil provided determine the percent composition for the parts as if it were a compound. When you have determined this composition, express it as the compound formula MaEbWcLd M is the metal E is the eraser W is the wood L is the lead and abcd are the subscripts in the compound formula. How do we go about getting the answer to this?
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Was posted on - Sunday, January 21, 2001 at 18:03:58 (EST)
2,003.) Rowell B. Datlag's question is
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Was posted on - Thursday, January 18, 2001 at 20:51:18 (EST)
2,001.) neal's question is
what is the heat of formation for MgO(s)?
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Was posted on - Wednesday, January 17, 2001 at 20:29:49 (EST)
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Was posted on - Wednesday, January 17, 2001 at 20:28:47 (EST)
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Was posted on - Wednesday, January 17, 2001 at 20:26:59 (EST)
1,997.) stella's question is
what happen when putting a slice of lemon in a CO2 beverage?
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Was posted on - Monday, January 15, 2001 at 15:24:10 (EST)
1,995.) stella 's question is
what happen when putting a slice of lemon in
a CO2 beverage?
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Was posted on - Monday, January 15, 2001 at 14:42:01 (EST)
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Was posted on - Monday, January 15, 2001 at 14:40:38 (EST)
1,990.) tomy joseph's question is
Is it possible to color red gold , 24 ct yellow color without using cynide?
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Was posted on - Saturday, January 13, 2001 at 23:34:50 (EST)
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Was posted on - Thursday, January 11, 2001 at 17:38:36 (EST)
1,982.) julie's question is
how much heat is required to raise the temperature of 854g H2O from 23.5 c to 85.0 c?
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Was posted on - Wednesday, January 10, 2001 at 23:19:48 (EST)
1,981.) julie's question is
how long is this going to take?
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Was posted on - Wednesday, January 10, 2001 at 23:17:19 (EST)
1,978.) Darwin 's question is
Hope you can help me.
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Was posted on - Tuesday, January 09, 2001 at 02:13:15 (EST)
1,973.) CHristine C. de la Cruz's question is
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Was posted on - Tuesday, January 09, 2001 at 02:08:22 (EST)
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Was posted on - Tuesday, January 09, 2001 at 02:04:32 (EST)
1,969.) Christine de la Cruz's question is
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Was posted on - Tuesday, January 09, 2001 at 01:55:58 (EST)
1,967.) Janaka Athukorala's question is
This system is very helpful to us
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Was posted on - Saturday, January 06, 2001 at 21:48:53 (EST)
1,964.) Kris's question is
A mixture of ethyne C2H2 and methane CH4 occupied a certain volume at a total pressure of 16.8kPa. Upon burning the sample to form CO2 and H2O, the CO2 was collected and its pressure found to be 25.6kPa in the same volume and at the same temperature as the original mixture. What percent of the original mixture was methane??
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Was posted on - Wednesday, January 03, 2001 at 16:44:51 (EST)
1,962.) Kris's question is
none
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Was posted on - Wednesday, January 03, 2001 at 16:43:20 (EST)
1,955.) me's question is
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Was posted on - Tuesday, January 02, 2001 at 01:19:32 (EST)
1,953.) Val's question is
What are the symbols for elements 119 and 120?
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Was posted on - Sunday, December 31, 2000 at 16:09:14 (EST)
1,950.) Tim's question is
A mixture of salt and pepper analyzes at 50% chlorine by mass, if pepper contains no chlorine what % of this mixture is pepper. ( This is an extra credit problem that I cannot seem to figure out so could someone please help me????
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Was posted on - Tuesday, December 19, 2000 at 17:00:36 (EST)
1,941.) doug's question is
definition of a curing agent
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Was posted on - Thursday, December 07, 2000 at 15:44:59 (EST)
1,938.) Jackie's question is
What is a net ionic equation, and how do I write one?
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Was posted on - Sunday, December 03, 2000 at 19:24:43 (EST)
1,936.) Megan's question is
This seems to be a helpful site.
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Was posted on - Sunday, December 03, 2000 at 19:23:21 (EST)
1,931.) Bj's question is
what is RED PHOSPHOURUS
and where can it be bought
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Was posted on - Monday, November 27, 2000 at 04:04:28 (EST)
1,929.) Alex Bailey's question is
Lets just put it at this,bub.If you can't answer this question, I guess I'll understand.I am just interested about the periodic table of elements, and I'm just curious about how it works.
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Was posted on - Sunday, November 26, 2000 at 23:30:09 (EST)
1,927.) Jovonda's question is
Debates about chemical pollution and pesticides?
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Was posted on - Sunday, November 26, 2000 at 23:24:38 (EST)
1,923.) Kelsey's question is
Periodic table
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Was posted on - Sunday, November 26, 2000 at 16:39:00 (EST)
1,919.) mark Williams's question is
Why is K2SO4 relatively insoluble in formamide (dielectric=84), while carbohydrates are relatively soluble?
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Was posted on - Sunday, November 26, 2000 at 12:08:46 (EST)
1,917.) Mark Williams's question is
Thanks!
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Was posted on - Sunday, November 26, 2000 at 12:02:51 (EST)
1,915.) Nilesh G.'s question is
I am trying to get some help on manufacturing process of Rhodium Sulphate solution ( which is used for Rhodium plating of Jewelry ) I would appreciate any feed back
Thanks.
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Was posted on - Saturday, November 25, 2000 at 23:16:30 (EST)
1,909.) Stephanie's question is
Please Help!!
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Was posted on - Wednesday, November 22, 2000 at 13:22:37 (EST)
1,905.) jean's question is
which is the more sensitive technique and why, FT-IR or NMR?
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Was posted on - Tuesday, November 21, 2000 at 11:50:18 (EST)
1,903.) ARISHA 's question is
NO COMMENTS
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Was posted on - Tuesday, November 21, 2000 at 03:22:44 (EST)
1,899.) Clement Olusegun Obadimu's question is
I can extract crude oil from water using chloroform (Trichloromethane).
I have an objective of tracing oil in water from its sources
How can the crude oil in the chloroform extract be characterised ( identified )?
Can GC-MS help?
Who and where can this be done?
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Was posted on - Monday, November 20, 2000 at 01:07:33 (EST)
1,897.) Chad Salewich's question is
What is the chemical process for refining uranium ore?
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Was posted on - Sunday, November 19, 2000 at 20:45:23 (EST)
1,895.) Amber Fulkerson's question is
Helpful site!
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Was posted on - Sunday, November 19, 2000 at 18:46:26 (EST)
1,893.) Robert's question is
Does anoyne have any interesting ideas for a highschool chemistry research project?
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Was posted on - Sunday, November 19, 2000 at 17:45:35 (EST)
1,891.) Rob's question is
good
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Was posted on - Sunday, November 19, 2000 at 17:43:51 (EST)
1,888.) ali assar's question is
dear sir
i want to know a compleat information about jelatin and it's price and the price of sodium and sodium peroxide
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Was posted on - Sunday, November 19, 2000 at 06:43:02 (EST)
1,887.) ali assar's question is
i want the list of asian and uropian chemical supliers
i want to know the name and adress of sodium and sodium peroxide producers
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Was posted on - Sunday, November 19, 2000 at 06:39:12 (EST)
1,880.) shawna's question is
what are the major differences between a homogeneous mixture and a compound?
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Was posted on - Thursday, November 16, 2000 at 16:24:52 (EST)
1,879.) shawna's question is
none
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Was posted on - Thursday, November 16, 2000 at 16:23:58 (EST)
1,876.) Monica 's question is
At what temperature does regular paper catch fire and burn?
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Was posted on - Thursday, November 16, 2000 at 10:18:57 (EST)
1,873.) Eric Smith's question is
thankyou
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Was posted on - Wednesday, November 15, 2000 at 14:55:03 (EST)
1,871.) kate's question is
i hope to get answers soon. Thank you for putting up such dependable website!:)
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Was posted on - Wednesday, November 15, 2000 at 10:52:36 (EST)
1,869.) assem's question is
I just ask how I can prepare a sample of collodion in my lab.
Please advise, Thanks
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Was posted on - Tuesday, November 14, 2000 at 17:06:14 (EST)
1,864.) Seth's question is
Hey!
In my 8th Grade Science Class, we are doing a final project. Our techer has mixed a bunch of chemicals, and we have to take them out and put them ... seperate.
Can someone help me? My email is seth@micracorp.com
THANKS!
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Was posted on - Monday, November 13, 2000 at 20:54:39 (EST)
1,860.) Robert Kiel's question is
How do you measure the amount of protein in plants?
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Was posted on - Monday, November 13, 2000 at 19:56:05 (EST)
1,856.) Morgan's question is
Thanks for the helpful site.
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Was posted on - Monday, November 13, 2000 at 16:14:52 (EST)
1,853.) Zach Nelson's question is
How do i calculate molality?
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Was posted on - Monday, November 13, 2000 at 09:39:26 (EST)
1,851.) Holly Miller's question is
Very educatinal will help alot of people like me
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Was posted on - Monday, November 13, 2000 at 02:15:03 (EST)
1,847.) nicole's question is
very helpful
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Was posted on - Sunday, November 12, 2000 at 21:42:03 (EST)
1,846.) nicole's question is
very helpful
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Was posted on - Sunday, November 12, 2000 at 21:41:54 (EST)
1,840.) Nikki's question is
You have to be able to tell the difference between pepsi and diet pepsi without tasting. You have Ph paper, distilled water, lemon juice, baking soda, sugar cubes, food coloring, vinegar and salt to help you. How do you tell the diff?
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Was posted on - Sunday, November 12, 2000 at 19:51:03 (EST)
1,839.) Nikki's question is
NONE
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Was posted on - Sunday, November 12, 2000 at 19:47:42 (EST)
1,834.) Karen's question is
Thank you for your help
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Was posted on - Saturday, November 11, 2000 at 21:36:18 (EST)
1,830.) alva's question is
how is perfume made and what chemicals are in it?
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Was posted on - Saturday, November 11, 2000 at 10:35:17 (EST)
1,824.) Rick's question is
What is the safe level of lead for the human body?
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Was posted on - Friday, November 10, 2000 at 07:57:08 (EST)
1,820.) Bebe's question is
i'm trying to study for a test, but i can't find the answers in the textbook.
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Was posted on - Wednesday, November 08, 2000 at 17:58:16 (EST)
1,818.) David Penskar's question is
Hydrogen gas and then a purplish alkali liquid were formed.
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Was posted on - Tuesday, November 07, 2000 at 22:47:20 (EST)
1,815.) Mackenzie's question is
In the process of "chemical extraction," in regards to the decaffeination of coffee, dimethylchloride (CH2Cl2) is used to dissolve the caffeine molecules, which are polar. Hwever, CH2Cl2 is a non-polar substance! (Or so I think!) How can the polar caffeine molecule dissolve in the non-polar dichloromethane molecules when SUPOSEDLY two molecules of different polarities can not mix!?!?!? Please help! Thank you!
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Was posted on - Tuesday, November 07, 2000 at 21:27:59 (EST)
1,810.) catlin olmstead's question is
i need help.
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Was posted on - Tuesday, November 07, 2000 at 20:14:12 (EST)
1,807.) Anonymus's question is
I need help finding information to answer my question. My question is how do you tell if an object has insulating properties?
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Was posted on - Tuesday, November 07, 2000 at 12:27:34 (EST)
1,798.) jone gamillas's question is
Need by today 5, November at 4:20
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Was posted on - Sunday, November 05, 2000 at 18:47:34 (EST)
1,794.) Jane's question is
helpful site
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Was posted on - Saturday, November 04, 2000 at 14:23:56 (EST)
1,792.) Kay's question is
I'm looking for decompose temperature of Al2Se3 and preparation of GaCrSe or GaCrS or GaCrO
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Was posted on - Saturday, November 04, 2000 at 14:22:01 (EST)
1,790.) Kay's question is
Please help me. It's very important for me.
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Was posted on - Saturday, November 04, 2000 at 14:16:19 (EST)
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Good!!!!
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Was posted on - Friday, November 03, 2000 at 08:29:26 (EST)
1,785.) mike 's question is
how do i figure out changes in volume when adding crystallized acid to water
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Was posted on - Thursday, November 02, 2000 at 16:04:01 (EST)
1,781.) edward guttierrez 's question is
this is extay credit for shcool
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Was posted on - Wednesday, November 01, 2000 at 23:37:17 (EST)
1,775.) Mrs D Nugent's question is
What foods contain protein and fats but no carbohydrates
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Was posted on - Wednesday, November 01, 2000 at 04:55:43 (EST)
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I hope I can get some help here.
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Was posted on - Wednesday, November 01, 2000 at 02:04:50 (EST)
1,767.) manjit kaur's question is
I am trying to measure the bitterness of beer and look at the fluorescence.Please help!!!!
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Was posted on - Tuesday, October 31, 2000 at 12:58:16 (EST)
1,761.) bastian bartels's question is
a.s.a.p.
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Was posted on - Saturday, October 28, 2000 at 19:21:29 (EDT)
1,756.) Sonja James's question is
Many Thanks
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Was posted on - Friday, October 27, 2000 at 17:12:05 (EDT)
1,748.) Amandeep's question is
i need to no more avout electronic configuration and the atomic structure, can u help? can i have some examples please?
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Was posted on - Friday, October 27, 2000 at 07:00:57 (EDT)
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I really need help on this question and this site i think will help me alot
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Was posted on - Thursday, October 26, 2000 at 20:06:33 (EDT)
1,744.) bodee's question is
how many g citric acid in 1 l of 0.35 N citric acid?
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Was posted on - Thursday, October 26, 2000 at 17:15:10 (EDT)
1,741.) twyla mills's question is
what is the cost of titanium?
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Was posted on - Thursday, October 26, 2000 at 09:34:34 (EDT)
1,735.) Kevin Masten's question is
Thanks
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Was posted on - Wednesday, October 25, 2000 at 13:01:35 (EDT)
1,732.) Debra Xavier's question is
What chemical composition is HC2H3O2?
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Was posted on - Tuesday, October 24, 2000 at 18:09:33 (EDT)
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I am looking for a procedure on how to analyze a compact disc. Can anyone help me?
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Was posted on - Tuesday, October 24, 2000 at 12:00:10 (EDT)
1,725.) john's question is
Does anyone know who invented the Periodic Table?
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Was posted on - Monday, October 23, 2000 at 15:47:04 (EDT)
1,722.) Kayla's question is
Please help me!
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Was posted on - Sunday, October 22, 2000 at 19:28:45 (EDT)
1,714.) deidre''s question is
needs more info on periodic table such as pictures of the elements
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Was posted on - Thursday, October 19, 2000 at 21:59:10 (EDT)
1,710.) Khurram Mumtaz Azim's question is
Dear Sir!
i m a student of college . My prob is that i m trying to find info on Contact Process on the manufacture of Sulphuric Acid.
but unfortunately i couldn`t find it on net
so plz try send me info on Contact Process (industrial preparation of Sulphruic Acid) as soon as possible.
urs sincerely
K.M.A.
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Was posted on - Thursday, October 19, 2000 at 08:17:08 (EDT)
1,706.) Laura Randall's question is
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Was posted on - Wednesday, October 18, 2000 at 18:57:46 (EDT)
1,700.) Joanne Carpenter's question is
Work in R&D for a company the sells water test kits. We have a customer that needs to measure and distingush thiosulfate and trithiosulfate in a wastewater.
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Was posted on - Wednesday, October 18, 2000 at 08:48:54 (EDT)
1,697.) Scott Smith's question is
I could use all the help I can get.
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Was posted on - Tuesday, October 17, 2000 at 20:57:20 (EDT)
1,695.) kirstie's question is
I was wondering if anyone could give me a definition for the following terms: specialty chemicals, fine chemicals, and commodity chemicals. I've been searching for ages, please help!
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Was posted on - Tuesday, October 17, 2000 at 12:20:47 (EDT)
1,692.) Skidz Man's question is
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Was posted on - Tuesday, October 17, 2000 at 07:59:54 (EDT)
1,689.) barry skipp's question is
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Was posted on - Monday, October 16, 2000 at 23:03:45 (EDT)
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Was posted on - Monday, October 16, 2000 at 16:33:52 (EDT)
1,680.) Sarah Mitchell's question is
I like this site. It is very informative.
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Was posted on - Sunday, October 15, 2000 at 16:37:33 (EDT)
1,677.) Ann's question is
What is the triple point of water?
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Was posted on - Sunday, October 15, 2000 at 13:35:53 (EDT)
1,673.) Laura Murray's question is
Great site - hope some one can help me!
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Was posted on - Sunday, October 15, 2000 at 13:25:42 (EDT)
1,671.) David Rickard's question is
When looking at a mass spectrum for a particular element, it seems to me that if the spectrum has two peaks that differ by more than one amu, with no peak between them, that there MUST be an isotope of that element which would coincide with the intermediate value, but the abundance of that isotope (or of the ions which are formed)is too low to be detected by the particular spectrometer. I've looked for a concept to help me understand this, to no avail. Please help--Thank You.
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Was posted on - Sunday, October 15, 2000 at 10:54:36 (EDT)
1,668.) David Rickard's question is
I'm taking a general chem course through a distance learning program. One drawback is the limited contact with professor and classmates. This service is a great idea.
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Was posted on - Sunday, October 15, 2000 at 10:40:55 (EDT)
1,660.) Katrina Erickson's question is
You take an aspirin tablet ( a compound consisting solely of carbon, hydrogen, and oxygen) with a mass of 1.00 g, burn it in air, and collect 2.20 g of carbon dioxide and 0.400 g of water. The molar mass of aspirin is between 170 and 190 g/mol. What is the molecular formula for aspirin?
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Was posted on - Saturday, October 14, 2000 at 18:31:45 (EDT)
1,658.) Mauia's question is
Why is the triangle used as a symbol of heat in a chemical equation?
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Was posted on - Saturday, October 14, 2000 at 18:22:21 (EDT)
1,656.) Maria's question is
very useful
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Was posted on - Saturday, October 14, 2000 at 18:19:10 (EDT)
1,652.) Susan Williams's question is
What is the density of Naptha?
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Was posted on - Thursday, October 12, 2000 at 15:04:20 (EDT)
1,649.) melissa's question is
why do jeans fade?
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Was posted on - Wednesday, October 11, 2000 at 22:10:59 (EDT)
1,647.) Richard E. Moore's question is
I am trying to ajust the pH of a solution form 7.0 to 8.5 - 9.0 and remain organic. I have tryed sodium bicarbonate and found the quanity to rase the pH was unacceptable. I also could only raise the pH to 8.3. Remember the final solution must remain organic. Thanks R.E.Moore
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Was posted on - Wednesday, October 11, 2000 at 11:04:55 (EDT)
1,644.) Daniel Zbinden's question is
What kind of resins or polymers or plasticizers or any other additives can be melted with paraffin wax to obtain a relatively more flexible wax blend.
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Was posted on - Wednesday, October 11, 2000 at 06:55:08 (EDT)
1,641.) Mahendra Bir Singh's question is
I want to know the precautions to be followed for using pottasium cynide.
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Was posted on - Tuesday, October 10, 2000 at 03:24:44 (EDT)
1,639.) Mahendra Bir Singh's question is
Making of golddust or gold ink from real gold for painting.
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Was posted on - Tuesday, October 10, 2000 at 03:16:02 (EDT)
1,635.) anonymous's question is
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Was posted on - Monday, October 09, 2000 at 20:58:57 (EDT)
1,631.) cris's question is
i need the melting point of aspirin?
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Was posted on - Sunday, October 08, 2000 at 16:47:53 (EDT)
1,627.) geethakb's question is
Is there a way of measuring "rusting of iron" quantitatively
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Was posted on - Friday, October 06, 2000 at 10:20:18 (EDT)
1,625.) Phil Granath's question is
What does triethyleneglycol (TEG) degregate to under excess heat?
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Was posted on - Thursday, October 05, 2000 at 23:16:49 (EDT)
1,623.) Phil Granath's question is
Thanks for the help!
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Was posted on - Thursday, October 05, 2000 at 23:14:53 (EDT)
1,620.) craig's question is
What is the proccess for turning o2 (oxygen2)into o3, that being ozone gas
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Was posted on - Thursday, October 05, 2000 at 22:37:20 (EDT)
1,617.) kaz's question is
hi, how does a partialy filled d sub shell make a transition metal a good catalyst and how does the oxidation states effect their catalytic abilities?
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Was posted on - Thursday, October 05, 2000 at 12:30:04 (EDT)
1,615.) Kaz's question is
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Was posted on - Thursday, October 05, 2000 at 12:26:10 (EDT)
1,613.) Vinumoan K. Mathew's question is
How do you calculate the bond order of a Boron triflouride molecule?
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Was posted on - Thursday, October 05, 2000 at 12:02:11 (EDT)
1,612.) Vinumoan K. Mathew's question is
I am using this site for the first time and i don't what comment I am supposed to make.
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Was posted on - Thursday, October 05, 2000 at 11:59:48 (EDT)
1,606.) Stijn Hommes's question is
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Was posted on - Thursday, October 05, 2000 at 03:31:13 (EDT)
1,603.) Lucia's question is
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Was posted on - Wednesday, October 04, 2000 at 04:46:30 (EDT)
1,595.) Nick's question is
What is involved in turning H20 into H2o2
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Was posted on - Monday, October 02, 2000 at 10:26:23 (EDT)
1,589.) brandi's question is
I hope this will help so that i can understand lab better
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Was posted on - Sunday, October 01, 2000 at 15:35:27 (EDT)
1,586.) lindsay's question is
Can I test the authenticity of an opal by seeing if it will or will not dissolve in different liquids?
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Was posted on - Sunday, October 01, 2000 at 14:46:59 (EDT)
1,585.) lindsay's question is
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Was posted on - Sunday, October 01, 2000 at 14:46:07 (EDT)
1,582.) kush's question is
hi
i would like to know that what metal can be placed in contact with carbon at a high temperature of about 1000-1500 degrees centigrade.
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Was posted on - Saturday, September 30, 2000 at 14:57:49 (EDT)
1,581.) kush's question is
hi
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Was posted on - Saturday, September 30, 2000 at 14:55:53 (EDT)
1,577.) MARIO 's question is
HOW MANY MOLES OF ALUMINUM ARE IN 6 GRAMS OF ALUMINUM?
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Was posted on - Friday, September 29, 2000 at 16:49:29 (EDT)
1,573.) MARIO PINTO's question is
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Was posted on - Friday, September 29, 2000 at 16:41:39 (EDT)
1,570.) nailpro23's question is
how can i get information about finding someone to create an acrylic monymer and polymer for artificial nails?
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Was posted on - Friday, September 29, 2000 at 12:24:16 (EDT)
1,567.) Jo's question is
Why is it that why in an esterification reaction, sulfuric acid (concentrated) is used as a dehydrating agent whereas in a hydration reaction, sulfuric acid (dilute) as a catalyst? How can sulfuric acid take part in one reaction to remove water and in another reaction, to "add" water?
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Was posted on - Thursday, September 28, 2000 at 22:43:41 (EDT)
1,565.) Annette St.Clair's question is
Could someone explain how Helium 3 isotopes are used to create fusion energy? I am writing a paper for an Advanced English Compostion course and I need to explain this in laymans terms.
Thanks, Annette
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Was posted on - Thursday, September 28, 2000 at 20:23:26 (EDT)
1,561.) dom's question is
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Was posted on - Wednesday, September 27, 2000 at 13:59:37 (EDT)
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Was posted on - Wednesday, September 27, 2000 at 13:35:56 (EDT)
1,546.) rozi's question is
i dunno...the sites good...but plz help me with this!! why do hydrochloric acid and magnesium react?
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Was posted on - Sunday, September 24, 2000 at 10:00:37 (EDT)
1,545.) rozi's question is
i dunno...the sites good...but plz help me with this!!
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Was posted on - Sunday, September 24, 2000 at 09:59:26 (EDT)
1,542.) Kelly's question is
What are the formulas for the compounds: Manganese Sulfate, Sodium Bicarbonate, Copper Sulfate, Potassium bromate, and Cobalt Carbonate??
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Was posted on - Friday, September 22, 2000 at 21:12:13 (EDT)
1,537.) elsa borrell garcia's question is
I'd like to know if the transmetallation of a bromorganozinc reagent derived from an bromo propargyl inner, in a complexe of palladium result an allene or a propargyl conpound, once reductive-elimination
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Was posted on - Friday, September 22, 2000 at 11:20:30 (EDT)
1,531.) balaji's question is
It is a long standing question of mine which i would really like to know more about, I couldnt elict a response from any of my teachers'
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Was posted on - Thursday, September 21, 2000 at 15:59:21 (EDT)
1,524.) Alison Johnson's question is
I would like to dissovle calcium carbonate and calcium citrate, and I am not sure what chemical I would use to do this, could anyone help me with this?
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Was posted on - Monday, September 18, 2000 at 12:00:23 (EDT)
1,522.) Alison Johnson's question is
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Was posted on - Monday, September 18, 2000 at 11:58:14 (EDT)
1,520.) ryaan's question is
ryan
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Was posted on - Sunday, September 17, 2000 at 17:36:33 (EDT)
1,518.) Alice Marsh's question is
I think the replies need to be quicker
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Was posted on - Sunday, September 17, 2000 at 09:47:16 (EDT)
1,516.) Varray Surekha's question is
The query helps me out to sort out some of my experments
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Was posted on - Sunday, September 17, 2000 at 00:29:17 (EDT)
1,513.) R. O'Hare's question is
What liquids are both Colloidal Silicon Dioxide, and Microcrystalline Cellulose, both soluble/insoluble in?
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Was posted on - Saturday, September 16, 2000 at 15:16:22 (EDT)
1,511.) R. O'Hare's question is
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Was posted on - Saturday, September 16, 2000 at 09:24:50 (EDT)
1,507.) John Williams's question is
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Was posted on - Thursday, September 14, 2000 at 00:08:24 (EDT)
1,505.) Matthew Hamilton's question is
Nice site
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Was posted on - Wednesday, September 13, 2000 at 22:08:53 (EDT)
1,502.) Jason Gordon's question is
I have asked a question regarding natural gas burning. I hope I get some leads.
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Was posted on - Wednesday, September 13, 2000 at 15:13:51 (EDT)
1,499.) Amy's question is
hopefully you can help me with my problem thanks
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Was posted on - Tuesday, September 12, 2000 at 18:50:49 (EDT)
1,497.) DAN KORMA's question is
how much does one cubic foot of osmium weigh?(in kg) and one cubic inch? i am researching the name for use in a company, and don't know much about chemistry thanks
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Was posted on - Tuesday, September 12, 2000 at 08:28:07 (EDT)
1,496.) DAN KORMA's question is
this site looks good
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Was posted on - Tuesday, September 12, 2000 at 08:25:58 (EDT)
1,494.) Misty's question is
I want to make a 1:10 (ml) solution. Should I take 1ml and add it to 9ml for a total of 10ml? Or, should I take 1ml and add it to 10ml?
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Was posted on - Monday, September 11, 2000 at 23:12:29 (EDT)
1,491.) jordan's question is
I would really appreciate it if anyone could help me with the following problems. thank you
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Was posted on - Monday, September 11, 2000 at 19:35:31 (EDT)
1,489.) J. Boss's question is
What is the method to prepare copper carbonate?
Please advise.
Thanks
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Was posted on - Monday, September 11, 2000 at 06:50:10 (EDT)
1,485.) Jamie's question is
I hate science
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Was posted on - Sunday, September 10, 2000 at 18:05:25 (EDT)
1,482.) Brandon's question is
I am trying to find a chemist that specializes in plastics and scent formulation. Any ideas on where to locate such an individual?
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Was posted on - Saturday, September 09, 2000 at 11:10:24 (EDT)
1,480.) Sarah Sawyers's question is
Please help me find the answers to these questions!
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Was posted on - Friday, September 08, 2000 at 09:14:13 (EDT)
1,477.) bill johnston's question is
Who is the most important chemist?
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Was posted on - Friday, September 08, 2000 at 06:51:33 (EDT)
1,475.) F. Hadad's question is
what is the simplest method to prepare Karl fisher reagent
Thanks
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Was posted on - Thursday, September 07, 2000 at 17:58:44 (EDT)
1,472.) Gabriel's question is
Which method is suitable to measure iodide in the presence
iodine? This method must be practical to mesure iodide concentration
of large number of sample.
Thank you
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Was posted on - Thursday, September 07, 2000 at 11:10:59 (EDT)
1,470.) Gabriel's question is
Working on a project to determine iodide concentration.
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Was posted on - Thursday, September 07, 2000 at 11:04:27 (EDT)
1,467.) Angie's question is
Chemistry rocks!
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Was posted on - Thursday, September 07, 2000 at 01:52:39 (EDT)
1,465.) Anna Merryman's question is
Please explain how to calculate the geonormal mass from isotopic masses and relative abundance
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Was posted on - Tuesday, September 05, 2000 at 12:52:28 (EDT)
1,462.) Robert Coniglio's question is
What is the proper chemical name for the store bought variety of mineral oil?
What agent , if any , can be used to thin out mineral oil?
Are mineral oils availble in varying viscosities?
Than you
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Was posted on - Tuesday, September 05, 2000 at 03:33:41 (EDT)
1,461.) Robert Coniglio's question is
What is the proper chemical name for the store bought variety of mineral oil?
What agent , if any , can be used to thin out mineral oil?
Are mineral oils availble in varying viscosities?
Than you
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Was posted on - Tuesday, September 05, 2000 at 03:31:26 (EDT)
1,459.) Kim Bernat 's question is
How do I know where to write the elements when writing Lewis Structures? Also how do I know when to use multiple covalent bonds or when to just write in the appropriate number of dots?
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Was posted on - Thursday, August 31, 2000 at 22:44:18 (EDT)
1,454.) Rae Le cain's question is
What liquid cannot be frozen?
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Was posted on - Monday, August 28, 2000 at 23:33:17 (EDT)
1,452.) Rae Lecain's question is
Have bookmarked this on for future use. Thanks
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Was posted on - Monday, August 28, 2000 at 23:30:29 (EDT)
1,450.) Fawzy Adel's question is
what is the best method to prepare Ammonium spirit
Thanks
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Was posted on - Monday, August 28, 2000 at 15:20:39 (EDT)
1,441.) Bri's question is
Thanks for answering my question.
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Was posted on - Saturday, August 26, 2000 at 21:53:22 (EDT)
1,439.) Harvey Maxwell's question is
what would happen if alum is mixed with sodium bromide or sodium hypocholrite. bromine reacts violetly with aluminum what effect would the sulfate have on the reaction with bromine
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Was posted on - Thursday, August 24, 2000 at 21:49:09 (EDT)
1,437.) Mary's question is
every reference keeps saying that pH changes with temperature, but HOW does it change with temperature? Is there a way to do conversions to align measurements taken at different temperatures?
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Was posted on - Thursday, August 24, 2000 at 11:33:05 (EDT)
1,435.) Michelle's question is
Hello! I need to ask a question that I have always wondered about. Who discovered carbon? Just curious. I know that life would not exist without carbon. Thankx! Bye!
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Was posted on - Wednesday, August 23, 2000 at 21:40:11 (EDT)
1,433.) KIRANKUMAR SHAH's question is
DEAR SIR,
PL GIVE ME THE DETAIL ON PHOTOGRAPHY CHEMICAL.LIKE NAMES,TECHNICAL DETAIL.INTERNATIONAL MANUFACTURERS,CAS NO,MSDS,
KIRANKUMAR SHAH
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Was posted on - Wednesday, August 23, 2000 at 10:01:14 (EDT)
1,432.) KIRANKUMAR SHAH's question is
DEAR SIR,
PL GIVE ME THE DETAIL ON TECHNICAL GRADE PESTICIDE LAW ALL INTERNATIONLITRNATIONL LAW BECAUSE IN INDIA TECHNICAL GRADE PESTICIDE MANUFACTURERS HAD MISDECALERED IN INDIAN CENTREL EX. AND CUSTOM LAWS IF YOU HAVE ANY BODY OR ANY OTHER LAW WHICH CAN TAKE NECESSARY ACTION .
WHOM SHOULD I COMPLAIN PL.SUGGEST.
sahastra@bom5.vsnl.net.in
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Was posted on - Wednesday, August 23, 2000 at 09:43:02 (EDT)
1,427.) Ian Mclaren's question is
Why are Kc values only affected by changes in temperature but not concentratio0n or pressure?
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Was posted on - Wednesday, August 23, 2000 at 00:25:24 (EDT)
1,424.) Ruth John's question is
how ar isotopes used in medince and research also power production and construction? What are radioisotopes?
what are stable and unstable isotopes?
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Was posted on - Monday, August 21, 2000 at 18:01:47 (EDT)
1,420.) Jimmy Blankenship's question is
Working on fungal secondary metabolism
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Was posted on - Monday, August 21, 2000 at 09:47:55 (EDT)
1,417.) Assem Shawally's question is
I just ask how I can prepare a pure samples of the following:
1-Perchloric acid
2-Lead acetate via Lead nitrate
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Was posted on - Monday, August 21, 2000 at 08:57:20 (EDT)
1,414.) jennifer Olson's question is
what is the general compound name of a -"dione"
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Was posted on - Saturday, August 19, 2000 at 18:39:14 (EDT)
1,413.) jennifer Olson's question is
no comments
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Was posted on - Saturday, August 19, 2000 at 18:38:22 (EDT)
1,410.) Laura's question is
Is the abundance of helium on earth decreasing? If so, what are the implications?
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Was posted on - Saturday, August 19, 2000 at 11:18:15 (EDT)
1,408.) trev's question is
Can someone please explain to me why diamond has a lower melting and boiling point than graphite
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Was posted on - Saturday, August 19, 2000 at 07:48:48 (EDT)
1,404.) marguerite's question is
I have prepared 1:10 dilutions, but I am stumped as to how to prepare a to 1:20,000 dilution. I would like to complete this task without doing a serial dilution.
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Was posted on - Friday, August 18, 2000 at 05:49:05 (EDT)
1,401.) Kristen's question is
I need to use this site to find out info
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Was posted on - Thursday, August 17, 2000 at 09:38:58 (EDT)
1,398.) Harvey maxwell's question is
Thanks Matt & Donald I understand the MSDS on Bromine better hmax(at)bellsouth.net If you don't see the red bromine ion How would you know not to drink the water.I know it would be salty but I am not going taste this water.
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Was posted on - Thursday, August 17, 2000 at 01:42:02 (EDT)
1,395.) keff's question is
wow.,.what a wonderful place to learn
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Was posted on - Tuesday, August 15, 2000 at 11:56:46 (EDT)
1,392.) Josh's question is
oops sorry about that last one, but my question is 'what is the exact definition of an element'
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Was posted on - Sunday, August 13, 2000 at 14:59:36 (EDT)
1,391.) Josh's question is
Whats up this is a good site
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Was posted on - Sunday, August 13, 2000 at 14:58:55 (EDT)
1,389.) Harvey Maxwell's question is
while activating sodium bromide with sodium hypochlorite I got a pink foam that settled to a red liquid. Dilution water cleared up the color. At what ppm does the red bromine ion become visible. What ppm does this water become safe to drink. It's sister chemical chlorine is safe to drink at about 5ppm.
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Was posted on - Sunday, August 13, 2000 at 13:06:41 (EDT)
1,386.) Harvey maxwell's question is
Very good site
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Was posted on - Sunday, August 13, 2000 at 12:23:56 (EDT)
1,383.) Dusty J's question is
What is quantitative analysis?
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Was posted on - Saturday, August 12, 2000 at 16:43:16 (EDT)
1,381.) d's question is
?
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Was posted on - Saturday, August 12, 2000 at 16:41:54 (EDT)
1,375.) Dusty's question is
good site
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Was posted on - Saturday, August 12, 2000 at 16:35:53 (EDT)
1,373.) Harvey Maxwell's question is
How much bromide can one consume from fruit and other natural sorces before haveing cronic symtoms
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Was posted on - Friday, August 11, 2000 at 13:42:41 (EDT)
1,371.) Laura J's question is
How does liquid detergent work to break down fats?
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Was posted on - Tuesday, August 08, 2000 at 19:46:47 (EDT)
1,369.) Laura J's question is
I'm a 1st year chemistry teacher.
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Was posted on - Tuesday, August 08, 2000 at 19:44:17 (EDT)
1,365.) Karen's question is
Just after information.
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Was posted on - Saturday, August 05, 2000 at 04:17:26 (EDT)
1,363.) alexa ray fernando's question is
how does chemistry affects our daily life?
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Was posted on - Friday, August 04, 2000 at 07:07:03 (EDT)
1,362.) alexa ray fernando's question is
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Was posted on - Friday, August 04, 2000 at 07:05:13 (EDT)
1,360.) Steve Tregilgas's question is
This is a good service.
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Was posted on - Thursday, August 03, 2000 at 17:39:44 (EDT)
1,357.) Amanda's question is
a
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Was posted on - Thursday, August 03, 2000 at 11:42:06 (EDT)
1,353.) Diane Pernice's question is
We have a pro-collagen skin creme that has denatured and is showing some fiber-like strands of pro-collagen in it.
What chemicals can cause this ?
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Was posted on - Monday, July 31, 2000 at 10:31:57 (EDT)
1,351.) A.Sailaja's question is
I am visiting this site for the first time. So may be I will be able to offer a comment the next time
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Was posted on - Sunday, July 30, 2000 at 15:54:23 (EDT)
1,347.) K Wynd's question is
To anyone who can help,
My name is Kathleen Wynd and I am a researcher for a publishing company (www.quebec-amerique.com). We are doing an encyclopedia on sciences and I would need some help finding certain images or information about chemical reactions.
I would need molecular models of certain chemical reactions : displacement, double displacement, exothermic, endothermic, redox and iron oxidation. I would like to know where I can find what I am looking for. In books they only show what the reaction does but not at the molecular models.
A quick response would be appreciated. Thank you for your time and for taking this request seriously.
Kathleen Wynd
Researcher
Québec Amérique International
329, de la Commune Ouest, 3e étage
Montréal, Qc
H2Y 2E1
Canada
tel : 514-499-3000
fax : 514-499-3010
kwynd@hotmail.com
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Was posted on - Thursday, July 27, 2000 at 10:47:33 (EDT)
1,345.) Jessie's question is
Once I get my answer I will be happy but I do like the way things are set up here
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Was posted on - Wednesday, July 26, 2000 at 14:44:30 (EDT)
1,343.) Lima's question is
What is percent yield, actual yield and theorical yield. Examples of each please
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Was posted on - Wednesday, July 26, 2000 at 02:08:58 (EDT)
1,341.) Hortensia's question is
ASAP
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Was posted on - Wednesday, July 26, 2000 at 02:04:24 (EDT)
1,339.) nuje's question is
no...
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Was posted on - Tuesday, July 25, 2000 at 11:55:46 (EDT)
1,336.) Dennis Livingston's question is
How do you estimate the physical properties of acid mixtures? For example, how would you estimate the viscosity of a 10% HF, 20% HCl, 7% H3PO4 mixture?
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Was posted on - Monday, July 24, 2000 at 11:47:26 (EDT)
1,329.) Mark's question is
How can you work out how many grams of NaCl are in a solution when the solution is only described as 7% ? I have 4 ml of 7% saline, and I need to work out how many grams of NaCl are in it. All I have found so far is that the assay shows there is 1200mmol/litre of Chloride in it, so I presume the same amount of Na+. I guess this means there is 4.8 mmol. But how much does the total Na + Cl weigh ?
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Was posted on - Monday, July 24, 2000 at 07:16:09 (EDT)
1,324.) Mark Hinchey's question is
What is the significance of hydrogen when considering the properties of acids
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Was posted on - Friday, July 21, 2000 at 04:26:20 (EDT)
1,322.) Angie's question is
what are the factors that influence the number of isomers possible?
thanks, ^_^
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Was posted on - Thursday, July 20, 2000 at 01:18:36 (EDT)
1,318.) angie's question is
this is easy to use
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Was posted on - Thursday, July 20, 2000 at 01:13:27 (EDT)
1,310.) BRAD T. MILLER's question is
FUSING ALUMINA WITH SODIUM CARBONATE TO PRODUCE SODIUM ALUMINATE. CAN ANYONE DESCRIBE THE PROCESS TO DO THIS?
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Was posted on - Monday, July 17, 2000 at 12:55:38 (EDT)
1,306.) maleka's question is
My teacher says there are 4 elements in the Periodic Table that are name for EXACTLY the same thing. Do you know what these elements are? Thanks...
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Was posted on - Tuesday, July 11, 2000 at 16:36:18 (EDT)
1,303.) Rosy's question is
Thanks for the page, it seems like it's going to be very helpful.
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Was posted on - Tuesday, July 11, 2000 at 04:07:08 (EDT)
1,298.) sunyang21's question is
please help me to answer the question!
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Was posted on - Monday, July 10, 2000 at 23:19:14 (EDT)
1,295.) Rick Fuehrer's question is
At what temperature does sodium cloride melt?
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Was posted on - Monday, July 10, 2000 at 21:04:23 (EDT)
1,292.) Rick Fuehrer's question is
I like the site.
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Was posted on - Monday, July 10, 2000 at 21:01:15 (EDT)
1,289.) jee's question is
We are looking for the " Zinc & Titatinum Failuer Report
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Was posted on - Sunday, July 09, 2000 at 22:09:27 (EDT)
1,287.) kevin rogers's question is
I would like to know the balanced equation of potassium dichromate with an alcohol.
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Was posted on - Saturday, July 08, 2000 at 13:13:32 (EDT)
1,282.) Sonya's question is
Why is potassium more reactive than calcium, sodium and lithium?
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Was posted on - Sunday, July 02, 2000 at 07:18:40 (EDT)
1,280.) Sonya Brown's question is
Great site, really helpful.
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Was posted on - Sunday, July 02, 2000 at 07:13:38 (EDT)
1,278.) dw's question is
Thanks for a great site
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Was posted on - Friday, June 30, 2000 at 11:50:42 (EDT)
1,275.) Gili's question is
Is thre an aging process between acetycholinesterase and nerve gases... if Yes is it irrevrsable or can it be reversed after a certain period of time?
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Was posted on - Wednesday, June 28, 2000 at 17:40:19 (EDT)
1,274.) Gili's question is
Please answer my question.
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Was posted on - Wednesday, June 28, 2000 at 17:38:28 (EDT)
1,270.) Steven Glenn's question is
What is the equation that describes the reaction of eggshells dissolving in vineager? I figure it's CaCO3(for calcium carbonate) + CH3COOH (vineager) > CO2 (gas bubbles) but don't know what else or the numbers involved in balancing it.
Thanks
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Was posted on - Wednesday, June 28, 2000 at 17:02:23 (EDT)
1,268.) Nicki kelly's question is
thank u for helping me!
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Was posted on - Tuesday, June 27, 2000 at 17:15:28 (EDT)
1,263.) Antonio's question is
does anyone knows how ethylenediamine reacts with metal-oxides?
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Was posted on - Sunday, June 25, 2000 at 11:17:21 (EDT)
1,260.) Joanne S. Confesor's question is
Actually I have none.
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Was posted on - Saturday, June 24, 2000 at 00:25:00 (EDT)
1,257.) jayme mathes's question is
What would happen if i mix nitrogen with juices from a bee
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Was posted on - Friday, June 23, 2000 at 22:33:35 (EDT)
1,255.) Jayme Mathes's question is
Where online can I try experiences,computerized,.Say like when i miz two things togather, It would show and tell me what happens?
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Was posted on - Friday, June 23, 2000 at 22:27:17 (EDT)
1,253.) saketh's question is
I am trying to dye (blacken) organic matter ( feather, wool ) etc. with
silver nitrate, with subsequent exposure to sunlight. Do I use an alkaline
or acidic medium for aqueous silver nitrate solution, in which these
organic materials will be dipped and then removed and exposed to sunlight.
Is an acidic or alkaline medium suitable for this reaction chemistry.
thank you.
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Was posted on - Friday, June 23, 2000 at 11:19:47 (EDT)
1,251.) Graham Chapman's question is
Excellent site! Keep up the good work!
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Was posted on - Thursday, June 22, 2000 at 15:25:42 (EDT)
1,249.) Jean Edouard's question is
How to metallize polyamide (nylon plastic) with copper or silver, using an electroless method ?
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Was posted on - Thursday, June 22, 2000 at 07:22:10 (EDT)
1,248.) Jean Edouard's question is
Excellent site, friendly, powerfull, in all
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Was posted on - Thursday, June 22, 2000 at 07:20:45 (EDT)
1,246.) Gurpreet Rana's question is
What are some good chemistry study guides
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Was posted on - Thursday, June 22, 2000 at 07:17:37 (EDT)
1,243.) ricky's question is
there is a household product which is jelly-like fluid in a pack. this pack can put into the frigde for a certain time and it is used to keep the food cold when outing. it can recycle use when it comes back to room temperature.
what is the chemistry inside and what is the component actually? i want to make it meself, possible?
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Was posted on - Tuesday, June 20, 2000 at 23:05:07 (EDT)
1,240.) ricky's question is
good
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Was posted on - Tuesday, June 20, 2000 at 22:53:21 (EDT)
1,237.) mandar ghag's question is
so far so good
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Was posted on - Tuesday, June 20, 2000 at 01:11:10 (EDT)
1,234.) j fernandopulle's question is
what is phenyl phenol and what are its applications
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Was posted on - Monday, June 19, 2000 at 23:04:05 (EDT)
1,230.) Peter Bevan's question is
Thanks!
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Was posted on - Monday, June 19, 2000 at 14:31:59 (EDT)
1,227.) jennifer prileson's question is
Can anyone suggest safe ways to have my chemistry students (1) make their own fireworks and sparklers (so they can test flame colors and combustion reactions) and/or (2) test different rocket fuels, such as the ones from the book October Sky? We don't want anyone blowing themselves up, but we also know how much kids love to do and see these kinds of rapid oxidation reactions.
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Was posted on - Sunday, June 18, 2000 at 16:14:55 (EDT)
1,225.) Jennifer Prileson's question is
My chemistry colleagues and I are trying to develop a qualitative analysis unit to get students to identify wines from around the world/country by looking for specific anions and cations in real or simulated samples. We need to have real data but can't seem to locate this information. Does anyone out there have the necessary background information to share with us, or have alternative ideas? (Please keep in mind these are intro. chem students,mostly sophomores.)
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Was posted on - Sunday, June 18, 2000 at 15:52:01 (EDT)
1,222.) Alpha guy's question is
I have a project to dry an enclosed container which is full of sand- no drains available. I can't replace the sand for economical reasons. I am proposing the use of N2- Can any one help? Thanks.
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Was posted on - Sunday, June 18, 2000 at 13:14:30 (EDT)
1,218.) detlef's question is
-
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Was posted on - Wednesday, June 14, 2000 at 02:26:52 (EDT)
1,214.) Al Hambley's question is
I would like information on exposure to cadmium i.e. web sites, contact people, journals etc. Any information like this is greatly appreciated. Thanks
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Was posted on - Wednesday, June 07, 2000 at 13:13:30 (EDT)
1,212.) Al Hambley's question is
Howdy
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Was posted on - Wednesday, June 07, 2000 at 13:08:59 (EDT)
1,209.) Phil's question is
What is the likely effect of hydrogen gas on phosphates at a temperature of ~1000C
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Was posted on - Monday, June 05, 2000 at 08:57:05 (EDT)
1,207.) Gurra Bers's question is
Why does a 3 % NaCl(aq) solution (salt water) rust more than a saturated
NaCl(aq) solution?
And why does a 3 % NaCl solution rust more than a 3 % NaCl + 0.5 % NaNO2
solution?
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Was posted on - Sunday, June 04, 2000 at 23:35:52 (EDT)
1,205.) Garth's question is
Is the speed of light constant?
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Was posted on - Sunday, June 04, 2000 at 23:21:53 (EDT)
1,202.) Garth's question is
just wondering about the speed of light, good site....
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Was posted on - Sunday, June 04, 2000 at 23:20:40 (EDT)
1,199.) ET's question is
cool site
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Was posted on - Wednesday, May 31, 2000 at 23:50:08 (EDT)
1,192.) Andy 's question is
I am trying to built a rocket that will fly about 60 miles up...I can't use the normal fuel of Liquid O2 and Liquid H2 and the normal fuel of Liquid O2 and C12H26....can anyone help me come up with an alternative fuel...thanks...you can email me at Smiley21481@aol.com.....Put Rocket Fuel as the subject....thanks.
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Was posted on - Tuesday, May 30, 2000 at 22:00:49 (EDT)
1,190.) Andy's question is
Hi
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Was posted on - Tuesday, May 30, 2000 at 21:41:13 (EDT)
1,181.) German Vargas's question is
How do you make 1N HCL
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Was posted on - Monday, May 29, 2000 at 06:26:51 (EDT)
1,178.) Rich Moore's question is
I'm preparing deer hides for tanning. The dehairing step requires treatment with horticultural lime (Calcium Hydroxide). After the hair is removed, the hide needs to be treated with ammonium sulfate to deactivate the lime. What is the chemistry going on here,and can any other chemical be used instaed of ammonium sulfate?
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Was posted on - Sunday, May 28, 2000 at 15:20:49 (EDT)
1,171.) natasha scott's question is
How is it possible to identify 4 unknown solutions?
e.g if four bottles contain solutions of Na2SO4, Na2CO3, HCl and BaCl2 and these were mixed togther, how would it be possible to know which solution is which?
I understand that some mixtures would produce a white precipitate and others would not, but how is it possible to know what each solution is simply from this data.
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Was posted on - Friday, May 26, 2000 at 22:57:16 (EDT)
1,163.) Alex Murphy's question is
I have no comment until I have received an answer to my question.
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Was posted on - Thursday, May 25, 2000 at 06:26:25 (EDT)
1,159.) caroline's question is
hello could you give me an extensive answer on how heat affects the electrolysis of sodium chloride please
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Was posted on - Wednesday, May 24, 2000 at 12:41:48 (EDT)
1,157.) caroline's question is
thankyou
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Was posted on - Wednesday, May 24, 2000 at 12:40:35 (EDT)
1,153.) arwa's question is
Answer my question
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Was posted on - Tuesday, May 23, 2000 at 09:21:50 (EDT)
1,151.) Eric's question is
thanks
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Was posted on - Monday, May 22, 2000 at 20:37:27 (EDT)
1,143.) Christina Alvarez's question is
Nice website!I didn't even know it existed. Hope you can help me with my questions.
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Was posted on - Saturday, May 20, 2000 at 17:07:13 (EDT)
1,141.) jake's question is
how do you balance magnesium metal + oxygen gas-> magnesium oxide
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Was posted on - Friday, May 19, 2000 at 21:03:43 (EDT)
1,140.) jake's question is
n/a
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Was posted on - Friday, May 19, 2000 at 21:01:51 (EDT)
1,136.) Ricci Ristau's question is
I need to know Hydrogen's % by mass of the sun's weight
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Was posted on - Thursday, May 18, 2000 at 17:31:11 (EDT)
1,135.) Ricci Ristau's question is
this seems like a great sight
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Was posted on - Thursday, May 18, 2000 at 17:28:47 (EDT)
1,128.) Victor Claessen's question is
I'm working on a project for my chemistry study
I have to make a report about the recovery of elemental sulphur out
of SO2 (from exhaust gasses). The thing is, I've got no clue
whatsoever what kinda reactions i could use and i've been unable to
find a process on the net.
Do you have any idea where i could find such a process or some
information about the reactions involved to get me starting?
hope anyone can help me.
Vic@chemist.com
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Was posted on - Wednesday, May 17, 2000 at 08:57:37 (EDT)
1,125.) Mark's question is
How do you lower electric conductivity in lye 1.8%?
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Was posted on - Wednesday, May 17, 2000 at 00:08:49 (EDT)
1,123.) kingartemis's question is
nice site
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Was posted on - Tuesday, May 16, 2000 at 17:47:57 (EDT)
1,121.) Regina White's question is
How toxic is tungsten and sodium tunstate and manganous tungstate?
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Was posted on - Tuesday, May 16, 2000 at 13:14:47 (EDT)
1,117.) vikki's question is
what does activation energy, rate constant, rate equation and order of chemical reaction mean?
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Was posted on - Tuesday, May 16, 2000 at 05:49:46 (EDT)
1,115.) tom's question is
help me
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Was posted on - Tuesday, May 16, 2000 at 03:30:58 (EDT)
1,111.) Bill Conlon's question is
What is "sodium dodecyl benzene sulfonate" and what is its use?.
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Was posted on - Monday, May 15, 2000 at 15:04:29 (EDT)
1,109.) MEa's question is
Help! how do i find things like stomach and battery acid?
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Was posted on - Monday, May 15, 2000 at 12:35:55 (EDT)
1,108.) MEa's question is
Help!
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Was posted on - Monday, May 15, 2000 at 12:35:27 (EDT)
1,104.) Sehome's question is
I hate chemistry
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Was posted on - Monday, May 15, 2000 at 11:21:08 (EDT)
1,100.) Matjaz Toplisek's question is
I do not find supplier of carbonyl Nickel,
does somebody know producers for this?
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Was posted on - Monday, May 15, 2000 at 02:03:19 (EDT)
1,098.) dave park's question is
ummm I've searched the web like hundred times and I couldn't find what I wanted or rather needed to find...
so I came here to ask the experts..here it goes...
I'm doing a research on caustic soda(sodium hydroxide) and I need to find its uses, how it is produced, where it is produced and problems with prductions... I need specific specific answers for them please if you can help me please do so.
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Was posted on - Monday, May 15, 2000 at 01:20:09 (EDT)
1,095.) Brenda GIlbertson's question is
When an atom because an ion, what happens to it's size and electrons?