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3,503.) Yelena's question is no comments Click here to check for an answer 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 Click here to check for an answer 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. Click here to check for an answer 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 Click here to check for an answer Was posted on - Saturday, November 23, 2002 at 17:01:41 (EST)
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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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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? Click here to check for an answer 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? Click here to check for an answer 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 Click here to check for an answer 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? Click here to check for an answer Was posted on - Friday, November 15, 2002 at 14:34:24 (EST)
3,445.) mhazzy's question is no comment Click here to check for an answer 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? Click here to check for an answer 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?
Click here to check for an answer Was posted on - Friday, November 01, 2002 at 12:46:48 (EST)
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3,422.) bradely's question is how can i split sault up into its two elements Click here to check for an answer 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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3,418.) tia's question is How many moles are in a can soda. Click here to check for an answer Was posted on - Tuesday, October 22, 2002 at 23:00:42 (EDT)
3,414.) pat's question is chemistry is hard Click here to check for an answer 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 Click here to check for an answer 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? Click here to check for an answer 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 :) Click here to check for an answer 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? Click here to check for an answer 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? Click here to check for an answer 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 Click here to check for an answer Was posted on - Sunday, October 13, 2002 at 13:21:55 (EDT)
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3,384.) M. GHAFOUR's question is PLEASE HELP FIND AN ANSWER FOR THIS QUESTION Click here to check for an answer 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? Click here to check for an answer 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 Click here to check for an answer Was posted on - Wednesday, October 09, 2002 at 20:10:25 (EDT)
3,378.) Marisol's question is good Click here to check for an answer 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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3,358.) Jonathan's question is Names of gases that combine to form solids Click here to check for an answer Was posted on - Sunday, September 29, 2002 at 21:33:39 (EDT)
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3,339.) nida 's question is what is carbon mono oxide and what are its side affect? Click here to check for an answer Was posted on - Sunday, September 22, 2002 at 22:43:25 (EDT)
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3,334.) tamara's question is i ned help Click here to check for an answer 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
Click here to check for an answer 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. Click here to check for an answer Was posted on - Wednesday, September 18, 2002 at 15:58:33 (EDT)
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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? Click here to check for an answer 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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3,310.) Megan's question is I need help with finding what is an atom and what is a molecule...please help me... Click here to check for an answer Was posted on - Monday, September 02, 2002 at 21:48:55 (EDT)
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3,298.) mARLON FRAUSTO's question is Where can I find info from the development of the table of elements Click here to check for an answer Was posted on - Wednesday, August 21, 2002 at 22:06:47 (EDT)
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3,292.) luis 's question is physical science Click here to check for an answer 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?? Click here to check for an answer 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? Click here to check for an answer 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. Click here to check for an answer Was posted on - Tuesday, July 30, 2002 at 13:37:40 (EDT)
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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. Click here to check for an answer 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). Click here to check for an answer 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. Click here to check for an answer Was posted on - Thursday, July 18, 2002 at 09:34:05 (EDT)
3,268.) Ezonarere's question is explain the history of carbon. Click here to check for an answer Was posted on - Saturday, July 06, 2002 at 15:54:19 (EDT)
3,267.) Ezonarere's question is explain the history of carbon. Click here to check for an answer 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 Click here to check for an answer 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 Click here to check for an answer Was posted on - Monday, June 10, 2002 at 05:23:05 (EDT)
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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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3,239.) Cecilia's question is Why the nonmetal has low ionization as go down the group? Click here to check for an answer Was posted on - Friday, May 24, 2002 at 23:12:27 (EDT)
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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? Click here to check for an answer 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 Click here to check for an answer Was posted on - Sunday, May 12, 2002 at 05:28:53 (EDT)
3,211.) Connie's question is When was chemistry called alchemy? Click here to check for an answer 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 Click here to check for an answer 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? Click here to check for an answer Was posted on - Wednesday, May 08, 2002 at 22:00:08 (EDT)
3,200.) Eddie Fausett's question is None at this time. Click here to check for an answer 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 Click here to check for an answer Was posted on - Tuesday, April 30, 2002 at 22:54:43 (EDT)
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3,182.) Erica Griggs's question is Physical Chemistry- Quantum Mechanics
I could really use some help on this one! Click here to check for an answer Was posted on - Sunday, April 21, 2002 at 22:44:01 (EDT)
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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 Click here to check for an answer Was posted on - Tuesday, April 16, 2002 at 14:53:22 (EDT)
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3,153.) Charles Brown's question is Why is NH3 soluble in wter but C6H6 is not Click here to check for an answer Was posted on - Saturday, April 13, 2002 at 00:11:26 (EDT)
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3,144.) Ebony Evans's question is This website is a God send because I sooo need help in chemistry!!! Click here to check for an answer 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? Click here to check for an answer Was posted on - Thursday, April 04, 2002 at 19:23:08 (EST)
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3,130.) christine's question is what is the shape of CH3-? is that a trigonal planar? Click here to check for an answer Was posted on - Thursday, March 28, 2002 at 03:20:14 (EST)
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3,118.) bridgid's question is what are the connections between the periodic table, electron configuration and chemical behavior? Click here to check for an answer Was posted on - Wednesday, March 20, 2002 at 21:23:24 (EST)
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3,105.) Juliet's question is How do you combine formula, such as Sodium and Nitrate? Click here to check for an answer 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 Click here to check for an answer 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! Click here to check for an answer 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. Click here to check for an answer 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? Click here to check for an answer Was posted on - Thursday, March 14, 2002 at 01:07:29 (EST)
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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? Click here to check for an answer Was posted on - Wednesday, March 13, 2002 at 12:18:50 (EST)
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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! Click here to check for an answer 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!!! Click here to check for an answer 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) Click here to check for an answer Was posted on - Sunday, March 03, 2002 at 23:26:08 (EST)
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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? Click here to check for an answer Was posted on - Monday, February 25, 2002 at 11:39:34 (EST)
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... Click here to check for an answer Was posted on - Monday, February 25, 2002 at 11:37:39 (EST)
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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?
Click here to check for an answer 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? Click here to check for an answer Was posted on - Saturday, February 16, 2002 at 19:42:33 (EST)
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3,019.) Ramon Garcia 's question is need help? Click here to check for an answer Was posted on - Tuesday, February 12, 2002 at 21:35:31 (EST)
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?? Click here to check for an answer Was posted on - Monday, February 11, 2002 at 00:11:08 (EST)
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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? Click here to check for an answer Was posted on - Thursday, December 13, 2001 at 20:17:05 (EST)
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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. Click here to check for an answer Was posted on - Sunday, December 09, 2001 at 06:58:08 (EST)
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