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Here are a list of answers

Question number 3,485
An answer to Kathryn's question
This is a cool site. is

This was posted by on
- Saturday, November 23, 2002 at 17:00:55 (EST)

Question number 3,454
An answer to Veranica's question
How do you get from grams to atoms, "passing" through moles, in an equation? is

This was posted by on
- Monday, November 18, 2002 at 17:14:09 (EST)

Question number 3,339
An answer to nida 's question
what is carbon mono oxide and what are its side affect? is

carbon monoxide is the harmful one that makes you pass out

This was posted by bri on
- Friday, November 15, 2002 at 18:21:12 (EST)

Question number 2,702
An answer to Nikki Holloway's question
Acetaminophen is

Tylenol

This was posted by on
- Saturday, November 09, 2002 at 18:58:52 (EST)

Question number 3,268
An answer to Ezonarere's question
explain the history of carbon. is

well our story starts with the creation of the universe...

This was posted by on
- Saturday, November 09, 2002 at 18:54:45 (EST)

Question number 3,310
An answer to Megan's question
I need help with finding what is an atom and what is a molecule...please help me... is

You can find an element on the periodic table. A molecule is a group of atoms stuck together.

This was posted by on
- Saturday, November 09, 2002 at 18:52:31 (EST)

Question number 3,339
An answer to nida 's question
what is carbon mono oxide and what are its side affect? is

Carbon Monoxide (CO) is the product of a cumbustion reaction, but ussually only when there is incomplete cumbustion (meaning there is not enough oxygen provided to the reactant). It is created alongside carbon dioxide, but unlike the inert CO2 it is poisinous to us. It has no smell and cannot be seen, if it is present in a room you will get sleepy, then die in your sleep.

This was posted by on
- Saturday, November 09, 2002 at 18:50:05 (EST)

Question number 3,381
An answer to AJ's question
On the book The Wonderful Flight To The Mushroom Planet, I found the word tetramethylbenzacarbonethylene, What does it means? is

It is an organic compund (carbon based)with a double bond at one end (ene). It has 4 methyl groups (CH2) off of it. Not sure what the carbon is in there for and the benza i'm thinkin should be benzene (ring of carbon atoms) as well there should be numbers showing where the methyl groups are. I think the author was trying to sound smart but was just on a lot of shrooms :P.

This was posted by on
- Saturday, November 09, 2002 at 18:45:13 (EST)

Question number 3,396
An answer to Ashley's question
What household item contains sodium bi-carbonate? is

baking soda

This was posted by on
- Saturday, November 09, 2002 at 18:39:29 (EST)

Question number 3,400
An answer to Noor's question
i would like to know which chemical/substances are soluble and insoluble.. thank u :) is

all of them??

This was posted by on
- Saturday, November 09, 2002 at 18:38:41 (EST)

Question number 3,411
An answer to Kelli Samuel's question
I need info on balancing formulas is

You just have to have the same amount of each element on each side of the formula, not too hard.

This was posted by on
- Saturday, November 09, 2002 at 18:38:00 (EST)

Question number 3,418
An answer to tia's question
How many moles are in a can soda. is

I hope that there aren't any moles in soda, there dirty little rodents. hehe. (If you can find out every compound in a certain soda and tell me what volume of each are in it then I will find out how many moles are in taht soda)

This was posted by on
- Saturday, November 09, 2002 at 18:36:57 (EST)

Question number 3,420
An answer to Bradely's question
i hope i get the answer im looking for is

Is it 4?

This was posted by on
- Saturday, November 09, 2002 at 18:34:18 (EST)

Question number 3,422
An answer to bradely's question
how can i split sault up into its two elements is

Do you mean salt? :P It would take a crap load of energy to break the ionic bonds between sodium and chlorine. And if you did split them (with a crap load of energy) then the element would just combine back into NaCl releasing even more energy.

This was posted by on
- Saturday, November 09, 2002 at 18:31:25 (EST)

Question number 272
An answer to Jack Philby's question
What is the symbol for sodium? is

Na. get a periodic table

This was posted by Afshin on
- Sunday, November 03, 2002 at 13:48:26 (EST)

Question number 283
An answer to Holly's question
Could you please tell me the formula for converting molar mass into grams. is

Molar Mass is in Grams you just have to divide by the number of moles.

This was posted by Afshin on
- Sunday, November 03, 2002 at 13:47:45 (EST)

Question number 304
An answer to The Shadow's question
What is a good web-site for easy to understand definations to Chemistry? is

First you should learn how to spell definitions. not definations.

This was posted by Afshin on
- Sunday, November 03, 2002 at 13:45:52 (EST)

Question number 307
An answer to Becky's question
Would eating Calcium Chloride hurt a person? is

CaCl2 is a salt. It will not hurt.

This was posted by Afshin on
- Sunday, November 03, 2002 at 13:45:21 (EST)

Question number 308
An answer to PAUL's question
WHAT KIND OF THING DOES A CHEMIST DEAL WITH is

ALL SORTS OF SHIT!

This was posted by Afshin on
- Sunday, November 03, 2002 at 13:45:00 (EST)

Question number 3,426
An answer to tasha's question
i like this ideal is

This was posted by C on
- Thursday, October 31, 2002 at 16:46:40 (EST)

Question number 3,426
An answer to tasha's question
i like this ideal is

This was posted by on
- Wednesday, October 30, 2002 at 19:21:59 (EST)

Question number 3,426
An answer to tasha's question
i like this ideal is

Is it possible to seperate hydrogen and oxygen in fluids

This was posted by Paul Burchett on
- Wednesday, October 30, 2002 at 14:39:19 (EST)

Question number 3,407
An answer to mark's question
ARE ALL FOUR HYDROGEN ATOOMS IN C3H4 ARE IN THE SAME PLANE?IF NOT, WHAWT IS THEIER SPATIAL RELATIONSHIP? is

This was posted by on
- Friday, October 18, 2002 at 12:54:56 (EDT)

Question number 3,400
An answer to Noor's question
i would like to know which chemical/substances are soluble and insoluble.. thank u :) is

This was posted by on
- Wednesday, October 16, 2002 at 09:49:56 (EDT)

Question number 3,375
An answer to Michelle Mulvey's question
how do you set up a specific gravity prblem? is

This was posted by on
- Tuesday, October 08, 2002 at 17:55:50 (EDT)

Question number 3,373
An answer to bernice's question
can you answer my question please? thank you is

This was posted by on
- Monday, October 07, 2002 at 22:10:57 (EDT)

Question number 3,368
An answer to jillie's question
help me please i need it is

This was posted by on
- Saturday, October 05, 2002 at 15:02:15 (EDT)

Question number 3,367
An answer to jillie's question
thanks for your help is

This was posted by on
- Saturday, October 05, 2002 at 15:01:25 (EDT)

Question number 297
An answer to frederick dolby's question
How much work is done on the atmosphere by reacting one mole of sodium metal with water if the temperature is raised by 25 C? is

9315J

This was posted by devesh on
- Thursday, October 03, 2002 at 14:12:41 (EDT)

Question number 3,358
An answer to Jonathan's question
Names of gases that combine to form solids is

This was posted by on
- Thursday, October 03, 2002 at 00:54:55 (EDT)

Question number 3,339
An answer to nida 's question
what is carbon mono oxide and what are its side affect? is

This was posted by I need pictures of sodium on
- Wednesday, September 25, 2002 at 09:32:08 (EDT)

Question number 3,339
An answer to nida 's question
what is carbon mono oxide and what are its side affect? is

This was posted by nida on
- Sunday, September 22, 2002 at 22:43:35 (EDT)

Question number 203
An answer to abdula's question
How many molecules of water are there in the Earth is

This was posted by on
- Tuesday, September 10, 2002 at 19:05:17 (EDT)

Question number 3,289
An answer to dawn's question
Is bromoform miscible with water?? with cyclhexane?? is

no and no

This was posted by janina on
- Wednesday, August 21, 2002 at 17:15:58 (EDT)

Question number 3,272
An answer to Henry Capasso's question
From which end of a carbon chain do I begin counting in order to put the correct number on an NH2 (amine). is

which ever end will giv the lowest number to the first branch.

This was posted by Omri on
- Tuesday, July 23, 2002 at 00:01:44 (EDT)

Question number 156
An answer to Monica's question
What is lectin in food? And what effect does it have on the body and one,s health? is

What is lectin in food?

This was posted by Kongwut on
- Saturday, June 29, 2002 at 03:47:46 (EDT)

Question number 172
An answer to Donna Tolbert's question
Where can I get information on vinyl-benzene? is

What is lectin?

This was posted by Kongwut on
- Saturday, June 29, 2002 at 03:46:44 (EDT)

Question number 3,203
An answer to Jeff's question
What is a reason for a less than 100% yield in a reaction? is

it totally depends on what reaction you were doing...if you tell me i can help. My class is doing a bunch of labs right now and we have to do error analysis, so im pretty good at it

This was posted by Melissa on
- Sunday, June 02, 2002 at 20:06:51 (EDT)

Question number 3,239
An answer to Cecilia's question
Why the nonmetal has low ionization as go down the group? is

This was posted by on
- Friday, May 24, 2002 at 23:16:17 (EDT)

Question number
An answer to 's question
is

This was posted by on
- Tuesday, May 21, 2002 at 14:18:40 (EDT)

Question number 2,749
An answer to Rebecca Franklin's question
I need help with my Chemistry homework is

This was posted by on
- Tuesday, May 14, 2002 at 16:56:13 (EDT)

Question number 3,215
An answer to kayte's question
I need some help with an assignment I is

This was posted by on
- Sunday, May 12, 2002 at 05:33:11 (EDT)

Question number 3,141
An answer to Nicholas Evans's question
What is the difference between Concentrated and Dilute acids? is

Concentrated are stronger, diluted are weaker

This was posted by on
- Wednesday, May 08, 2002 at 22:03:11 (EDT)

Question number 265
An answer to melina's question
what is in ferroxygel? is

This was posted by on
- Thursday, April 25, 2002 at 07:06:29 (EDT)

Question number 262
An answer to angela Mietzner's question
How many grams do 5.0 * 10 to the 20th molecules of aspirin C9H8O4 weigh? is

150 mg

This was posted by G Hall on
- Friday, April 19, 2002 at 08:47:29 (EDT)

Question number 3,068
An answer to courtney's question
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! is

First you must write a balanced equation of H2O --> H 2(g) + O2 (g) then figure it out from there the answer will end up being 150cm cubed

This was posted by Jamie on
- Monday, April 15, 2002 at 12:57:54 (EDT)

Question number 312
An answer to donna's question
how is amyl or butyl nitrate designed chemically and what is the structural formula, Thanks for your help! is

This was posted by on
- Tuesday, April 09, 2002 at 04:33:17 (EDT)

Question number 3,141
An answer to Nicholas Evans's question
What is the difference between Concentrated and Dilute acids? is

This was posted by on
- Thursday, April 04, 2002 at 19:23:49 (EST)

Question number 3,126
An answer to David's question
How better to learn than to have a question and answer site! is

For real...

This was posted by Stacey on
- Tuesday, April 02, 2002 at 17:38:39 (EST)

Question number 3,133
An answer to Jeremy's question
I really am good at algebra is

This was posted by on
- Thursday, March 28, 2002 at 14:38:32 (EST)

Question number
An answer to 's question
is

This was posted by on
- Sunday, March 24, 2002 at 14:37:33 (EST)

Question number
An answer to 's question
is

This was posted by on
- Sunday, March 24, 2002 at 14:37:18 (EST)

Question number
An answer to 's question
is

This was posted by on
- Sunday, March 24, 2002 at 14:37:00 (EST)

Question number
An answer to 's question
is

This was posted by on
- Sunday, March 24, 2002 at 14:36:33 (EST)

Question number 3,087
An answer to Emily's question
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? is

This was posted by on
- Wednesday, March 13, 2002 at 12:22:22 (EST)

Question number 3,033
An answer to Chelsea's question
This site helps! is

This was posted by on
- Thursday, March 07, 2002 at 19:15:46 (EST)

Question number 3,066
An answer to vanna's question
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!!! is

This was posted by on
- Tuesday, March 05, 2002 at 19:22:37 (EST)

Question number 3,061
An answer to Jack's question
no . is

This was posted by on
- Saturday, March 02, 2002 at 02:25:10 (EST)

Question number 3,029
An answer to Kanwal's question
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? is

This was posted by on
- Wednesday, February 20, 2002 at 20:50:33 (EST)

Question number 2,913
An answer to Natasha Garza's question
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 is

As 97g of AsF3 contains 6.02*10^23 molecules, Therefore, (x)g AsF3 contains 4.5*10^22, (4.5*10^22)*(97)/(6.02*10^23) =7.3grams

This was posted by Jessmeister on
- Friday, February 01, 2002 at 23:30:43 (EST)

Question number 1,953
An answer to Val's question
What are the symbols for elements 119 and 120? is

look on a periodic table you idiot

This was posted by on
- Sunday, January 27, 2002 at 09:57:20 (EST)

Question number 2,956
An answer to Ryan's question
how do you calculate and set up the equation for molarity? is

To calculate molarity the equation is: molarity = moles of solute/litres of solution = mol/L

This was posted by Narelle on
- Friday, January 18, 2002 at 23:20:37 (EST)

Question number 2,802
An answer to SShah's question
PLEASE HELP ME BALANCE THIS EQUATION : CuSO4 + KI forms CuI + KI3 + K2SO4 is

2 CuSO4 + 5 KI -> 2 CuI + KI3 + 2K2SO4 To get this just balance individual ions on each side of the equation. Put coefficients in front of each compound a CuSO4 + b KI = c CuI + d KI3 + e K2SO4 Now balance Cu: a=c SO4: a=e K: b=d+2e I: b=c+3d There are four equations and five unknowns, remember algebra? You can solve for four of them in terms of a base variable, and don't solve for d. Set d=1 and then solve for the rest and viola!

This was posted by Stan Frey on
- Thursday, January 10, 2002 at 21:00:54 (EST)

Question number 2,802
An answer to SShah's question
PLEASE HELP ME BALANCE THIS EQUATION : CuSO4 + KI forms CuI + KI3 + K2SO4 is

This was posted by on
- Thursday, January 10, 2002 at 21:00:42 (EST)

Question number 2,825
An answer to JazzMan268's question
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. is

Hydrates are actually bonded to the substance being hydrated. It will weigh more. For example when you evaporate all the unbonded water in solution you will still have the 12 moles of H2O bonded. There is likely a higher decomposition temperature that the 12 H2O's will come off at but there you are actually breaking bonds. So yes the H2O is part of the product and is counted in the weight. It is not just showing that it is in a solution of water.

This was posted by Stan Frey on
- Thursday, January 10, 2002 at 20:13:12 (EST)

Question number 2,833
An answer to Jay's question
A solution whose pH=10 has a hydrogen ion concentration of is

10e-10

This was posted by Stan Frey on
- Thursday, January 10, 2002 at 20:08:56 (EST)

Question number 2,897
An answer to Erica's question
How many nanometers are in 1 meter? is

10e9

This was posted by Stan Frey on
- Thursday, January 10, 2002 at 20:06:23 (EST)

Question number 2,906
An answer to Tanya's question
If you earn $200/week and work 50 weeks/yr, how long wil it take to get 1 mole of pennies? is

6.22e23p/(20000p/wk*50wk/yr)=6.22e17 yrs!

This was posted by Stan Frey on
- Thursday, January 10, 2002 at 20:05:50 (EST)

Question number 2,749
An answer to Rebecca Franklin's question
I need help with my Chemistry homework is

What is your question?

This was posted by Grace on
- Wednesday, January 09, 2002 at 02:05:04 (EST)

Question number 2,775
An answer to Jay's question
Kinetics Theories? is

All substances are consists of molecules.In gaseous state,it is assumed that there is no attraction between molecules.In liquid state,molocules are bonded but the bond is not strong.In solid state,moloecules are packed together by strong bonds.

This was posted by Grace on
- Wednesday, January 09, 2002 at 02:03:10 (EST)

Question number 2,616
An answer to Liz's question
I want to know the answer to my question, please is

This was posted by on
- Wednesday, January 09, 2002 at 01:59:38 (EST)

Question number 2,897
An answer to Erica's question
How many nanometers are in 1 meter? is

1 bil. nanometers are in a meter.

This was posted by on
- Saturday, January 05, 2002 at 17:03:28 (EST)

Question number 120
An answer to Mike C's question
Hi, Im having trouble with a project that I am required to do in Chemistry. I have to wirte on the following topics: 1. In gruop 1 the atomic raduis of the elements increses with an increase in the atomic number. I am required to tell why this happens, and give reasons. PLEASE HLEP is

what is the origin of Mole

This was posted by on
- Friday, December 21, 2001 at 08:53:33 (EST)

Question number 2,881
An answer to Tommy Castronova's question
This is a very good site is

what r the pyhsical properties and chemical properties of tungsten the element

This was posted by ashley on
- Wednesday, December 19, 2001 at 18:33:41 (EST)

Question number 2,836
An answer to molly's question
good stuff is

This was posted by on
- Saturday, December 15, 2001 at 14:37:09 (EST)

Question number 2,844
An answer to Amy's question
Answer me! is

Hi?

This was posted by Amy on
- Sunday, December 09, 2001 at 13:06:25 (EST)

Question number 2,802
An answer to SShah's question
PLEASE HELP ME BALANCE THIS EQUATION : CuSO4 + KI forms CuI + KI3 + K2SO4 is

2CuSO4+5KI=2CuI+KI3+2K2SO4

This was posted by on
- Saturday, December 08, 2001 at 17:12:25 (EST)

Question number 2,833
An answer to Jay's question
A solution whose pH=10 has a hydrogen ion concentration of is

10^-10

This was posted by on
- Saturday, December 08, 2001 at 16:55:53 (EST)

Question number 2,823
An answer to JazzMan268's question
In AP Chemistry and not understanding as much as i did in Chem. I. is

I am failing AP Chemistry and it is really hard.

This was posted by Elise on
- Friday, December 07, 2001 at 00:18:09 (EST)

Question number 2,813
An answer to eric's question
??? is

This was posted by on
- Thursday, December 06, 2001 at 19:30:02 (EST)

Question number 2,816
An answer to JD's question
thanks is

This was posted by on
- Thursday, December 06, 2001 at 00:17:21 (EST)

Question number 2,702
An answer to Nikki Holloway's question
Acetaminophen is

This is not aspirin!!! it is completely different drug.it is Tylenol.

This was posted by julie on
- Thursday, December 06, 2001 at 00:11:56 (EST)

Question number 2,694
An answer to Kristie's question
Do I have to go back here, or will you e-mail me the answer? is

This was posted by on
- Thursday, December 06, 2001 at 00:08:36 (EST)

Question number 2,801
An answer to SShah's question
good job is

This was posted by on
- Wednesday, December 05, 2001 at 18:21:24 (EST)

Question number 2,694
An answer to Kristie's question
Do I have to go back here, or will you e-mail me the answer? is

What is your question?

This was posted by Amy Jo on
- Monday, December 03, 2001 at 18:10:53 (EST)

Question number 2,702
An answer to Nikki Holloway's question
Acetaminophen is

It is the big name for asprin.

This was posted by Kelli Marie on
- Monday, December 03, 2001 at 18:09:51 (EST)

Question number 312
An answer to donna's question
how is amyl or butyl nitrate designed chemically and what is the structural formula, Thanks for your help! is

I Need A Lot of help with my chemistry homework.. can anyone help me??

This was posted by Jenny on
- Sunday, December 02, 2001 at 19:13:01 (EST)

Question number 312
An answer to donna's question
how is amyl or butyl nitrate designed chemically and what is the structural formula, Thanks for your help! is

How do u find the empirical and molecular formulas?

This was posted by Jenny on
- Sunday, December 02, 2001 at 19:11:21 (EST)

Question number 2,762
An answer to CARLOS AVILA's question
balance the equation below __K+__MgBr--->__KBr+__Mg is

Isn't it balanced already? The reactants and products are all in a 1 to 1 ratio.

This was posted by Inez on
- Thursday, November 29, 2001 at 17:46:44 (EST)

Question number 100
An answer to nick's question
Each FRH (Flameless ration Heater) contains 8.1g magnesiu. Asuming this magnesium reacts completly, how many grams of hydrogen gas are produced is

This was posted by on
- Monday, November 19, 2001 at 17:48:50 (EST)

Question number 2,737
An answer to Angel 's question
I need serious help with my chemistry class. I hope this can help. is

Hey Angel, I can help ya. Just give me your Screen name.

This was posted by Mike on
- Sunday, November 18, 2001 at 19:32:07 (EST)

Question number 308
An answer to PAUL's question
WHAT KIND OF THING DOES A CHEMIST DEAL WITH is

This was posted by on
- Tuesday, November 13, 2001 at 15:39:32 (EST)

Question number 310
An answer to Tanya's question
I was wondering what the difference is between using glass stopcocks and teflon stopcocks is

This was posted by on
- Tuesday, November 13, 2001 at 15:38:59 (EST)

Question number 2,575
An answer to mary's question
What is a simple way of balancing equations? is

take each element in turn on the left hand side of the equation and make sure it has the same number as in the right side of the equation, when you reach the equals all elements within that equation should be balanced

This was posted by Niki Pearce@hotmail.com on
- Tuesday, November 13, 2001 at 14:21:43 (EST)

Question number 2,593
An answer to Kat's question
Really do need to know this is

This was posted by on
- Monday, November 12, 2001 at 16:00:04 (EST)

Question number 265
An answer to melina's question
what is in ferroxygel? is

spot fighting cream

This was posted by jon on
- Thursday, November 08, 2001 at 17:15:21 (EST)

Question number 2,702
An answer to Nikki Holloway's question
Acetaminophen is

This was posted by nikki hollwoaw on
- Wednesday, November 07, 2001 at 16:31:54 (EST)

Question number 2,380
An answer to matt hansons's question
please help answer my question is

This was posted by on
- Wednesday, October 24, 2001 at 13:32:22 (EDT)

Question number 2,640
An answer to kat's question
Ca + O2 = CaO2 is

calcium oxide

This was posted by mesha on
- Monday, October 22, 2001 at 22:54:25 (EDT)

Question number 2,620
An answer to rosa's question
the balance for: P4 + Cl 2 @ PCl 3 is

howz this:? p4+6cl2 forming 4pcl3

This was posted by janani on
- Sunday, October 21, 2001 at 12:33:43 (EDT)

Question number 2,634
An answer to Janice 's question
A very helpful web for study. is

try www.sparknotes.com

This was posted by janani on
- Sunday, October 21, 2001 at 12:30:39 (EDT)

Question number 2,628
An answer to Dawn's question
Yup is

This was posted by on
- Tuesday, October 16, 2001 at 22:13:08 (EDT)

Question number 107
An answer to jimT's question
Can the root alkanes be derived from thier alcohols, for example CH4 from CH3OH or C2H6 from C2H5OH. Does the reaction NH3 + CH3OH -> CH4 + NH2OH Work or is it one of those you can balance but does not really take place. is

I am going to get information about the process of manufacturing of Poly Vynil Alcohol. awaiting for ur reply. Plz reply as soon as possible. Best Regards. Mehdi Jafari E-mail: Mehdijafaria@yahoo.com

This was posted by Mehdi Jafari on
- Tuesday, October 16, 2001 at 03:03:03 (EDT)

Question number 2,628
An answer to Dawn's question
Yup is

This was posted by on
- Sunday, October 14, 2001 at 18:59:35 (EDT)

Question number 265
An answer to melina's question
what is in ferroxygel? is

Can anyone tell me the equation for the reaction of acetanilide with a)water, b)toluene, and c) isopropanol?

This was posted by Julie on
- Saturday, October 13, 2001 at 17:08:20 (EDT)

Question number 2,620
An answer to rosa's question
the balance for: P4 + Cl 2 @ PCl 3 is

This was posted by rosa on
- Saturday, October 13, 2001 at 00:25:22 (EDT)

Question number 2,618
An answer to rosa's question
can you assist me in chemistry? is

yes

This was posted by rosa on
- Saturday, October 13, 2001 at 00:17:43 (EDT)

Question number 2,578
An answer to Joey Villeneuve's question
.. is

This was posted by Carltisha Davis on
- Wednesday, October 10, 2001 at 20:05:05 (EDT)

Question number 274
An answer to Student's question
Hi. I have to do a report on the element is

try this site; http://www.intheloop.com/metals/cobalt/

This was posted by on
- Friday, October 05, 2001 at 09:32:38 (EDT)

Question number
An answer to 's question
is

This was posted by on
- Thursday, October 04, 2001 at 22:10:36 (EDT)

Question number 2,552
An answer to matt haywood's question
PH3 is Phosphine.. What is the ine suffix and why is it applied? Thank you for your help! is

This was posted by on
- Thursday, October 04, 2001 at 20:35:58 (EDT)

Question number 2,570
An answer to kerri's question
Any help will be appreciated is

This was posted by on
- Thursday, October 04, 2001 at 13:48:15 (EDT)

Question number 2,549
An answer to Chrissie's question
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? is

This was posted by on
- Monday, October 01, 2001 at 22:47:50 (EDT)

Question number
An answer to 's question
is

This was posted by on
- Monday, October 01, 2001 at 22:17:40 (EDT)

Question number 2,515
An answer to Vic Gismondi's question
A block is found to have A VOlume of 35.3cm cubed. Its mass is 31.7g. Calculate the density of the block. is

density is equal to the mass over the volume therefore 31.7g divded by 35.3cm but change the units to kg and m

This was posted by jill on
- Monday, October 01, 2001 at 22:17:41 (EDT)

Question number 2,515
An answer to Vic Gismondi's question
A block is found to have A VOlume of 35.3cm cubed. Its mass is 31.7g. Calculate the density of the block. is

mass divided by volume

This was posted by Thomas Pearson on
- Monday, October 01, 2001 at 19:26:24 (EDT)

Question number 2,526
An answer to Joanne's question
... is

how do you do scientific notation problems?

This was posted by Janel Logan on
- Sunday, September 30, 2001 at 21:58:11 (EDT)

Question number 2,515
An answer to Vic Gismondi's question
A block is found to have A VOlume of 35.3cm cubed. Its mass is 31.7g. Calculate the density of the block. is

the formula to calculate density is mass/volume. get a calculator if ya cant do the math.

This was posted by todd on
- Sunday, September 30, 2001 at 20:10:11 (EDT)

Question number 2,470
An answer to James Anderson's question
Excellent! is

This was posted by on
- Wednesday, September 19, 2001 at 05:54:56 (EDT)

Question number 172
An answer to Donna Tolbert's question
Where can I get information on vinyl-benzene? is

This was posted by on
- Tuesday, September 18, 2001 at 11:44:14 (EDT)

Question number 173
An answer to William's question
Does isostearyl alcohol, dimethyl isosorbide and butyl stearate have alternative chemical names and where can more information be obtained about these chemicals? is

Definitions of: precipitation cup, erlenmayer flask, pipetes, test tube 13 x 100, 18x150, watch glass,stration funnel, glass rod, evaportation capsule, test tube wash, test tube rack, bunsen borner, succer for test tub, asbestos wire netting, latex tube, universal support with plastic rod, stationary tripod, filter, wath glass

This was posted by Ana Lucía on
- Monday, September 17, 2001 at 00:45:04 (EDT)

Question number 2,305
An answer to evan's question
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? is

the difference with the hot water is the reaction kinetics. the reaction rate(the rate at wich the reaction would tend to happen) is increased at a higher temperature because the molecules are more energetic (swimming around more) increasing the probability of a collission with another molecule, thus reacting (quicker). The same amount of sugar can be dissolved in room temperature (or even lower)water but it would noticably take a little longer because the molecules are a little sluggish(depending on temp)in the colder water so they don't move around as much or as quickly so the probability of collission is lower. Perform a titration to figure how much sugar can be dissolved. get some sugar in a container (pourable) and weigh it then begin to add sugar and mix it until it is dissolved. keep doing this slowly until you cant see any sugar in the water. pour more and do the same. you will know how much sugar you have poured when you weigh the container and note the difference in weight. You will know when no more sugar will dissolve by noticing that however much you mix there is still a little in the bottom (visible). you might want to try it at different temperatures.

This was posted by on
- Tuesday, September 11, 2001 at 01:38:36 (EDT)

Question number 2,338
An answer to Jo Ox's question
Can you please tell me ehat a mass spectrometrist does. is

they take mass spec data (mass spectrometry; bombard molecules with electrons breaking them apart, analysing the masses of the fragments gives the molecular weight, possibly the molecular formula, and clues to the structure and functional groups. less than a milligram of sample is destroyed in this analysis)

This was posted by on
- Tuesday, September 11, 2001 at 01:26:39 (EDT)

Question number 2,450
An answer to Nikki's question
What happens to atoms during a chemical reaction? is

they get transfered/shared among the reacting molecules

This was posted by on
- Tuesday, September 11, 2001 at 01:15:00 (EDT)

Question number 329
An answer to Jessica's question
I need a list of the comon polar molcules is

This was posted by on
- Monday, September 03, 2001 at 20:39:42 (EDT)

Question number 306
An answer to Tino Alanis's question
what is the element phosphosorus? is

This was posted by on
- Monday, August 27, 2001 at 03:58:58 (EDT)

Question number 220
An answer to Emma's question
The number of electrons is an element is 35, the mass number is 80. What is the number of protons and neutrons? is

This was posted by on
- Thursday, August 16, 2001 at 15:41:17 (EDT)

Question number 2,007
An answer to Raheleh Sarbaziha's question
HELPME is

u need any help ?

This was posted by Pao on
- Monday, August 13, 2001 at 04:55:19 (EDT)

Question number 1,658
An answer to Mauia's question
Why is the triangle used as a symbol of heat in a chemical equation? is

This was posted by on
- Wednesday, August 08, 2001 at 02:49:31 (EDT)

Question number 2,384
An answer to Kyle Dana's question
Thanks. is

what is this equation in words- Na2S2O3+2HCL=2NaCl+H2O+S+SO2

This was posted by lala on
- Monday, August 06, 2001 at 11:36:32 (EDT)

gian electrons

This was posted by tim on
- Thursday, August 02, 2001 at 10:27:10 (EDT)

Question number 2,380
An answer to matt hansons's question
please help answer my question is

This was posted by on
- Sunday, July 29, 2001 at 23:12:12 (EDT)

Question number 2,380
An answer to matt hansons's question
please help answer my question is

This was posted by on
- Sunday, July 29, 2001 at 23:11:33 (EDT)

Question number 2,370
An answer to Kitty's question
I think this site is awesome!!!!!!!! is

This was posted by on
- Friday, July 20, 2001 at 07:10:43 (EDT)

Question number 2,360
An answer to cane's question
I would appreciated your help for I have searched everywhere to try and find this answer. thank-you is

This was posted by cane on
- Wednesday, July 18, 2001 at 22:50:02 (EDT)

Question number 2,270
An answer to steve's question
is there a chemical way to remove oxygen from water is

Yes,Unfortunately,the pervious ANSWER is wrong.The way that you can seperate H2 and O2 in Water is called Electrolysis.

This was posted by Vahid on
- Saturday, July 14, 2001 at 22:50:50 (EDT)

Question number 2,223
An answer to brandon's question
why is chemistry a part of school curriculum is

Well,Just take a look around yourself.Most of things around us depend on Chemistry,Food we eat,Cloth we wear,and so forth,too many to mention.So,it's essential to know chemistry.

This was posted by Vahid on
- Saturday, July 14, 2001 at 22:41:05 (EDT)

Question number 2,320
An answer to wendy's question
thank you all!! is

This was posted by on
- Wednesday, July 04, 2001 at 17:27:12 (EDT)

Question number 2,340
An answer to Yula Kontelia's question
I would be grateful if you could provide an answer to my querry is

This was posted by susan on
- Thursday, June 28, 2001 at 03:34:03 (EDT)

Question number 2,249
An answer to majid aram's question
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. is

poop

This was posted by on
- Thursday, June 14, 2001 at 23:19:38 (EDT)

Question number 2,254
An answer to Veronica's question
Good website in helping students learn more about Chemistry and trying to help others solve their problems. is

www.about.com

This was posted by kylee on
- Wednesday, May 23, 2001 at 16:47:03 (EDT)

Question number 2,254
An answer to Veronica's question
Good website in helping students learn more about Chemistry and trying to help others solve their problems. is

www.about.com

This was posted by kylee on
- Wednesday, May 23, 2001 at 16:47:03 (EDT)

Question number 2,254
An answer to Veronica's question
Good website in helping students learn more about Chemistry and trying to help others solve their problems. is

www.about.com

This was posted by kylee on
- Wednesday, May 23, 2001 at 16:47:02 (EDT)

Question number 2,278
An answer to erika mcewan's question
is there an good experiments to show middle school children to help them better understand equilibrium? is

Is there a chemical way to xtract citric acid from juice-if yes..plz explain what it involves..THANX ;)))))

This was posted by Jamie on
- Tuesday, May 22, 2001 at 05:20:11 (EDT)

Question number 2,270
An answer to steve's question
is there a chemical way to remove oxygen from water is

yeah their is a chemical way to remove oxygen from water. it's called by distillation.

This was posted by Kim on
- Sunday, May 20, 2001 at 12:53:36 (EDT)

Question number 2,236
An answer to Brandon Wotachek's question
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? is

This was posted by on
- Wednesday, May 16, 2001 at 13:32:38 (EDT)

Question number 100
An answer to nick's question
Each FRH (Flameless ration Heater) contains 8.1g magnesiu. Asuming this magnesium reacts completly, how many grams of hydrogen gas are produced is

This was posted by on
- Thursday, May 10, 2001 at 23:23:26 (EDT)

Question number 1,876
An answer to Monica 's question
At what temperature does regular paper catch fire and burn? is

451

This was posted by Neil on
- Saturday, May 05, 2001 at 21:52:53 (EDT)

Question number 2,057
An answer to Marie-Helene Mourant's question
Why do we get automatically cold when we get out of water even though the weather is warm? is

water on our body evaporates and during evaporating it takes heat energy from our body so weget cold

This was posted by doðan on
- Tuesday, April 17, 2001 at 11:41:52 (EDT)

Question number 2,192
An answer to ManVy's question
What are substances that less dense than water? is

oil,toluene,hexane,etc.

This was posted by the mighty atom on
- Saturday, April 14, 2001 at 06:46:02 (EDT)

Question number 2,207
An answer to B William's question
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 is

This was posted by on
- Thursday, April 12, 2001 at 04:28:42 (EDT)

Question number 2,092
An answer to PBuffonge's question
Acid indigestion can be cured by drinking a solution of a weak --------- (the answer is a 6 letter word) is

ALKALI

This was posted by Unity on
- Friday, March 30, 2001 at 18:56:17 (EST)

Question number 2,090
An answer to DBuffonge's question
What forms when acid meets alkaline? is

A neutralised substance..

This was posted by UNITY on
- Friday, March 30, 2001 at 18:56:01 (EST)

Question number 2,098
An answer to Shanna Womack's question
How do i do molar mass and grams to moles conversion! is

No. of moles = mass (in grams) --------------- molar mass i.e mass = the amount of the substance/gas/solid you have been given molar mass = the amount expected to be present(in grams) when calculated... the weight of the element/compound which makes it one mole..

This was posted by Unity on
- Friday, March 30, 2001 at 18:54:03 (EST)

Question number 2,162
An answer to rachel's question
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. is

This was posted by on
- Monday, March 26, 2001 at 18:42:19 (EST)

Question number 2,120
An answer to Rebecca's question
this is great that we can get help. is

can you give me a list of jobs that use sulphruic acid

This was posted by brian on
- Monday, March 26, 2001 at 13:31:12 (EST)

Question number 2,120
An answer to Rebecca's question
this is great that we can get help. is

can you give me a list of jobs that use sulphruic acid

This was posted by brian on
- Monday, March 26, 2001 at 13:31:10 (EST)

Question number 2,131
An answer to kk's question
Could u tell me the value for the enthalpy change of solution of potassium nitrate KNO3 and give me the source of your answer is

This was posted by Pat Kaye on
- Sunday, March 11, 2001 at 14:58:23 (EST)

Question number 2,098
An answer to Shanna Womack's question
How do i do molar mass and grams to moles conversion! is

to find grams from moles you just mutliple the given grams times 1 mole and divide by the molar mass. To find the molar mass you simple use the rounded atomic mass.

This was posted by Brett on
- Saturday, March 03, 2001 at 20:55:38 (EST)

Question number 2,023
An answer to Clare's question
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 is

Because if the temperature is hot the molecules inside the jar are full of energie and they run around everywhere. When they hit on the side of the Jar that's what you call pressure . When they are hot they have more energie and the pressure pushes the water out and the cold one sucks it in because it needs more molecules.

This was posted by Marie-Helene Mourant on
- Thursday, February 15, 2001 at 20:59:21 (EST)

Question number 1,990
An answer to tomy joseph's question
Is it possible to color red gold , 24 ct yellow color without using cynide? is

This was posted by on
- Saturday, February 03, 2001 at 09:55:26 (EST)

Question number 2,014
An answer to stella's question
What happen when we add lemon in a CO2 beverage is

This was posted by on
- Thursday, January 25, 2001 at 13:02:36 (EST)

Question number 2,014
An answer to stella's question
What happen when we add lemon in a CO2 beverage is

produce carbonic acid

This was posted by ben on
- Wednesday, January 24, 2001 at 11:36:12 (EST)

Question number 2,014
An answer to stella's question
What happen when we add lemon in a CO2 beverage is

This was posted by on
- Wednesday, January 24, 2001 at 11:27:57 (EST)

Question number 1,994
An answer to stella 's question
very interesting and useful is

This was posted by on
- Monday, January 15, 2001 at 14:41:11 (EST)

Question number 1,994
An answer to stella 's question
very interesting and useful is

This was posted by on
- Monday, January 15, 2001 at 14:41:05 (EST)

Question number 1,985
An answer to Arlen's question
it is great is

This was posted by on
- Saturday, January 13, 2001 at 23:25:24 (EST)

Question number 1,982
An answer to julie's question
how much heat is required to raise the temperature of 854g H2O from 23.5 c to 85.0 c? is

what is an analyte?

This was posted by arlen m on
- Thursday, January 11, 2001 at 17:36:47 (EST)

Question number 1,929
An answer to Alex Bailey's question
Lets just put it at this,bub.If you can is

it works great

This was posted by nick on
- Sunday, December 17, 2000 at 00:37:35 (EST)

Question number 1,905
An answer to jean's question
which is the more sensitive technique and why, FT-IR or NMR? is

thIs two techniques use a different range of energy and give complementary results. The range of NMR, radio frequence, (lower energy than FT-IR) give information on structural construction of the molecule. his spectroscopy is based on the spin of the nucleus. The FT-IR (infrared wave lenght) give the presence of functional group (acid, ether, cyclic ring...)This spectroscopy is based on the vibration of each polarised bond of molecules.

This was posted by d. Lavoie on
- Sunday, December 10, 2000 at 00:24:02 (EST)

Question number 1,860
An answer to Robert Kiel's question
How do you measure the amount of protein in plants? is

Gel Electrophoresis SDS-PAGE

This was posted by JM on
- Sunday, November 19, 2000 at 11:58:45 (EST)

Question number 1,876
An answer to Monica 's question
At what temperature does regular paper catch fire and burn? is

It flashes at 451F

This was posted by Ellie on
- Thursday, November 16, 2000 at 21:48:05 (EST)

Question number 1,815
An answer to Mackenzie's question
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! is

In decaffeination is used also supercritical CO2 which is non-polar. You should check caffeine soubility with Di-methyl-chloride, which is supposed to be very high. I am not sure caffeine is polar. I know this doesn't answer your question, but may help.

This was posted by John Parker on
- Friday, November 10, 2000 at 09:29:58 (EST)

Question number 1,785
An answer to mike 's question
how do i figure out changes in volume when adding crystallized acid to water is

This was posted by 4apples on
- Thursday, November 02, 2000 at 23:01:42 (EST)

Question number 1,729
An answer to raina ramirez's question
I am looking for a procedure on how to analyze a compact disc. Can anyone help me? is

This was posted by on
- Monday, October 30, 2000 at 12:56:39 (EST)

Question number 1,677
An answer to Ann's question
What is the triple point of water? is

The point where solid,liquid and gas water is in equilibrium.

This was posted by d Lavoie on
- Monday, October 30, 2000 at 02:36:20 (EST)

Question number 1,732
An answer to Debra Xavier's question
What chemical composition is HC2H3O2? is

Acetic acid

This was posted by D Lavoie on
- Monday, October 30, 2000 at 02:31:34 (EST)

Question number 1,725
An answer to john's question
Does anyone know who invented the Periodic Table? is

Actually Mendelejev invented it-It hadn't the layout we're used to,though Ciao and take care

This was posted by Marietto on
- Thursday, October 26, 2000 at 15:39:58 (EDT)

Question number 1,577
An answer to MARIO 's question
HOW MANY MOLES OF ALUMINUM ARE IN 6 GRAMS OF ALUMINUM? is

By using your periodic table you can find the atomic number of aluminium (27) You now know that there is 27 grammes of aluminium in 1 mole so to find how many moles in 6 grammes divide 27 by 6 and hey presto!!

This was posted by jennifer g (belfast) on
- Thursday, October 19, 2000 at 16:59:59 (EDT)

Question number 1,649
An answer to melissa's question
why do jeans fade? is

The dye is partially water based so overwashing causes the dye to fade!!

This was posted by Jennifer G (belfast) on
- Thursday, October 19, 2000 at 16:54:38 (EDT)

Question number 1,658
An answer to Mauia's question
Why is the triangle used as a symbol of heat in a chemical equation? is

It's not a triangle! It's the greek letter delta (if thats any help!!

This was posted by Jennifer G (belfast) on
- Thursday, October 19, 2000 at 16:51:46 (EDT)

Question number 1,700
An answer to Joanne Carpenter's question
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. is

This was posted by on
- Wednesday, October 18, 2000 at 08:52:48 (EDT)

Question number 1,612
An answer to Vinumoan K. Mathew's question
I am using this site for the first time and i don is

How do you calculate the bond order of a Boron trifluoride molecule?

This was posted by Vinumoan K. Mathew on
- Thursday, October 05, 2000 at 12:01:04 (EDT)

Question number 1,606
An answer to Stijn Hommes's question
Please mail answers to: MacGyverMagic@netscape.net is

This was posted by on
- Thursday, October 05, 2000 at 05:11:32 (EDT)

Question number 1,577
An answer to MARIO 's question
HOW MANY MOLES OF ALUMINUM ARE IN 6 GRAMS OF ALUMINUM? is

Use a periodical table to find the molar mass of aluminium.

This was posted by D. Lavoie on
- Monday, October 02, 2000 at 02:30:30 (EDT)

Question number 1,324
An answer to Mark Hinchey's question
What is the significance of hydrogen when considering the properties of acids is

WHEN AN ACID REACTS WITH ANOTHER SUBSTANCE IT GIVES OFF HYDROGEN ATOMS

This was posted by MARIO on
- Friday, September 29, 2000 at 16:51:42 (EDT)

Question number 1,573
An answer to MARIO PINTO's question
THIS IS A GREAT WEB SITE. is

This was posted by on
- Friday, September 29, 2000 at 16:43:27 (EDT)

Question number 1,545
An answer to rozi's question
i dunno...the sites good...but plz help me with this!! is

This was posted by on
- Sunday, September 24, 2000 at 09:59:59 (EDT)

Question number 1,410
An answer to Laura's question
Is the abundance of helium on earth decreasing? If so, what are the implications? is

For health none implication. But for the future rechearch and possible utilisation in a new technology it's problematic.

This was posted by Donald Lavoie on
- Thursday, September 14, 2000 at 01:23:09 (EDT)

Question number 1,437
An answer to Mary's question
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? is

The temperature raise the moleculars vibrations and moleculars colisions. With more energy, the thermodynamic predict a rise of H+ in solution... a lower pH. Use a buffer solution (pH 7) with a calibrated pHmeter and variate the temperature for build a graphic pH vs temperature.

This was posted by on
- Thursday, September 14, 2000 at 01:11:43 (EDT)

Question number 1,454
An answer to Rae Le cain's question
What liquid cannot be frozen? is

All liquids have a melting point it's only dependant of the lower temperature than you need. Example: mercury is a liquid metal and hydrogen a gaseous metal.

This was posted by Donald Lavoie on
- Thursday, September 14, 2000 at 00:55:31 (EDT)

Question number 1,477
An answer to bill johnston's question
Who is the most important chemist? is

Linus Pauling

This was posted by Donald Lavoie on
- Thursday, September 14, 2000 at 00:48:13 (EDT)

Question number 1,497
An answer to DAN KORMA's question
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 is

The density of osmium is 22.4 grams per cubic centimeter. Translate it to you barbars units.

This was posted by Donald Lavoie on
- Thursday, September 14, 2000 at 00:45:45 (EDT)

Question number 1,494
An answer to Misty's question
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? is

Put 1 ml of your initial product in a volumetric flask (10 ml) fill to a jauge line with your solvent. Shake well.

This was posted by Donald Lavoie on
- Thursday, September 14, 2000 at 00:40:46 (EDT)

Question number 1,383
An answer to Dusty J's question
What is quantitative analysis? is

Using exact numbers, not just words to peform the analysis exactly.

This was posted by on
- Wednesday, September 06, 2000 at 15:27:16 (EDT)

Question number 1,427
An answer to Ian Mclaren's question
Why are Kc values only affected by changes in temperature but not concentratio0n or pressure? is

Kc's are ionization constants. They are the constants found in the equations relating associated and disassociated forms, so the concentrations are all separated from it. Pressure does not affect it because there is no significant change in the volume of a solution when molecules associate and disassociate. If for some reason the ions are present in a gaseous phase, a situation that only occurs under extreme circumstances, there will be a pressure dependence.

This was posted by Matt Franczak on
- Thursday, August 24, 2000 at 14:58:39 (EDT)

Kw, the constant that defines the relation between [H+] and [OH-] in water is, like most equilibrium constants, dependent upon temperature, and since pH is -log [H+], the pH of a solution with the same composition will vary with temperature. Unfortunately, predicting the pH of a solution at a give temperature is somewhat more complicated, since it depends both on the temperature-induced changes for Kw and any other equilibria constants that may be involved in the solution.

This was posted by Matt Franczak on
- Thursday, August 24, 2000 at 14:46:58 (EDT)

Question number 1,435
An answer to Michelle's question
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! is

Carbon has been isolated in many of it's forms (diamond, charcoal, graphite, etc) since prehistoric times, so there is no acknowledged discoverer.

This was posted by Matt Franczak on
- Thursday, August 24, 2000 at 14:34:07 (EDT)

Question number 1,433
An answer to KIRANKUMAR SHAH's question
DEAR SIR, PL GIVE ME THE DETAIL ON PHOTOGRAPHY CHEMICAL.LIKE NAMES,TECHNICAL DETAIL.INTERNATIONAL MANUFACTURERS,CAS NO,MSDS, KIRANKUMAR SHAH is

This site has a list of the names of some common photographic chemicals http://www.sunspotphoto.com/chemistry/chemicals.html. Use a search engine to find individual MSDS's and manufacturers if you need them.

This was posted by Matt Franczak on
- Thursday, August 24, 2000 at 14:26:00 (EDT)

Question number 1,365
An answer to Karen's question
Just after information. is

This was posted by on
- Wednesday, August 23, 2000 at 00:18:19 (EDT)

Question number 1,408
An answer to trev's question
Can someone please explain to me why diamond has a lower melting and boiling point than graphite is

Graphite is actually more thermodynamically stable than diamond, so it takes more energy to break the bonds necessary to melt graphite than it does those in diamond. Ultimately diamond decays to graphite, but since the bonds in diamond are very strong and need to be broken before the graphite bonds can form, it only occurs at an observable rate at extreme temperatures.

This was posted by Matt Franczak on
- Monday, August 21, 2000 at 11:13:38 (EDT)

Question number 1,417
An answer to Assem Shawally's question
I just ask how I can prepare a pure samples of the following: 1-Perchloric acid 2-Lead acetate via Lead nitrate is

For the lead acetate, calcine the lead nitrate, giving you the oxide (it's sort of cheating but it should work). Try dissolving the oxide in a solution of glycerol and a molar excess of glacial acetic acid. If it works, evaporate away the liquid phase and you should have the acetate.

This was posted by Matt Franczak on
- Monday, August 21, 2000 at 11:04:34 (EDT)

Question number 1,417
An answer to Assem Shawally's question
I just ask how I can prepare a pure samples of the following: 1-Perchloric acid 2-Lead acetate via Lead nitrate is

This was posted by assem shawally on
- Monday, August 21, 2000 at 08:57:55 (EDT)

Question number 1,401
An answer to Kristen's question
I need to use this site to find out info is

when the coment page come up I had to retype my Question to get it on. If you get them the Question they know the answer.Hope this helps.

This was posted by h max on
- Friday, August 18, 2000 at 01:39:32 (EDT)

Question number 1,398
An answer to Harvey maxwell's question
Thanks Matt & Donald I understand the MSDS on Bromine better hmax(at)bellsouth.net If you don is

The total bromine (bromine+bromide since they both become bromide in the body) should not exceed 2.3 ppm according to Drinking Water and Health, Volume 3 from the Commission on Life Sciences, 1980. Accute exposure (one week or less) is acceptable up to 214.8 ppm in drinking water based on their numbers.

This was posted by Matt Franczak on
- Thursday, August 17, 2000 at 11:27:01 (EDT)

Question number 1,398
An answer to Harvey maxwell's question
Thanks Matt & Donald I understand the MSDS on Bromine better hmax(at)bellsouth.net If you don is

I don't know the toxicities offhand, but here's how to find the concentrations you'd need to assess them. There are some water testing kits that will detect molecular bromine. These can be found in general scientific supply catalogs (ex. VWR or Fischer) or through individual companies who make water testing equipment. For the bromide ion, this test is just off the top of my head, so it might not work: Take the mass of a sample (use a ~ 100 mL sample to start). Add silver nitrate to it until precipitation stops occuring, then add some excess (about 25% of what you added while it precipitated). Heat the solution up to about 70 C and let it cool to room temperature and allow the solids to settle (this makes collecting the precipitate easier). Take the mass of the filter paper. Collect the precipitate by filtering the solution and clean it by running some water through the filter paper. Dry the filter paper and precipitate and take their mass. Prepare 150 mL of saturated sodium chloride solution for g of precipitate. Make sure to place all the precipitate in the solution and boil it for at least 10 min (the more the better) and redillute to orginal volume. Allow the remaining solids to cool and settle. Mass another piece of filter paper and filter the preciptiate. The first precipitate should be silver bromide and silver chloride, and the second precipitate should be all chloride. The ppm bromide should be equal to the difference between the two precipitate's masses (found by subtracting the filter paper's mass from the filter paper + precipitate's mass) * 1,000,000 * 1.7976 / mass of origninal sample. I admit this definitely not the best method in terms of both time and accuracy, but it requires no special equipment or rare reagents. If you find the precipitates are too small (<0.5 g) increase the sample size, but after you have massed it, boil it down to 100 mL.

This was posted by Matt Franczak on
- Thursday, August 17, 2000 at 10:45:35 (EDT)

Question number 1,386
An answer to Harvey maxwell's question
Very good site is

In regard to your NaBr + NaOCl question (the posting for that question is a bit messed) The red is actually molecular bromine. Bromine is soluble to 3.58 g/100mL of water at room temperature, so if there is bromine present as a separate phase, there is at least that much bromine in the water. Further dilution will not eliminate the bromine, just add more room for it to dissolve. I strongly recommend against drinking it, but theoretically, one could boil it for a while to get rid of the bromine (BP 58.78 C) with means of getting rid of the vapors, as they, like gaseous chlorine, are not something you would want to breathe in.

This was posted by Matt Franczak on
- Wednesday, August 16, 2000 at 11:56:14 (EDT)

Question number 1,392
An answer to Josh's question
oops sorry about that last one, but my question is is

A given element is all the atoms with a certain number of protons in their nucleus.

This was posted by Matt Franczak on
- Wednesday, August 16, 2000 at 11:25:55 (EDT)

Question number 1,373
An answer to Harvey Maxwell's question
How much bromide can one consume from fruit and other natural sorces before haveing cronic symtoms is

The LD50 (Letal dose who kill 50% of rats) is 3,5g/kg for sodium bromide. Large dose cause a CNS (Central Nervous System)depression. Chronic absorption of lithium bromide cause skin eruptions and CNS disturbances due to bromide. May also cause a disturbed blood electrolyte balance. It's very hard to consume the quantity of bromide without a contamination to provoque a disease.

This was posted by Donald Lavoie on
- Sunday, August 13, 2000 at 02:08:18 (EDT)

Question number 1,383
An answer to Dusty J's question
What is quantitative analysis? is

The qualitative analysis give only the components, the quantitative give the quantity of chemicals components present in the sample.

This was posted by Donald Lavoie on
- Sunday, August 13, 2000 at 01:47:47 (EDT)

Question number 1,171
An answer to natasha scott's question
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. is

BaCl2 + Na2SO4 - precipitate BaCl2 + Na2CO3 - precipitate HCl + Na2CO3 - CO2 bubbles all others - nothing

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:32:57 (EDT)

Question number 1,178
An answer to Rich Moore's question
I is

Calcium hydroxide is basic. You use ammonium sulfate, a weak acid, to neutralize it. The results should be water, ammonia, and calcium sulfate. You should be able to substitute any weak acid for ammonium sulfate. Vinegar will neturalize the hydroxide, but I'm not familiar enough with the process to determine if it is going to pose a problem further along.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:31:03 (EDT)

Question number 1,225
An answer to Jennifer Prileson's question
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 is

Testing sulfites would work. There is some decently detailed info at chemistry.about.com if you search wine.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:16:58 (EDT)

Question number 1,257
An answer to jayme mathes's question
What would happen if i mix nitrogen with juices from a bee is

Nothing. Nitrogen is very innert.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:14:28 (EDT)

Question number 1,306
An answer to maleka's question
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... is

Terbium, ytterbium, erbium, and yttrium are all named for Ytterby, a village in Sweden.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:12:54 (EDT)

Question number 1,310
An answer to BRAD T. MILLER's question
FUSING ALUMINA WITH SODIUM CARBONATE TO PRODUCE SODIUM ALUMINATE. CAN ANYONE DESCRIBE THE PROCESS TO DO THIS? is

If it is going to occur, you just need to heat a fine powder mixture of them. However, nothing is going to happen until >830 C (melting point of carbonate). You can make sodium aluminate more easily by fusing sodium hydroxide (MP 180C) and aluminium hydroxide and drying it if you want an anhydrous product, but some methods are patented.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:09:44 (EDT)

Question number 1,371
An answer to Laura J's question
How does liquid detergent work to break down fats? is

Detergents have a polar and an non-polar section. Fats are mostly non-polar, so the non-polar ends of the detergents are attracted to them. The detergent molecules surround the fat with the polar ends pointing outward. Since water is very polar, the polar ends allow the fat to be dissolved along with the detergent and washed away.

This was posted by Matt Franczak on
- Friday, August 11, 2000 at 13:00:32 (EDT)

Question number 1,246
An answer to Gurpreet Rana's question
What are some good chemistry study guides is

This was posted by on
- Friday, August 11, 2000 at 07:44:57 (EDT)

Question number 1,357
An answer to Amanda's question
a is

This was posted by MUNGALPARA on
- Thursday, August 03, 2000 at 12:39:35 (EDT)

All the elements are different, although some were previously known under other names; I see the periodic table on this site is rather out of date, 104 is now rutherfordium (Rf), 105 is dubnium (Db), 106 is seaborgium (Sg), 107 is bohrium (Bh), 108 is Hassium (Hs), 109 is meitnerium (Mt), and 110-112 have been confirmed, but not named. 114, 116 and 118 have been reported as well. Look at www.webelements.com for loads of information.

This was posted by Kevin Thurlow on
- Wednesday, August 02, 2000 at 04:11:17 (EDT)

Question number 1,351
An answer to A.Sailaja's question
I am visiting this site for the first time. So may be I will be able to offer a comment the next time is

This was posted by on
- Sunday, July 30, 2000 at 16:02:04 (EDT)

Question number 1,341
An answer to Hortensia's question
ASAP is

What is your question?

This was posted by DL on
- Wednesday, July 26, 2000 at 10:30:40 (EDT)

Question number 1,343
An answer to Lima's question
What is percent yield, actual yield and theorical yield. Examples of each please is

Theorical yield is the perfect reaction whitout less of reactive in secondary reaction. The actual yield is the result actually, when we process the reaction (before amelioration the the technique) and the percent yield is only the result of your experiment in percent: (actual yield/theorical yield)*100. The theorical yield is give by the balanced equation of the reaction. Note it's very rare than the yield of a reaction equal the theorical yield.

This was posted by Donald Lavoie on
- Wednesday, July 26, 2000 at 10:29:21 (EDT)

Question number 1,336
An answer to Dennis Livingston's question
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? is

The best way is to use a viscosimeter. This device use a rotative probe in the solution. For your application I suggest a teflon probe.

This was posted by Donald Lavoie on
- Tuesday, July 25, 2000 at 00:08:05 (EDT)

Question number 1,329
An answer to Mark's question
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 ? is

This was posted by on
- Monday, July 24, 2000 at 11:45:09 (EDT)

Question number 882
An answer to Christine's question
what do the p and H stand for in pH? is

pH is the log (base 10) of the concentration of H+, If you inverse the pH (antilog) you find the concentration of H+ in M/L

This was posted by Donald Lavoie on
- Sunday, July 23, 2000 at 01:14:12 (EDT)

Question number 885
An answer to Renee's question
Why is gasoline not classified as a lipid? is

The lipids need CH3(CH2)n-COOR function where R is a polar radical, in the gazoline you find a majority of CH3-(CH2)n-CH3 and a lot of coumpounds with a sulfur and oxygen.

This was posted by Donald Lavoie on
- Sunday, July 23, 2000 at 01:10:15 (EDT)

Question number 949
An answer to Julie's question
Hello! I am doing a project in chemistry about perfumes and fragrances. What is the chemistry behind perfumes and fragrances? What makes rose oil smell like roses and peach oil smell like peaches? How are they different? Can you give me some structural diagrams of formulas? Can you give me some equations too? How can I get an experiment on these things? THANK YOU SO MUCH! is

Read on chemistry of ester, a lot of perfumes use this chemistry. Also for the more accentuate odour search in the chemistry of terpenes. Your question require a so long explanation for the objective of this site. Authors suggered for start your bibliography: Vollhardt, March, Corey, Xue-Min Chen, Streitwieser and Heathcock, Paul Arnaud.

This was posted by Donald Lavoie on
- Sunday, July 23, 2000 at 00:55:02 (EDT)

Question number 1,324
An answer to Mark Hinchey's question
What is the significance of hydrogen when considering the properties of acids is

the acidity is the concentration of H+ in the solution. For HCl, the dissociation is complete in H+ (on H3O+ form in solution because it's impossible th have a proton in solution) and Cl-. For acetic acid it have an equilibrium betwen CH3COOH <-> CH3COO- + H3O+. This acid is partially dissociate and the pKa is approx 3,75.

This was posted by on
- Friday, July 21, 2000 at 23:18:19 (EDT)

Question number 1,322
An answer to Angie's question
what are the factors that influence the number of isomers possible? thanks, ^_^ is

First, the number of different type of elements presents. Second the number of carbon atoms presents (in organic chemistry). Third, the number of oxygen, and or, nitrogen presents and fourth the number of carbon hybridisation (sp1,sp2 and sp3)possible. Dont forget the steric repulsion (caused by a proximity of atoms in the same molecule). By this effect certain numbers of isomers are impossible or they have a short time of life. (excuse my english, my mother language is french)

This was posted by Donald Lavoie on
- Thursday, July 20, 2000 at 04:12:00 (EDT)

It's hypotetic but the name of elements with atomic number 104 to 107 are suggered by U.I.C.P.A. The reason: Berkeley (USA) and Dubna (CCCP) claim the paternity of discovery.

This was posted by Donald Lavoie on
- Wednesday, July 19, 2000 at 00:38:20 (EDT)

Question number 1,295
An answer to Rick Fuehrer's question
At what temperature does sodium cloride melt? is

804 deg celcius (ref Merck Index 11 edition)

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 23:38:37 (EDT)

Question number 1,111
An answer to Bill Conlon's question
What is "sodium dodecyl benzene sulfonate" and what is its use?. is

It's a detergent. A long chain of hydrophobe carbon atoms (18) terminate by an hydrophylic function sulfonate (SO3). The sodium is present for balance the charge and to give a solubility in water.

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 01:36:43 (EDT)

Question number 1,117
An answer to vikki's question
what does activation energy, rate constant, rate equation and order of chemical reaction mean? is

Very interesting question, but it's impossible to respond in the space. Look Physical Chemistry P.W. Atkins or Physical chemistry Gordon M. Barrow. This books have a complete chapter for a good comprehension of this problem.

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 01:29:16 (EDT)

Question number 1,222
An answer to Alpha guy's question
I have a project to dry an enclosed container which is full of sand- no drains available. I can is

Y use each day a glove box (inert atmosphere). The solution of your problem depend of the size of your container. I suggest to raise the temperature of your sand approx at 110 C for four hour (at the definitive place), at this moment, if it's possible, apply two times (minimum) a vacuum in your container and replace the atmosphere by extra dry nitrogen or by extra dry argon (heavy weight than N2). Do not heat a closed container, it's necessary to have an open valve for eliminate excess of pressure.

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 01:15:56 (EDT)

Question number 1,270
An answer to Steven Glenn's question
What is the equation that describes the reaction of eggshells dissolving in vineager? I figure it is

Try to balancing equation with the major part of the solution: water

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 00:56:48 (EDT)

Question number 1,282
An answer to Sonya's question
Why is potassium more reactive than calcium, sodium and lithium? is

Because the size of the atom. The reactive electron is on last orbital (4s)and the nucleus is so far. Also the electronic ''cloud'' cause an electric shield between the nucleus (+) and the electron (-). All of the elements in this group IA are more reactive from the top (H) to the bottom of the periodical table (Fr). For the calcium, the 4s orbital is full, it'necessary to remove two electrons for access to a real stability energitic level,

This was posted by Donald Lavoie on
- Monday, July 10, 2000 at 00:49:49 (EDT)

Question number 1,253
An answer to saketh's question
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. is

You would use about a 1 alkaline

This was posted by julia ceser on
- Friday, June 23, 2000 at 22:35:19 (EDT)

Question number 1,255
An answer to Jayme Mathes's question
Where online can I try experiences,computerized,.Say like when i miz two things togather, It would show and tell me what happens? is

This was posted by on
- Friday, June 23, 2000 at 22:28:10 (EDT)

Question number 1,222
An answer to Alpha guy's question
I have a project to dry an enclosed container which is full of sand- no drains available. I can is

This was posted by on
- Sunday, June 18, 2000 at 13:14:56 (EDT)

Question number 830
An answer to Christie McElfresh's question
What is this number? 600,000,000,000,000,000,000,000 is

The number you have written is six hundred sextillion I believe.

This was posted by LRB on
- Saturday, June 17, 2000 at 15:03:23 (EDT)

Question number 1,001
An answer to buster's question
which inert gas produces which neon colors? is

I believe that neon makes red, argon makes blue, krypton makes orange, and I'm not too sure on the others.

This was posted by LRB on
- Saturday, June 17, 2000 at 14:57:09 (EDT)

Question number 1,205
An answer to Garth's question
Is the speed of light constant? is

Yes the speed of light is constant, depending on the medium in which it is travleing. For most physics and chem classes it is taken to be in a vaccum, and travels at 3x10^8 m/s

This was posted by Webmaster on
- Monday, June 05, 2000 at 21:52:14 (EDT)

Question number 1,079
An answer to Sainath R.'s question
Hi! Is potassium chloride used for melting ice on airport runways? is

yes

This was posted by andy on
- Tuesday, May 30, 2000 at 21:48:15 (EDT)

Question number 1,077
An answer to Bebe Cruzma's question
What is the pressure exerted by water vapor at sixteen degrees celsius? is

Use PV=nRT

This was posted by Sasha on
- Wednesday, May 24, 2000 at 02:14:43 (EDT)

Question number 1,111
An answer to Bill Conlon's question
What is "sodium dodecyl benzene sulfonate" and what is its use?. is

Sodium Dodecyl Sulphate (SDS) is a detergent and is used in biochemistry to denaturate proteins in gel electrophoresis (a tool to separate proteins by mol.weigth) I guess that SDBS is also a detergent. as for its use I don't know.

This was posted by Pierre Glauser Geneva Switzerland) on
- Tuesday, May 23, 2000 at 05:54:43 (EDT)

Question number 1,028
An answer to Leslie's question
What is the chemical compound of fire? is

Dudu

This was posted by Smart guy on
- Sunday, May 21, 2000 at 16:37:31 (EDT)

Question number 1,098
An answer to dave park's question
ummm I is

It is used for LYE. I work for Early California foods. I use caustic soda 30%. We break it down to 1.8% lye for the process of black ripe olives. We get our loads of sodium hydroxid from VanWaters&Rogers! Ithink they are based out of fresno Ca. If you need to know more E-mail me at TooMchtaHandle@webtv.net

This was posted by Mark on
- Wednesday, May 17, 2000 at 00:22:26 (EDT)

Question number 1,077
An answer to Bebe Cruzma's question
What is the pressure exerted by water vapor at sixteen degrees celsius? is

This was posted by on
- Tuesday, May 16, 2000 at 12:23:56 (EDT)

Question number 1,073
An answer to bret's question
this is cool that you get to ask a question and it will answer it! is

yes it is very cool

This was posted by Bebe Cruzma on
- Wednesday, May 10, 2000 at 20:03:31 (EDT)

Question number 1,068
An answer to Pei Fan Hsu's question
How I can doing the salt water spare test by myself? What chemical material I should buy? Thanks. is

This was posted by Pei Fan Hsu on
- Monday, May 08, 2000 at 15:54:07 (EDT)

Question number 1,066
An answer to Pei Fan Hsu's question
What is Cl2? is

This was posted by Pei fan Hsu on
- Monday, May 08, 2000 at 15:46:39 (EDT)

Question number 1,001
An answer to buster's question
which inert gas produces which neon colors? is

Red=neon, light green=oxygen, thats all i know

This was posted by Ryan Cites on
- Saturday, May 06, 2000 at 23:03:46 (EDT)

Question number 799
An answer to Guillermo's question
Where can I find information about acids, bases, and neutralization? is

any chemistry book in your local library would have the information. Just look in the indexIn most college chem books it is around ch. 13.

This was posted by bruce on
- Sunday, April 30, 2000 at 07:49:41 (EDT)

Question number 830
An answer to Christie McElfresh's question
What is this number? 600,000,000,000,000,000,000,000 is

This is known as Avogadros number. It takes this many atoms to make 1 mole of any element. This is the one characteristic that all the elements have in common. Your number is slightly off though. It is 6.022 times 10 raised to the twenty-third power.

This was posted by bruce on
- Sunday, April 30, 2000 at 07:46:46 (EDT)

Question number 830
An answer to Christie McElfresh's question
What is this number? 600,000,000,000,000,000,000,000 is

This was posted by bruce on
- Sunday, April 30, 2000 at 07:43:48 (EDT)

Question number 882
An answer to Christine's question
what do the p and H stand for in pH? is

pH stands for the "Power of the Hydrogen ion". This is very important because Hydrogen ions are acidic, where as Hydroxide ions are basic. This is why water has a neutral pH. It has one H ion and one OH ion. substances that are very acidic have low pH's. Substances with high pH's are basic. And of course water is neutral. I hope this answers your question.

This was posted by bruce on
- Sunday, April 30, 2000 at 07:37:44 (EDT)

Question number 963
An answer to Kendall Dolbec's question
Please would you give me some information on molybdenum. I is

This was posted by on
- Monday, April 24, 2000 at 10:09:33 (EDT)

Question number 896
An answer to e.k's question
why is aluminium chloride ionic rather than covalent? is

It is ionic because of the fact that when a non-metal reacts with a metal, the result becomes ionic. A covalent bond is one that shares its electrons, ionic does not. They form cations and anions. I hope this helps you...let me know!!

This was posted by Christine on
- Sunday, April 23, 2000 at 17:44:49 (EDT)

Question number 865
An answer to melissa 's question
I am currently taking the 2nd part of general college chemistry and my teacher said if we can explain to him why there is not a Ksp for NaCl, he will give us some extra points on our final grade. If someone could explain that to me I would greatly appreciate it. I think I know why, but I would like to be certain. thanks is

I think it's because Ksp is for insoluble substances and NaCl is soluble...

This was posted by Courtney on
- Thursday, April 20, 2000 at 18:24:32 (EDT)

I think it's because Ksp is for insoluble substances and NaCl is soluble...

This was posted by Courtney on
- Thursday, April 20, 2000 at 18:24:16 (EDT)

I think it's because Ksp is for insoluble substances and NaCl is soluble...

This was posted by Courtney on
- Thursday, April 20, 2000 at 18:23:51 (EDT)

Question number 822
An answer to Alejandro Caballero's question
Please help me to know or find the parafine density, thankyou. is

You just have to mesure the mass of your peace of parrafine. Then, you put it in water to find out the volume it displaces. Finally, you get the density by divising the mass by the volume.

This was posted by Sylvie on
- Wednesday, April 19, 2000 at 11:35:20 (EDT)

Question number 910
An answer to ARVINDER ANAND's question
THE ADSORPTION OF TIN(II)OXIDE ON GLASS BEADS is

OFF!

This was posted by TEJ on
- Wednesday, April 19, 2000 at 11:28:37 (EDT)

Question number 870
An answer to Lindsey's question
does anyone know the correct hybridisation of carbon in carbon dioxide. I would say sp because of resonance, but some of my professors say sp2 (while others say sp...) so which is it? is

I'm a chemistry teacher in Québec. There is no resonance possible in the carbon dioxide. The carbon does have 2 sigma links and 2 pi links. Hence, the hybridisation is sp.

This was posted by on
- Wednesday, April 19, 2000 at 11:26:51 (EDT)

Question number 830
An answer to Christie McElfresh's question
What is this number? 600,000,000,000,000,000,000,000 is

avogadros constant

This was posted by e.k on
- Saturday, April 15, 2000 at 14:11:07 (EDT)

Ksp means solubility product, there's no way you can dissolve something in a solid like NaCl...

This was posted by Christine on
- Friday, April 14, 2000 at 00:54:21 (EDT)

Question number 849
An answer to Larry Martin's question
I had a person ask me during a job interview if I know what NOx was. No clue, can you help? is

It in a general formula used to bescribe all the different nitrogen oxides which exists, for instance N2O or dinitrogen oxide (laughting gas). Although this compound oviously seems quiet harmless it will infact kill you if inhaled in large quantities. Many nitrogen oxides such as NO2 or nitrogen dioxide which is a brown gas formed when concentrated nitric acid reacts with various other compounds (such as during nitration) is very toxic indeed and may easily cause severe lung damage. An other place in which NOx may be found is in ar exhaust where it poses a cerious cancer risk.

This was posted by Leon on
- Thursday, April 13, 2000 at 08:47:04 (EDT)

Question number 849
An answer to Larry Martin's question
I had a person ask me during a job interview if I know what NOx was. No clue, can you help? is

In environmental chemistry, NOx, refers to a large range of nitrogen and oxygen containing compounds, with x representing an integer. Many of these compounds are pollutants that are removed by various means.

This was posted by chemweb webmaster on
- Monday, April 03, 2000 at 19:07:26 (EDT)

Question number 322
An answer to Sean's question
I have to do an element project in pre-ap Chemistry. I have to create an ornament that somehow represent the element Platinum. Have any ideas? is

A Diamond ring, Platinum is what holds the diamons in.

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:38:31 (EST)

Question number 795
An answer to Guillermo's question
How can I identify the difference between an acid and a base when they are located in different compounds? is

An acid's ph is below 7, a base is above 7

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:27:52 (EST)

Question number 143
An answer to CHANDLER's question
TRIDIUM - DOES ANYONE KNOW HOW I CAN FIND SOME INFO. ON THIS. is

Try the net, Microsoft Encarta, or the periodic table.

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:20:34 (EST)

Question number 137
An answer to John Grimes's question
Could you please tell me what chemicals make up a typical sample of sunblock lotion? is

Look at the ingredients.

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:16:53 (EST)

Question number 172
An answer to Donna Tolbert's question
Where can I get information on vinyl-benzene? is

Look in an encyclipedia, if there's nothing try Dogpile.com and do a search on vinyl-benzene.

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:16:06 (EST)

Thats probably cuz of the atomic weight and atomic mass. I'm only 11 so if you get an F don't blame me.

This was posted by Chem Guy on
- Saturday, April 01, 2000 at 21:14:15 (EST)

Question number 838
An answer to trish's question
How do I get rid of the silver coating from the back of a mirror,(besides scraping it off is

This was posted by on
- Thursday, March 30, 2000 at 20:12:46 (EST)

Question number 317
An answer to justin's question
what does the element Be stand for on the periodic table? is

Beryllium

This was posted by on
- Monday, March 27, 2000 at 19:32:10 (EST)

Question number 323
An answer to Devon Toombs's question
what is tungsten also where can i find it ? cause I know it is

It's element number 74, symbol "W" gammsarah@yahoo.com

This was posted by on
- Monday, March 27, 2000 at 19:30:57 (EST)

Question number 323
An answer to Devon Toombs's question
what is tungsten also where can i find it ? cause I know it is

It's element number 74, symbol "W" gammsarah@yahoo.com

This was posted by on
- Monday, March 27, 2000 at 19:30:18 (EST)

Question number 328
An answer to Dylan Smith's question
How many of the 118 elements in the Periodic Table occur naturally? is

90 gammsarah@yahoo.com

This was posted by ~Sarah~ on
- Monday, March 27, 2000 at 19:28:42 (EST)

Question number 331
An answer to Jon Chapman's question
How is the order of elements in chemical formulas established? Why does Hydrogen come before Oxygen in the chemical formula for water? Are there rules you can follow to do it correctly? is

metals come before nonmetals

This was posted by ~Sarah~ on
- Monday, March 27, 2000 at 19:27:32 (EST)

Question number 336
An answer to Dustin Benton's question
I am in desperate need of help. I is

if you excite the atoms, they each give off a different color spectrum. E-amil me gammsarah@yahoo.com for more help!

This was posted by on
- Monday, March 27, 2000 at 19:19:01 (EST)

Question number 337
An answer to stlvia's question
what is the difference between mendeleev is

E-mail me. I don't have time now, but I CAN answer that questions! gammsarah@yahoo.com

This was posted by on
- Monday, March 27, 2000 at 19:17:36 (EST)

Question number 341
An answer to joanna janetakis's question
what is electron conifiguration? is

It is an easy way to organize the electrons. It tells you how many are on each energy level. (E.g. C=1s2 2s2 2p2 (the numbers after the letters are up above) Carbon is number 6, so 2+2+2=6) gammsarah@yahoo.com <- if you need more help!

This was posted by on
- Monday, March 27, 2000 at 19:16:29 (EST)

Question number 347
An answer to Michelle's question
This is probably ALL VERY basic, but--The Atomic Number is equal to the number of Protons in the nucleus of an atom. So if the Atomic Number for silver is 47, then silver has 47 protons. And the number of protons is equal to the number of electrons, so silver also has 47 elctrons, correct? However, silver is

Yes it is all correct! The 47 protons are in the nucleus, along with the 61 neutrons. The 47 electrons are orbiting around the nucleus.

This was posted by on
- Monday, March 27, 2000 at 19:13:21 (EST)

Question number 352
An answer to Neil Cohen's question
I was wondering if you could tell me how HCl is produced and where it is found? Thanks is

It is not found naturally. You have to combine, using ionic bonding, one Hydrogen atom and one Chlorine atom.

This was posted by on
- Monday, March 27, 2000 at 19:10:53 (EST)

Question number 366
An answer to corrine mccarthy's question
i am presently a 7th grade student taking a prechemistry class and having difficulty understanding the basis for the development of the periodic table of elements. please explain why the periodic table was developedby arranging elements in increasing atomic number rather than atomic mass. is

The periodic table was developed by atomic number, rather than atomic mass, because the atomic number is the same as the number of electrons in the element. Elements in the same family have the same number of valence electrons, therefore they have some similiar chemical properties. gammsarah@yahoo.com

This was posted by Sarah on
- Monday, March 27, 2000 at 19:09:11 (EST)

Question number 503
An answer to Katie Gualtieri's question
I hope that your site can help me with my problem! ~I have to write a research paper on chemical reactions, and I was wondering what chemical reactions are commonly used in cooking? In our paper we have to address examples of how chemical reactions are used in everyday life. Any help would be greatly \ appreciated!~ If it can, it is

cooking is a chemical reaction in it's self.

This was posted by on
- Monday, March 27, 2000 at 19:02:00 (EST)

Question number 518
An answer to annette's question
At what temperature does the fahrenheit scale and the celsius scale have the same numerical value? is

-40*C is equal to -40*F (go to http://www.sciencemadesimple.com/temperature.html) E-mail me if this helps gammsarah@yahoo.com

This was posted by on
- Monday, March 27, 2000 at 19:00:58 (EST)

Question number 518
An answer to annette's question
At what temperature does the fahrenheit scale and the celsius scale have the same numerical value? is

-40*C is equal to -40*F

This was posted by on
- Monday, March 27, 2000 at 18:59:53 (EST)

Question number 544
An answer to Eric's question
2nd grader. In my science fair experiment, adding salt to ice made it melt faster. Is there an explanation (that I or my mom could understand)? is

i think the salt emits (gives off) heat.

This was posted by on
- Monday, March 27, 2000 at 18:52:30 (EST)

Question number 565
An answer to Cyberman's question
What is the solution that makes copper look like silver is

My science teacher did that on April 1st last year to make us think that he could turn a copper penny into silver. He said him and another guy from Germany had discovered a solution that could actually do it. We all believed him, too, but it only looks like silver. E-mail me and I may be able to find out for you. gammsarah@yahoo.com

This was posted by Sarah on
- Monday, March 27, 2000 at 18:50:27 (EST)

Question number 695
An answer to justin thames's question
What is the only element that is less dense as a solid than as a liquid? is

water is like that. That's why ice floats are not sinks!

This was posted by on
- Monday, March 27, 2000 at 18:43:10 (EST)

Question number 701
An answer to Amanda's question
what does the element carbon look like? is

it's black!

This was posted by on
- Monday, March 27, 2000 at 18:41:52 (EST)

Question number 766
An answer to Dena Stark's question
Please help me- I am having a problem converting moles to grams. ex: if you have 18g of Na how many grams of O2 does it take to make a reaction . (2NaO2) is

This was posted by on
- Sunday, March 12, 2000 at 19:55:40 (EST)

Question number 756
An answer to Regina Gorenshteyn's question
Does anyone know what would make a good surfactant such that it resides in decane and surrounds water drops? Thanks Regina is

Oil or anti freezz

This was posted by Dameon on
- Sunday, March 12, 2000 at 16:48:38 (EST)

Question number 759
An answer to Syncerie Frazier's question
I is

This was posted by on
- Saturday, March 11, 2000 at 11:16:41 (EST)

Question number 751
An answer to darsh's question
good is

bad

This was posted by jane on
- Thursday, March 09, 2000 at 16:11:56 (EST)

Question number 721
An answer to Kermeen's question
A great informative website. is

This was posted by on
- Sunday, March 05, 2000 at 00:49:51 (EST)

Question number 701
An answer to Amanda's question
what does the element carbon look like? is

This was posted by on
- Wednesday, March 01, 2000 at 17:11:58 (EST)

Question number 700
An answer to Amanda's question
i have none is

none

This was posted by on
- Wednesday, March 01, 2000 at 17:09:46 (EST)

Question number 685
An answer to kelly's question
no comment is

This was posted by kel on
- Sunday, February 27, 2000 at 18:04:18 (EST)

Question number 685
An answer to kelly's question
no comment is

This was posted by on
- Sunday, February 27, 2000 at 18:03:30 (EST)

Question number 625
An answer to Haley's question
what is the basis for positioning elements within the table is

The setup of the periodic table is based on the numberm of protons the elements have.

This was posted by jay on
- Wednesday, February 16, 2000 at 18:54:54 (EST)

Question number 619
An answer to Janelle Young's question
I am hoping that your answers to my queries will help me understand some problems I am having with my chemistry. is

This was posted by on
- Wednesday, February 16, 2000 at 04:09:44 (EST)

Question number 594
An answer to Linda Davis's question
I need to know if regular table salt is better at melting ice than rock salt or calcium chloride. How can I find that out? Is there an experiment I can do? thanks. is

My chemistry teacher told me that calcium chloride is better because it keeps the water from refreezing.

This was posted by jay on
- Tuesday, February 15, 2000 at 18:30:12 (EST)

Question number 317
An answer to justin's question
what does the element Be stand for on the periodic table? is

Berillium

This was posted by David on
- Tuesday, February 15, 2000 at 03:39:59 (EST)

Question number 324
An answer to Daniel Jones's question
Why is water denser when it is a liquid than when it is a solid? is

When water freezes, the crystal lattice rearranges itself in an octahedronic (I think) shape. This is bigger than the water molecule's normal lattice.

This was posted by David on
- Tuesday, February 15, 2000 at 03:38:27 (EST)

Question number 364
An answer to connie's question
why is ice appear to be cloudy?? is

When water freezes, the H2O molecules rearrange themselves in another crystal lattice form - this is bigger than the normal H2O form, thus the ice expands and forms tiny cracks. This causes the 'cloudy' effect.

This was posted by David on
- Tuesday, February 15, 2000 at 03:30:35 (EST)

Question number 429
An answer to kasia's question
I would like to know if carbon dioxide is soluble in water and if it is, how soluble (very or just slightly) is

It is very soluble, and forms H2CO3, which is a weak acid.

This was posted by David on
- Tuesday, February 15, 2000 at 03:25:37 (EST)

Question number 521
An answer to David Ames's question
Does red phosphorous ignite when it comes into contact with oxygen is

Not sure, but yellow P does.

This was posted by on
- Tuesday, February 15, 2000 at 03:19:58 (EST)

Question number 549
An answer to gary clark's question
on the periodic table of elements how do i convert grams into molar mass? how many moles are in 25g of NaCl? is

Use the formula n = M/m Where n = molar mass, M = atomic mass of molecule and m = mass in grams. Good luck

This was posted by David on
- Tuesday, February 15, 2000 at 03:18:11 (EST)

Question number 597
An answer to Linda Davis's question
What is the difference between table salt and rock salt? is

This was posted by on
- Monday, February 14, 2000 at 14:29:45 (EST)

Question number 587
An answer to Ulysses Soto's question
What is the name of C3H8O ? is

This was posted by ulysses Soto on
- Thursday, February 10, 2000 at 07:53:53 (EST)

Question number 586
An answer to Ulysses Soto's question
Can you answer now? is

This was posted by on
- Thursday, February 10, 2000 at 07:51:30 (EST)

Question number
An answer to 's question
is

This was posted by on
- Saturday, February 05, 2000 at 10:45:08 (EST)

Question number
An answer to 's question
is

This was posted by on
- Saturday, February 05, 2000 at 10:40:54 (EST)

Question number 549
An answer to gary clark's question
on the periodic table of elements how do i convert grams into molar mass? how many moles are in 25g of NaCl? is

sorry its 25/ 58.5 Molar m of NaCl = 58.5 I can't add!!!

This was posted by Selena on
- Saturday, February 05, 2000 at 10:29:06 (EST)

Question number 549
An answer to gary clark's question
on the periodic table of elements how do i convert grams into molar mass? how many moles are in 25g of NaCl? is

There are 23/60.5 moles in NaCl. Amount of moles = number of grams / mass of 1 mole. Mass of 1 mole of Na = 23g Mass of 1 mole of chlorine = 35.5g Mass of 1 mole of NaCl = 35.5 + 23

This was posted by Selena on
- Saturday, February 05, 2000 at 10:27:06 (EST)

Question number 349
An answer to jackie saunders's question
In the formula for acid rain what chemical compound is SO3? is

sulfur oxide

This was posted by on
- Tuesday, February 01, 2000 at 20:35:13 (EST)

Question number 546
An answer to gary clark's question
how many moles are in 25g of NaCl? is

This was posted by gary clark on
- Sunday, January 30, 2000 at 21:52:24 (EST)

Question number 541
An answer to t kaye's question
what is the formula of heavy water? is

D2O Where D is Deuterium, which is the Hydrogen isotope with mass number 2

This was posted by JD on
- Saturday, January 29, 2000 at 09:46:25 (EST)

Question number 429
An answer to kasia's question
I would like to know if carbon dioxide is soluble in water and if it is, how soluble (very or just slightly) is

I belive that it is a little bit not very much at all though You would have to use an equation and solubity constants to figure out how soluble it is. On reason why it is not very soluble is because what has H bonds and CO2 has covaliant bonds. A general rule is like disloves like. Covalient dissolves covalient, ionic dissolves ionic and so fourth

This was posted by David Ames on
- Wednesday, January 26, 2000 at 15:32:00 (EST)

Question number 434
An answer to melly's question
To 225mL, of a 0.80M solution of KCl, a student adds enough water to make 1.0L of a more dilute KI solution. What is the molarity of the new solution? is

find the number of moles of K used and thats the new molarity. So the molarity is .18M

This was posted by David Ames on
- Wednesday, January 26, 2000 at 15:27:36 (EST)

Question number 475
An answer to Jim's question
I have a brass tube which has an ID of 1/4 inch and is 5/8 inch in length. I want to fill this space with a substance that will weigh @ 14 grams. is

You could use some polyvinal I think that's the stuff. Like the stuff used in insulating houses and around pipes it's like a foam that hardens.

This was posted by David Ames on
- Wednesday, January 26, 2000 at 15:18:45 (EST)

Baking soda and baking powder are two chemicals that are used in cooking.

This was posted by David Ames on
- Wednesday, January 26, 2000 at 15:14:20 (EST)

Question number 507
An answer to dilly's question
what are some uses for the liquid iodine is

Disineffecting Chromatogaraphy

This was posted by David Ames on
- Wednesday, January 26, 2000 at 15:06:22 (EST)

Question number
An answer to 's question
is

This was posted by on
- Tuesday, January 18, 2000 at 07:43:06 (EST)

Question number 370
An answer to David Armstrong's question
I need to know three alkanes in gasoline is

octane, heptane, nonane...maybe hexane instead on nonane.....octane and heptane for sure though

This was posted by epi on
- Wednesday, January 12, 2000 at 20:12:04 (EST)

This was posted by corrine mccarthy on
- Sunday, January 09, 2000 at 13:13:34 (EST)

Question number 357
An answer to Ben Learned's question
thanks? is

This was posted by on
- Saturday, January 08, 2000 at 21:32:00 (EST)

This was posted by on
- Thursday, January 06, 2000 at 17:19:58 (EST)

Question number 337
An answer to stlvia's question
what is the difference between mendeleev is

More atoms have been discovered and added on to the new table.

This was posted by Andrew Einstein on
- Friday, December 17, 1999 at 09:31:26 (EST)

Question number 338
An answer to Thomas's question
How does the electrophil addition work in detail? Why are ions created in the reactions? is

For 2nd Question: Because electrons are always added on to a atom or taken away.

This was posted by Andrew Irizarry on
- Friday, December 17, 1999 at 09:27:27 (EST)

Question number 317
An answer to justin's question
what does the element Be stand for on the periodic table? is

Beryllium

This was posted by Thomas on
- Thursday, December 16, 1999 at 08:14:26 (EST)

Question number 315
An answer to Morgan 's question
I am doing a project on chromotography. I am separating th pigments in leaves and i am using the chemicle acetone to do this. Why does acetone separtate the pigments in leaves? Is there some connection that I am overlooking? is

If you are using chromatography to seperate the pigments of leaves, and you are using acetone as your solvent (mobile phase), then what are you using as your stationary phase? Are you using paper or a glass column packed with silica or similar? Whichever way, what you are looking at is the relative affect of the leaf pigments being more or less soluble in the acetone, or having more or less affinity with the stationary phase (silica or paper. The more affinity a pigment has with the stationary phase, the longer it will stay on the column, or the less distance it will travel up a sheet of chromatograpghy paper. The more affinity that the pigment has with the acetone, the quicker it will come off the column, or the further up the paper it will travel. If you want more detailed explanations, then About.com have a good reference site. If you are interested in the history of chromatography, and the guy whose experiment you are repeating (his name was Tswett), mail me at alison.weston@care4free.com, and I can give a history lesson!

This was posted by Alison Weston on
- Monday, December 13, 1999 at 11:24:16 (EST)

Question number 323
An answer to Devon Toombs's question
what is tungsten also where can i find it ? cause I know it is

This was posted by Devon Toombs on
- Monday, December 13, 1999 at 09:18:03 (EST)

Question number 316
An answer to Wilma Dooit's question
What is a poly-N-vinylcarboxylic acid amide-base cross-linked resin? is

What's Neutralization

This was posted by Andre on
- Monday, December 06, 1999 at 14:40:37 (EST)

Question number 311
An answer to Cara's question
What is the percent sodium chloride found in serum (not whole blood)? And is 900mg NaCl in 100mL water a 0.9% NaCl solution? is

well i missread the question before...i thought it said a 9% solution...so as my calculations showed on the other posting....yes it is a .9% solution weight per weight

This was posted by emily burdick on
- Thursday, December 02, 1999 at 00:47:16 (EST)

Question number 303
An answer to elaine gipson's question
what is the valence number of iron? is

iron can have a charge of either two or three...so there are two possible valences....2,3...there are a few other possible valences that almost never happen..typically iron is 2 or 3

This was posted by emily burdick on
- Wednesday, December 01, 1999 at 20:57:46 (EST)

Question number 311
An answer to Cara's question
What is the percent sodium chloride found in serum (not whole blood)? And is 900mg NaCl in 100mL water a 0.9% NaCl solution? is

i don't know the first one, but the answer to the second one is no...water has a density of .997 under STP..which means that 100-ml of water is 99.7 grams....and 900 mg of NaCl is .9 grams...so there is a total of 100.6 grams...weight per weight this situation is .9/100.6 x 100%= .89% solution

This was posted by emily on
- Wednesday, December 01, 1999 at 20:46:06 (EST)

Question number 313
An answer to Will's question
What is the full chemical name for the Organic compound Tryptophane? is

if tryptophane is the same as tryptophan....then it is l-alpha-Aminoindole-3-propionic acid

This was posted by emily burdick on
- Wednesday, December 01, 1999 at 20:34:46 (EST)

Question number 301
An answer to Cim Martz's question
How do you find out the hybridization of atoms in structures such as: oxygen in water, nitrogen in ammonia, carbon in methylene chloride (CH2Cl2), phosphorous in phosphorous pentafluoride? Thanks. is

one way is to look at their lewis structures..for example water.... H-O-H...but the oxygen also has two pairs of electrons....therefore there are four bonds whether they be with electrons or molecules ...4 bonds means sp3 hybridization

This was posted by on
- Wednesday, December 01, 1999 at 15:41:58 (EST)

Question number 300
An answer to greg's question
What is in the parssimon fruit that so severely parches my mouth throat and insides when I eat them? is

maybe it's not ripe...they can be poisoness you know...the parssimons i have eaten are fine.....maybe it's just you

This was posted by on
- Wednesday, December 01, 1999 at 15:39:44 (EST)

Question number 283
An answer to Holly's question
Could you please tell me the formula for converting molar mass into grams. is

molar mass is already in a gram/mol form..if you know how many moles you start with.....take for instance if you had 1 mol of bromine gas (Br2) then the equation would be 1 mol Br2 x 159.8g/1 mol of Br2......if it was just 1 mol of elemental Br (Br) then it would be 1 mol Br x 79.904 g/ 1 mol Br

This was posted by emily on
- Wednesday, December 01, 1999 at 15:37:35 (EST)

Question number 262
An answer to angela Mietzner's question
How many grams do 5.0 * 10 to the 20th molecules of aspirin C9H8O4 weigh? is

5.0 x 10 e20 molecules * 1mole/6.022 x 10 e23 molecules * 180 g/ 1 mol = .1495g

This was posted by emily on
- Wednesday, December 01, 1999 at 15:31:51 (EST)

Question number 292
An answer to Niamh Hensman's question
what is the product when vanadium 2 sulphate reacts with sodium hydroxide? is

AN EXPLOSION

This was posted by on
- Wednesday, November 24, 1999 at 10:45:23 (EST)

Question number 284
An answer to LOBNA ABDEL REHIM's question
PLEASE SEARCH ABOUT K.SHRIVASTAVA AND J.K.MAHROTRA, INDIAN J. APPL.CHEM.,1969,32,116. is

This was posted by on
- Friday, November 12, 1999 at 22:57:55 (EST)

Question number 283
An answer to Holly's question
Could you please tell me the formula for converting molar mass into grams. is

This was posted by on
- Tuesday, November 09, 1999 at 18:48:03 (EST)

Question number 263
An answer to DENISE R. RICHARDSON's question
what is an occupational hazzard of a chemist is

chemist don't get the respect they have earned in the science world

This was posted by james saul tilghman on
- Saturday, October 30, 1999 at 21:05:35 (EDT)

Question number 261
An answer to Rodney D. Welch's question
Can you give me an unbalanced equation and the balanced equation and email me the results back to rodwelch93@yahoo.com for each of the following formulas: A) sulfuric acid + potassium hydroxide B) magnesium + copper (II) nitrate C) dinitrogen trioxide + water D) calcium hydroxide + sulfur dioxide E) barium oxide + water F) sodium hydroxide solution + aluminum chloride solution G) carbon dioxide + sodium oxide H) calcium oxide + hydrocloric acid I) aluminum + sulfur J) barium carbonate + heat K) sodium chloride solution + ammonium nitrate solution is

This was posted by on
- Thursday, October 28, 1999 at 12:16:38 (EDT)

Question number 261
An answer to Rodney D. Welch's question
Can you give me an unbalanced equation and the balanced equation and email me the results back to rodwelch93@yahoo.com for each of the following formulas: A) sulfuric acid + potium hydroxide B) magnesium + copper (II) nitrate C) dinitrogen trioxide + water D) calcium hydroxide + sulfur dioxide E) barium oxide + water F) sodium hydroxide solution + aluminum chloride solution G) carbon dioxide + sodium oxide H) calcium oxide + hydrocloric acid I) aluminum + sulfur J) barium carbonate + heat K) sodium chloride solution + ammonium nitrate solution is

.15 grams

This was posted by Amm511@aol.com on
- Wednesday, October 27, 1999 at 23:01:16 (EDT)

Question number 251
An answer to Tom Gressle's question
what is the structural formula for ethyl ether? is

CH3OCH3, same as diehtyl ether

This was posted by russell simmons on
- Monday, October 25, 1999 at 15:24:35 (EDT)

Question number 212
An answer to Kevin's question
I have a product that stabilizes lead in soil. I have successfully treated heavily contaminated soils to levels below the EPA requirement. That is, the leachable lead in an acidic (acetic to pH 4.8) EPA solution is below 5 ppm. We have just found, to our surprise, that the leachable lead in deionized water or tap water is significantly higher than the lead in the acidic solvent. How can this be explained? is

This was posted by on
- Friday, October 22, 1999 at 10:51:05 (EDT)

Question number 237
An answer to Nick's question
Why is the triphenylmethyl cation so stable at room temperature, while other cations are not? is

triphenyl methyl cation is so stable, because the cation has many resonance forms, which act to stabalize the charge

This was posted by Allen Herbst on
- Sunday, October 17, 1999 at 00:40:37 (EDT)

Question number 225
An answer to Brian's question
how much wood could a woodchuck chuck if a woodchuck could chuck wood? is

A woodchuck would chuck as much as a woodchuck could chuck if a woodchuck could chuck wood.

This was posted by on
- Sunday, October 10, 1999 at 22:57:35 (EDT)

Question number 235
An answer to aDee's question
what is pH stands for? is

Ph stands for the acidity or neutrality of something, for example water has a ph of 7, which is a neutral ph.

This was posted by John Due on
- Sunday, October 10, 1999 at 17:57:49 (EDT)

Question number 233
An answer to kcchris35@hotmail.com's question
How can I convert an oil soluble plant extract into a water soluble? is

This was posted by chris on
- Friday, October 08, 1999 at 14:18:16 (EDT)

Question number 210
An answer to Jeff Denholtz's question
What does the word "Hydrated" mean when it appears before a chemical ? EXAMPLE: "Hydrated Silica" Does this mean that silica contains nonreactive water ? is

This was posted by on
- Friday, October 08, 1999 at 14:14:31 (EDT)

Question number 223
An answer to cory's question
what is the mass of one mole of water? is

18g. Add the mass of oxygen (16g) to the mass of two hydrogen (1+1g) giving you 18g.

This was posted by Karen on
- Friday, October 08, 1999 at 13:17:22 (EDT)

Question number 225
An answer to Brian's question
how much wood could a woodchuck chuck if a woodchuck could chuck wood? is

Dunno, chuck! As much as it has to!

This was posted by on
- Friday, October 08, 1999 at 13:14:10 (EDT)

Question number 231
An answer to eddy seng's question
1.)what is the chemical name for mercury?? 2.)what is the actual weight of an carbon atom?? is

1) The chemical symbol for mercury is Hg. 2)The weight of 6x10(23) (this is in standard form - check Avogadro's constant)carbon atoms is 12g. So it works out that the weight of a single carbon atom is 12 divided by 6x10(23) which is 2x10(-23)g. It's a really tiny number!

This was posted by Karen on
- Friday, October 08, 1999 at 13:03:51 (EDT)

Question number 227
An answer to Karen's question
Does anybody have a clue about the purification of acetanilide by crystallisation using decolourising charcoal? I think that the charcoal reduces the acetanilide, but are any impurities simply boiled out? Please let me know how far out I am in the explanation! is

The impurity you're asking about is probably methylene blue (the solution is blue when the acetanilide is added). The charcoal adsorbs the coloured particles of methylene blue, leaving you with a relatively pure sample of acetanilide which you then recrystallise out.

This was posted by Kazza on
- Thursday, October 07, 1999 at 14:56:30 (EDT)

Question number 225
An answer to Brian's question
how much wood could a woodchuck chuck if a woodchuck could chuck wood? is

What is the shape of Copper Crystals

This was posted by Kiana on
- Tuesday, October 05, 1999 at 18:34:57 (EDT)

Question number 223
An answer to cory's question
what is the mass of one mole of water? is

18 grams

This was posted by smart on
- Tuesday, October 05, 1999 at 15:26:10 (EDT)

Question number 221
An answer to peggy's question
What are the general basics of chemical reactions occurring in the human body as a result of exercise. If you know any websites it would also help. Thanks in advance. is

This was posted by on
- Sunday, October 03, 1999 at 09:49:34 (EDT)

Question number 216
An answer to Renee's question
How would you go about getting a Gram formaula Mass of H2SO4?Also how would you calculate the Molecular Mass for the same molecule is

2h so-2 4

This was posted by jim on
- Thursday, September 30, 1999 at 15:07:06 (EDT)

Question number 199
An answer to Sara's question
What is a rate? We are studying Physical Science in 8th grade this year, and I need to find out what a rate is in chemsitry. Thank you is

For a short summary, please look at Lessons-->Book 2-->Kinetics. Rate of reactions is part of Kinetics.

This was posted by John on
- Thursday, September 23, 1999 at 15:15:39 (EDT)

Question number 208
An answer to greg.parks@us.abb.com's question
I am doing a project on chemiluminescence, and have several questions:1) are there chemiluminescent reactions that make colors other than the typical yellow-green?2) if yes what are they and what colors do they make?3) are the lightsticks toxic, and how should we dispose of them?Thank you is

Yes, there are chemiluminescent reactions that are not yellow-green. I have forgotten what they are, but I remember doing an experiment where the chemical glowed bright blue. Sorry I cant remember specifics.

This was posted by John on
- Thursday, September 23, 1999 at 15:10:33 (EDT)

Question number 194
An answer to Juan Terriquez's question
What does chemestry has to do with computer hardware? is

Chemistry has a lot to do with computer hardware. Especialy semiconductors and such. Chemists have been working with computer and electrical engineers to find materials that conduct better, such as silicon. So most chemistry is done at a base level lower than circuit design

This was posted by Keith on
- Saturday, September 18, 1999 at 16:48:18 (EDT)

Question number 183
An answer to Aurora's question
Can you relate a property of the element Nobium or Nb directly to a use of the element . is

This was posted by on
- Friday, September 10, 1999 at 11:36:04 (EDT)

Question number 178
An answer to Balameddine's question
Can you please provide me informations about quasi crystals: their use,properties and their compositions. is

Can you please provide me informations about quasi crystals: their use,properties and their compositions.

This was posted by Balameddine on
- Friday, September 03, 1999 at 11:30:05 (EDT)

Question number 178
An answer to Balameddine's question
Can you please provide me informations about quasi crystals: their use,properties and their compositions. is

Can you please provide me informations about quasi crystals: their use,properties and their compositions.

This was posted by Balameddine on
- Friday, September 03, 1999 at 11:30:05 (EDT)

The CAS number for butyl stearate is123-95-5. If you go to the followingweb page and type in this CAS number,you will get some good info on this chemical. The web page is: http://www.chemfinder.com/

This was posted by Pat on
- Thursday, September 02, 1999 at 09:25:04 (EDT)

Question number
An answer to 's question
is

This was posted by on
- Monday, August 30, 1999 at 15:01:20 (EDT)

Question number 170
An answer to k r sarkar's question
What are the uses of 1-phenyl-4-methyl-3-pyrazolidone is

Can i use Methyl Paraban and Propyl Paraban as food preservative. If yes then kindly indicate maximum percentage at which it is safe to be used.

This was posted by k r sarkar on
- Sunday, August 29, 1999 at 07:03:57 (EDT)

Question number 165
An answer to tatine's question
period three: why is it that sodium oxide reacts with water while magnesium oxide is barely soluble , aluminium oxide and silicon oxide insoluble while phosphorus oxide is soluble?Has this got to do with their bonding? is

This was posted by on
- Sunday, August 22, 1999 at 10:40:28 (EDT)

Question number 148
An answer to Binu's question
What is the reason salt enhances food? What chemical in salt causes this to happen?Can this chemical be separated from salt? is

Common Table salt is an Ionic Compound consisting of the Elements Sodium and Clorine, there are no other chemicals. I'm not sure why it enhances the taste of food.

This was posted by Brian on
- Tuesday, July 13, 1999 at 09:25:04 (EDT)

Question number 146
An answer to delta's question
about physical properties of mitoxantrone is

This was posted by on
- Tuesday, July 06, 1999 at 10:23:26 (EDT)

Question number 138
An answer to Jeremiah & Matt's question
What are the benifits of chemistry? is

2 words: Ther mite

This was posted by Mynock on
- Thursday, June 10, 1999 at 13:31:14 (EDT)

Question number 135
An answer to Bryan's question
What gas is released when vinegar is mixed withbaking soda? I am trying to help a friend whose daughteris doing a grade school science lab. Thanks for your help.Bryan is

Carbon Dioxide (CO2)

This was posted by Jim on
- Thursday, June 03, 1999 at 05:17:18 (EDT)

Question number 131
An answer to Tom's question
The reaction of diamond to graphite is an exothermic reaction.Why doesnt the reaction ever occur spontaneously? is

The reaction of diamond to graphite is spontaneous at standard temp. and pressure. Although this reaction is thermodynamically favored, it is NOT kinetically favored (it takes a long time for diamond to change into graphite).

This was posted by Steve on
- Saturday, May 01, 1999 at 20:57:27 (EDT)

Question number 9
An answer to 's question
Why is the earth round? is

This was posted by on
- Friday, April 30, 1999 at 21:25:52 (EDT)

Question number 121
An answer to Margarida's question
I want to know what are chaotropic salts. is

This was posted by on
- Thursday, April 08, 1999 at 10:42:14 (EDT)

Question number 118
An answer to Kenna Bolton's question
I am looking for the chemical strutctures of dicetyledimonium chloride, polysorbate 20, tetrasodiium EDTA, and DMDM hydantoin. If anyone knows the structures or different names for these chemicals I might find more useful it would be greatly appreciated. Thanks! is

You may want to try www.chemfinder.com

This was posted by on
- Monday, March 29, 1999 at 22:29:11 (EST)

Question number 117
An answer to Erecia's question
does anyone know how to find the volume in liters at STP for 3.0 mole of Ar? is

67.2 LThere is 22.4 liters in one mole at STP.

This was posted by Lindsay on
- Monday, March 29, 1999 at 22:24:30 (EST)

Question number 115
An answer to george's question
what is kinetic stability is

Kinetic stability means that a reaction will go very slowly from reactants to products. For example, thermodynamically, diamond (a form of carbon) spontaneously turns into graphite (another form of carbon). Diamond is said to be thermodynamically unstable for this reason. Although it is thermodynamically unstable, it is said to be kinetically stable, because it takes a very long time for diamond to turn into graphite.

This was posted by Steven Stoker on
- Sunday, March 28, 1999 at 03:47:11 (EST)

Question number 116
An answer to Kate's question
where can i find a site that will give me information about moles. I need to know such things as when and who discoved the mole, its name orgin, and uses. is

Try this, hope it helps:http://www.chemistry.co.nz/mole.htm

This was posted by John C on
- Thursday, March 25, 1999 at 21:45:00 (EST)

Question number 102
An answer to Kathy's question
I have asked several experts and have received no answer thus far. While I am aware of the fact that adding salt to ice lowers its temperature, I haven is

Adding salt to ice doesn't lower its temperature. Rather, it lower the freezing point of water. This happens when you add any solute (the salt) to a solvent (the water, or ice).

This was posted by Steven Stoker on
- Sunday, February 21, 1999 at 17:52:47 (EST)

Question number 98
An answer to Nick's question
Each FRH (Flameless ration Heater) contains 8.1 gmagnesiu. Asuming this magnesium reactscompletly,howmany grams of hydrogen gas are produced is

This was posted by on
- Tuesday, February 09, 1999 at 20:17:07 (EST)

Question number 90
An answer to Alesha's question
What is the highest number of electrons that can be found in a single energy level, and how many energy levels are there in all? is

the answer is 14(the f orbital)

This was posted by Dan on
- Sunday, February 07, 1999 at 23:00:25 (EST)

Question number 60
An answer to ashleigh edelsohn's question
what effect will the addition of a variety of solutes have to the boiling point of a liquid? I am starting with 2 cups ofwater and adding small amounts of solutes such as honey, detergent, salt, baking powder, baking soda, wine, anti-freeze, vegetable oil, etc. and looking for the effect on the boiling point. I need some guidance as to what I can expect, and if I am doing this kind of experiment properly. What should I exp ect. I am measuring the temperature and recording at the point at which the solution is boiling, but it doesn is

When solvents are added to a solution, the boiling point is elevated. So, if you added solutes to water, the solution should boil at a temperature greater than 100 C.

This was posted by Steven Stoker on
- Thursday, January 21, 1999 at 22:12:57 (EST)

Question number 59
An answer to JudithMDW's question
What is the ingredient in laundry detergents that best enables them to clean dirt and stains? Do manufacturers list that ingredient first on products that contain the most of it? is

I believe the component is phosphorus and bleach.

This was posted by ashleigh on
- Thursday, January 21, 1999 at 20:56:27 (EST)

Question number 57
An answer to me's question
what is orbital notation? is

Orbital notation refers to energy levels that the electrons in a given atom occupy. For example, Hydrogen's orbital notation is 1s^1 . Calcium's is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

This was posted by Steven Stoker on
- Wednesday, January 20, 1999 at 20:04:10 (EST)

Question number
An answer to Priscilla's question
Can any one answer this question apiece of wood from an ancient ruin was carbon dated and found to be approximately 23,000 years old. The wood now contains 8.5 grams of carbon-14. caculate how many grams of carbon-14 this piece of wood contained when the tree died. Please show your work. ( The half-life of carbon-14 is 5730. is

This sounds awfully like a homework question

This was posted by Buffy Buffy on
- Wednesday, January 20, 1999 at 20:04:04 (EST)

Question number 57
An answer to me's question
what is orbital notation? is

Orbital notation refers to energy levels that the electrons in a given atom occupy. For example, Hydrogen's orbital notation is 1s^1 . Calcium's is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

This was posted by Steven Stoker on
- Wednesday, January 20, 1999 at 20:02:03 (EST)

Question number 58
An answer to kelly sullivan's question
which elements are the metalloids on the periodic table of the elements is

The metalloids are the elements along the "staircase" on the right of the p eriodic table. It is here where the metals and nonmetals meet. The specific elements are Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, and Astatine.

This was posted by Steven Stoker on
- Wednesday, January 20, 1999 at 19:58:11 (EST)

Question number 53
An answer to ali baba's question
y-a-t-il eu des etudes sur les monophosphates indiquer les references. ainsi sur les fullerenes. is

English please. Anglais.

This was posted on - Friday, January 08, 1999 at 21:34:53 (EST)

Question number 54
An answer to Priscilla's question
Can any one answer this question apiece of wood from an ancient ruin was carbon dated and found to be approximately 23,000 years old. The wood now contains 8.5 grams of carbon-14. caculate how many grams of carbon-14 this piece of wood contained when the tree died. Please show your work. ( The half-life of carbon-14 is 5730. is

The least you could do is leave out the (please show your work.) part. Once again, no homework.

This was posted on - Friday, January 08, 1999 at 21:34:20 (EST)

Question number 55
An answer to Priscilla 's question
Explain how nuclear reactions change the composition of an atoms nucleus. is

Please no homework questions.

This was posted on - Friday, January 08, 1999 at 21:33:45 (EST)

Question number 48
An answer to Jarumic@hotmail.com's question
My question concerns the many fields of Chemistry, mainly basic equations in the art which many call chemistry. I am baffled on how to transform regular molecules into moles. How do I do this. is

Let's take for example H2O, water. 3 H2O would indicate that there are three moles of H2O, three moles of hydrogen, and six moles of oxygen. In addition, you have 3 moles of wate r.

This was posted on - Wednesday, January 06, 1999 at 16:30:15 (EST)

Question number 49
An answer to Rochelle's question
What is the percentage of glycolic acid in pure sugar cane? And...does this percentage decrease when the sugar is combined with water? is

I am not sure as to your first question, but i'm sure that you can look it up in a book somewhere. As to you second question, sure, the percentage of gl ycolic acid would decrease compared to the amount that it is combined with.

This was posted on - Wednesday, January 06, 1999 at 16:27:56 (EST)

Question number 50
An answer to Rachel's question
Ethene is converted to ethane by the reaction C2H4+H2->C2H6 (numbers are all subscripts) C2H4 flows into a catalytic reactor at 25.0 atm and 573 K with a flow rathe of 1000. L/min. hydrogen at 25.0 atm and 573 K flows into the reactor at a flow rate of 1500. L/min. If 15.0 kg of C2H6 are collected per minute, what is the percent yield of t he reaction? is

i'm sorry, but we can't do your homework for you.

This was posted on - Wednesday, January 06, 1999 at 16:26:00 (EST)

Question number 49
An answer to Rochelle's question
What is the percentage of glycolic acid in pure sugar cane? And...does this percentage decrease when the sugar is combined with water? is

iodine

This was posted on - Saturday, January 02, 1999 at 09:24:28 (EST)

Question number 44
An answer to John's question
The name wasn is

Lets see now.

This was posted on - Thursday, December 10, 1998 at 16:07:55 (EST)

Question number 41
An answer to 's question
What is the technique in solving chemical equations in a short period of time? is

Like most things, solving chemical equations takes some practice. The general concept for solving chemical equations is to deal with the larger molecules first followed by the smaller molecules. For examp le, if a hydrocarbon is reacted with oxygen, you should balance the smaller molecules based upon the atoms that are reacted from the hydrocarbon.

This was posted on - Sunday, November 15, 1998 at 20:30:28 (EST)

An answer to 's question
What advice do you have for my students this year who are about to embark upon the study of net ionic equations? is

Study Solubility Table

This was posted on - Saturday, October 10, 1998 at 16:41:06 (EDT)

Question number 39
An answer to 's question
What advice do you have for my students this year who are about to embark upon the study of net ionic equations? is

When studying net ionic equations, just remember that you are only concerned with the ions that are involved with the formation of the precipitate(s). One way to check yourself is to write out all of the reactants and products(any ions and solids), then to cancel what appears on both sides of the balanced ionic equation. The equation should now contain only the ions involved in the formation of the solid. And always remember Solubility Rules, Dude!

This was posted on - Wednesday, September 30, 1998 at 22:35:49 (EDT)