Chemistry - May 2007

it is 100 questions and this is one of the only questions that i dont know how to do...it is weird b/c it is really easy usually but i dont know how to do it now...the question is:

calulate the work associated with the ompression of a gas from 121L to 80.L at a constant pressure of 11 atm

i dont want the answer...i just want to know how to do it

2007-05-13 15:28:13 · 1 answers · asked by angelcourtney4317 3

2007-05-13 14:13:52 · 6 answers · asked by Anonymous

Glycolic acid, which is a monoprotic acid, has a pKa of 3.9. A 25.0 mL solution of glycolic acid is titrated to the stoichiometric point with 35.8 mL of .020 M sodium hydroxide solution. What is the pH of the resulting solution at the stoichiometric point?

Please help!

2007-05-13 14:10:53 · 1 answers · asked by Anonymous

2007-05-13 14:07:48 · 2 answers · asked by ursportsguy 1

2007-05-13 14:05:33 · 3 answers · asked by ursportsguy 1

Radiometric dating is used to give absolute dates for various substances. What assumptions are necessary for this to be useful and reasonably accurate?

2007-05-13 13:59:57 · 3 answers · asked by Anonymous

I have a chemistry project due and am not sure how bleach works chemically.

2007-05-13 12:58:19 · 2 answers · asked by Anonymous

then slows down after 10 seconds.why?

2007-05-13 12:48:26 · 2 answers · asked by Anonymous

or glucose +oxygen to form water and carbon dioxide

2007-05-13 12:45:01 · 2 answers · asked by Anonymous

2007-05-13 12:42:47 · 1 answers · asked by Anonymous

How much heat will be absorbed or released if 12.5g glucose reacts with excess sugar?

2007-05-13 12:39:48 · 1 answers · asked by Azumi 2

Caculate for Change H reaction for the combusion of glucose (C6H12O6) using heat of formation. Is this reaction endothermic or exothermic?

2007-05-13 12:38:49 · 1 answers · asked by Azumi 2

someone please dumb down the meaning of saponification for me please. i cant quite get what its trying to tell me!! maybe an example will help.

2007-05-13 12:18:16 · 3 answers · asked by Anonymous

2H2 + O2 > 2H2O

2007-05-13 12:16:04 · 3 answers · asked by depreciation 1

2007-05-13 11:57:02 · 2 answers · asked by coolnubias 1

2007-05-13 11:40:16 · 2 answers · asked by Anonymous

How many grams of sodium hydrogen carbonate, NaHCO3, must be heated to produce 2.50 dm3 of carbon dioxide measured at 22.5 degrees celsius and 97.5 kPa? The other products are sodium carbonate and water.

2007-05-13 11:05:16 · 1 answers · asked by hacksigntom 2

Hydrogen burns to give water. If 200.0cm3 of H2 reacts with 150.0 cm3 of O2, what volume of water vapor is produced? How many cubic centimeters of gas remain unreacted and what gas remains? Assume that all volumes are measured at any given temperature above the normal boiling point of water.

2007-05-13 11:04:48 · 1 answers · asked by hacksigntom 2

** I HAVE THE ANSWER, I NEED AN EXPLANATION BECAUSE I DON'T UNDERSTAND HOW TO DO THIS PROBLEM. THANK YOU!

calculate the change in temperature when 47g of ammonium nitrate (NH4NO3) dissolve in 100g water.

NH4+(aq) + NO3-(aq) --> NH4NH3(s) deltaH = -21.1 KJ/mol

MM(NH4NO3)=80.05g/mol
MM(H2O)=18.016g/mol
C(water)=75.3 mol^-1K^-1

a. 30K
b. 0.03K
c. -134K
d. -1K
e. -30K

2007-05-13 10:52:24 · 1 answers · asked by Anonymous

What book would this information thuroughly explain about? what chem theory relates to this problem? what general group of experiaments does this belong to? This color change happened when I added a certain amount of bleach turning it yellow. I then added more bleach and it turned colorless. Then I added some H2SO4 to the colorless concoction and it turned into a different color. All I want to know is why?!?

2007-05-13 10:45:03 · 1 answers · asked by nc123135 1

This is an example of the problems we have to do:
The ionic substance T3U2 ionizes to form T2+ and U3- ions. The solubility of T3U2 is 3.77x10^-20 mol/L. What is the value of the solubility-product constant?
Can someone explain to me how to get the answer?
I understand Keq but not this.

2007-05-13 10:32:37 · 2 answers · asked by ♥ 1

I always get these to mixed up can some one explain it to me so i wont forget ? Can someone also explain the reactions to both ???

2007-05-13 10:29:47 · 7 answers · asked by Knightmare_knight 1

2007-05-13 10:13:55 · 3 answers · asked by Anonymous

2007-05-13 10:13:10 · 1 answers · asked by ♥ReKa♥ 2

And since aspartame becomes formaldehyde above 86 degree's am I formaldehyding myself by taking it since my saliva is 96 degrees?

2007-05-13 09:55:54 · 3 answers · asked by Giggly Giraffe 7

Hydrocyanic acid is a very weak acid.

a) Write an equilibrium expression for the ionization of 0.10 mol/L HCN(aq). Include the percent ionization at SATP.

b) Calculate [H+(aq)] and the pH of a 0.10 mol/L solution of HCN (aq) at SATP.

2007-05-13 09:25:58 · 1 answers · asked by Anonymous

humid air
oxygen
steel
beer
all are solutions

2007-05-13 09:25:04 · 1 answers · asked by divaem 1

if yes, then wouldnt you get scalded?
what temperature does water have to be to evaporate?(turn into steam)
has anyone ever been seriously scalded by a shower? >.<

2007-05-13 09:24:19 · 7 answers · asked by plasticbag 2

I want to know for an odd reason, I'm using a magnifying glass to burn a pencil and I got the idea to boil water, but I don't know if the glass will produce enough heat. Does wood burn at a higher temp than water boils

2007-05-13 07:21:18 · 1 answers · asked by Ryan B 2

Please I need help on finding a slogan for iron and the price of it.

2007-05-13 07:14:30 · 4 answers · asked by crazyfyde 3