Homework Help: chemistry

Posted by confused on Wednesday, April 14, 2010 at 10:43pm.

Kc=5.85x10^-3 at 25 degrees C for the reaction
N2O4(g)<-->2NO2(g)
fifteen(15.0) grams of N2O4 is confined in a 5.00-L flask at 25 degrees C. Calculate(a) the number of moles of NO2 present at equilibrium and(b) the percentage of the original N2O4 that is dissociated.

chemistry - catherine, Wednesday, April 14, 2010 at 10:45pm
uhh if i new chemistry i will help but u should post the same question around 5:00 pm tommorow and name the subject ms.sue shes really helpfull and thats when she usally is on hope some1 helps u if not just post agian 2mmorow..:)
chemistry - DrBob222, Wednesday, April 14, 2010 at 10:46pm
Convert 15.0 g N2O4 to moles and that divided by 5.0 L to obtain molarity.

Set up an ICE chart, substitute into Kc expression and solve.
chemistry - confused, Wednesday, April 14, 2010 at 10:48pm
what does it mean when it says the percentage of the original N2O4 that is dissociated.
chemistry - catherine, Wednesday, April 14, 2010 at 10:48pm
oh drbob222 and srasomething???are really helpful 2 luckly u got a respawn:)
chemistry - DrBob222, Wednesday, April 14, 2010 at 10:51pm
When you finish and know the equilibrium concn of N2O4, then (amt N2O4 present in grams/15.0)*100 = ?? I think you will get the percent answer if you use (moles at equil/original moles)*100 = ??

Answer this Question

Related Questions

AP Chemistry - Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84...
CHEMISTRY HELP NEEDED A.S.A.P - Given: N2O4 (g) « 2NO2 (g) @ 25 degrees ...
CHEMISTRY HELP DESPERATELY NEEDDED!!! - Given: N2O4 (g) « 2NO2 (g) @ 25 ...
Chemistry - When heated, N2O4 dissociates as follows: N2O4 =2NO2 A flask ...
CHEMISTRY HELP STILL NEEDED PLEASE!!! - Given: N2O4 (g) « 2NO2 (g) @ 25 ...
chemistry - Can you please check if I came up with the right answer for this ...
college chem - N2O4 --->2NO2 a 1 liter flask is charged with .4 mols of ...
AP Chemistry - Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84...
Chemistry....Please help - Given the equilibrium constant values: 1.N2(g)+ 1/2O2...
Chemistry Class - Dinitrogentetraoxide partially decomposes according to the ...

For Further Reading

First Name:
School Subject:
Answer: