Homework Help: Chemistry

Posted by Anna on Sunday, February 10, 2013 at 2:33pm.

Find the initial concentration of NO2 if the concentration after 2.00 min is 0.113. k = 0.331 1/(M * s)
2 NO2 (g) + N2 (g) --> 2 N2O (g) + O2 (g)

Chemistry - DrBob222, Sunday, February 10, 2013 at 3:53pm
This is a second order reaction.
(1/A) - (1/Ao) = akt
Plug in 0.113 for A, 0.331 for k, 2 for a,and 2 for t then solv for Ao.
Chemistry - Anna, Sunday, February 10, 2013 at 9:05pm
True, however, I keep getting a negative value which is not possible.
Chemistry - DrBob222, Sunday, February 10, 2013 at 10:12pm
What is the unit for 0.113? Check the numbers in the post to make sure all are ok.
Chemistry - Anna, Sunday, February 10, 2013 at 11:26pm
its concentration, so it should be mol/L
Chemistry - Anna, Monday, February 11, 2013 at 1:17am
its concentration, so it should be mol/L

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