[Cheistrynoob768]

Question 5: http://imgur.com/Wa4BkSk

My work: http://i.imgur.com/u4KNJWU.jpg

I have a) correct, but I'm stuck on part b... I thought I've done it correctly but I kept getting a wrong answer, the correct answer is [NO2] = 0.56 mol/L and [N2O4] = 0.38 mol/L

[Borek]

In b you don't start with 0.37, you add 0.37 of N₂O₄ to whatever was already present.