The equilibrium constant for the following reaction is 5.0 at 100c. If an equilibrium mixture contains [No2]=0.50 M, what is the [N2O4]?

Question

2No2(g) <--> N2O4 (g)

I do not understand if the Kc is 100c or where that plays in!

bobpursley · Answer

keq= x/(.5)^2 x= .25*5=1.25moles/liter

samantha · Answer

Thank you! Can you explain to me where the 0.25 comes from?

DrBob222 · Answer

Did you look at the answer? What is (.5)²?

samantha · Answer

Sorry I had a moment! I didn't process before I typed!

DrBob222 · Answer

That's ok. I do that too. Yesterday I TRIED to balance my check book. The trouble is my brain kept telling me the number was wrong but the computer said the number was right. It took two hours for me to convince my brain that the computer really was right all along.:-).