Asked by samantha

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]?

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

I do not understand if the Kc is 100c or where that plays in!
Answered by bobpursley
keq= x/(.5)^2

x= .25*5=1.25moles/liter
Answered by samantha
Thank you!
Can you explain to me where the 0.25 comes from?
Answered by DrBob222
Did you look at the answer? What is (.5)<sup>2</sup>?
Answered by samantha
Sorry I had a moment! I didn't process before I typed!
Answered by DrBob222
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.:-).
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