# chemistry

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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!

• chemistry -

keq= x/(.5)^2

x= .25*5=1.25moles/liter

• chemistry -

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

• chemistry -

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

• chemistry -

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

• chemistry -

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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