[mcmarlin13]

Carbonated sodas are typically packaged under a CO2 pressure of 5 bar. Calculate the number of mols of CO2 dissolved (in the form of H2CO3) in a 2.00 L bottle of soda.

We are told that:
CO2 + H2O --> H2CO3
Keq = 0.036

I know pv=nRT, but the temperature is not given in this problem. Do I just assume room temperature...or is there some other way to do this problem that I'm missing?

[Borek]

Can you write expression for the equilibrium constant?

[CoCoCo]

Are you supposed to assume the temperature is constant or have you been taught STP?