[laxplayer]

The problem states:
Methanol, CH3OH, is produced commercially by the catalyzed reaction of carbon monoxide and hydrogen: CO(g) + 2 H2(g)  CH3OH(g). An equilibrium mixture in a 2.00 L vessel is found to contain 0.0406 mol CH3OH, 0.170 mol CO and 0.302 mol H2 at 500. K. Calculate Kc at this temperature.

I have no idea how to go from moles to the partial pressure, but once i have that I can find out Kc.

[Astrokel]

Hey laxplayer,

  why do you need partial pressure? They are not asking for Kp. You have the amounts and volume, you can find the concentration at equilibrium and use Kc formula.

Kelvin 

[laxplayer]

oooh, got it
thanks =]