1. The problem statement, all variables and given/known data When two moles of CO are introduced into a vessel containing solid sulfur, the final equilibrium pressure is 1.03 atm. Determine Kp for the reaction: S(s) + 2CO(g) <--> SO2(g) + 2C(s) 2. Relevant equations Kp=P(products)/P(reactants) Mole Fraction = mole of A/ total moles 3. The attempt at a solution I know Kp=P(products)/P(reactants) So I have Kp=[SO2]/[CO2]^2, I left the S and the C out because they are solids. I am not sure what to do with the final equilibrium pressure.