1. A quantity of 0.20 mol of carbon dioxide was heated to a certain temperature with an excess of graphite in a closed container until the following equilibrium was reached:
C (s) + CO2 (g) <--> 2CO (g)
Under these conditions, the average molar mass of the gas was 35 g/mol.
(a) calculate the mole fractions of CO and CO2.
(b) what is the value of equilibrium constant Kp if the total pressure is 11 atm?