A chamber initially contains a gaseous mixture consisting of 4 kmol of CO2, 8 kmol of CO

Question:

A chamber initially contains a gaseous mixture consisting of 4 kmol of CO2, 8 kmol of CO and 2 kmol of H2. Assume an equilibrium mixture formed consists of CO2, CO, H2O, H2 and O2 at 2600 K and 100 kPa, determine the equilibrium composition of
(a) CO2,
(b) CO (in kmols).