An equimolar mixture of CO2, O2, and N2 enter a reactor operating at steady state. An equilibrium

Question:

An equimolar mixture of CO2, O2, and N2 enter a reactor operating at steady state. An equilibrium mixture of CO2, O2, N2, NO, and CO exits at 3500 K and 600 kPa. Determine the
(a) Molar amount of CO2 (in kmols) in the mixture and
(b) Heat transfer (q) to the surroundings per unit mass of CO2. Assume the surroundings to be 300 K and 100 kPa.