2-1 The reaction O22O has Kp(2800K)=2.9067103atm.(1) (a) If one starts with pure O2, calculate the equilibrium mole fractions of O and O2 at 2800K at total pressures p=0.1,1,10, and 100atm. (b) If one starts with a gas mixture of 90%Ar and 10%O2 (by mole) at low temperature, calculate the equilibrium mole fractions of O and O2 at 2800K and p=1 and 100 atm. How do the ratios XO/XO2 in this case compare to the corresponding ratios obtained in part (a)? (Ar is inert and does not react as the temperature changes.)