For each equilibrium below, describe the situation at equilibrium. Is it mostly products, mostly reactants or are both reactants and products present in reasonable amounts (not necessarily equal) at equilibrium? For full credit, give a brief explanation.
a. 2 SO3(g) ? 2 SO2(g) +O2(g)
Kc = 1.6 x 10- 10
b. PCl5(g) ? PCl3(g) + Cl2(g)
Kc = 0.030
c. ClNO2(g) + NO(g) ? NO2(g) + ClNO(g)
Kc = 1.3 x 104