Predict how the following actions will shift the reaction equilibrium:

a. 2 KClO3 (s) 2 KCl(s) + 3 O2(g); P

b. 2 PbO(s) + O2(g) 2 PbO2(s); [PbO]

c. 2H2(g) + O2(g) 2H2O(g) (exothermic); T