Can someone please help me set up these problems?

Can someone please help me set up these problems? No need to answer them for me, just having trouble setting them up:Calculate the pressure of O2 (in atm) over a sample of NiO at 25 degrees Celcius if the delta G standard = 212 kJ/mol for the reaction: NiO(s)<-->Ni(s)+(1/2)O2(g)The equilibrium constant Kp for the reaction CO(g)+Cl2(g) <--> COCl2(g) is 5.62x10^35 at 25 degrees Celcius. Calculate delta G of formation for COCl2 at 25 degrees Celcius.The answers I'm getting seem really, really off ( like 4.73x10^-75 atm for the first one?!)Thank you to anyone who can help.