At relatively high temperatures nitrogen and oxygen more readily form a compound according to: N2(g) + O2 <-> 2NO(g). Calculate kp given that the initial pressures of nitrogen are 95 atm and 80 atm, respectively, and the equilibrium pressure of nitrogen oxide is 6.0 atm. I know the answer is 5.1x10^-3. I am trying to find how is that number possible.