Given the reaction: 2H2 (g) + 2NO (g) ⇌ 2H2O (g) + N2 (g)
A 100 mL reaction vessel initially contains 0.300 M of NO and 0.200 moles of H2. At equilibrium, the concentration of NO in the vessel is 0.060 M, and N2, H2O, and H2 were all present at equilibrium also. What is the equilibrium constant, Kc, of the reaction?