A container is filled with 0.8 M SiO2, 1.5 M HCl, 0.4 M SiCl4 and 0.9 M H2O and heated to 700oC where it reacts until equilibrium is reached: SiO2 (g) + 4HCl (g) ⇌ SiCl4 (g) + 2H2O (g) At equilibrium, it is determined that the concentration of H2O (g) is 1.3 M. Calculate the value of the equilibrium constant Kc for the reaction at this temperature.