An equilibrium mixture of SO2, O2, and SO3 at a high temperature contains the gases at the following concentrations: [SO2] = 3.77 x 10^-3 mol/L, [O2] = 4.30 x 10^-3 mol/L, and [SO3] = 4.13 x 10^-3 mol/L.
Calculate the equilibrium constant, Kc for the reaction
2 SO2 (g) + O2 (g)------2 SO3 (g)