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