In an experiment to study the formation of HI(g),H₂(g) + I₂(g) ⇄ 2HI(g) H₂(g) and I₂(g) were placed in a sealed container at a certain temperature. At equilibrium, [H₂] = 6.50x10⁻⁵ M, [I₂] = 1.06x10⁻³ M, and [HI] = 1.87x10⁻³ M. Calculate Kc for the reaction at this temperature.