The K for the reaction: 12(e) + Brze) 2 Brig) is 1.2 x 102. If the concentrations of all species are as follows: 12(g) = 0.310 mol/L. Br2(g) - 0.310 mol/L and Br(g) = 2.00 mol/L, is the system at equilibrium? not explain what must happen for equilibrium to be achieved