The equilibrium constant, Kc, for the following reaction is 1.80E-2 at 698 K. 2 HI(g) H2(g) + I2(g) Calculate the equilibrium concentrations of reactant and products when 0.261 moles of HI are introduced into a 1.00 L vessel at 698 K. [HI] = M [H2] = M [I2] = M