The equilibrium constant, K., for the following reaction is 1.80×10² at 698 K. 2HI(g)=H2(g) + I½(g) Calculate the equilibrium concentrations of reactant and products when 0.256 moles of HI are introduced into a 1.00 L vessel at 698 K. (HI] M [H2] M [12] M

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