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The equilibrium constant, Kc , for the following reaction is 7.00×10-5 at 673 K. NH4I(s) <-->NH3(g) + HI(g) If an equilibrium mixture of the three compounds in a 4.23 L container at 673 K contains 3.76 mol of NH4I(s) and 0.243 mol of NH3, the number of moles of HI present is?