The equilibrium constant, Kp, for the following reaction is 0.215 at 673 K. ? NH4I(s) NH3(g) + HI(g) If an equilibrium mixture of the three compounds in a 5.39 L container at 673 K contains 1.26 mol of NH4I(s) and 0.280 mol of NH3(g), the partial pressure of HI(g) is | atm.

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