297. For reaction
NH4HS(t) = NH3 H2S
at a certain temperature, the equilibrium pressure of the decomposition reaction products of pure NH4HS is 500 mm. rt. Art. Determine the equilibrium constant Kp and the total pressure in the state of equilibrium if ammonia is introduced into a vessel with solid NH4HS at a pressure of 300 mm. rt. Art.

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