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Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction NH4HS(s)⇌NH3(g)+H2S(g) This reaction...

Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction NH4HS(s)⇌NH3(g)+H2S(g) This reaction has a Kp value of 0.120 at 25 ∘C.

An empty 5.00-L flask is charged with 0.400 g of pure H2S(g), at 25 ∘C.

Part A

What are the partial pressures of NH3 and H2S at equilibrium, that is, what are the values of PNH3 and PH2S, respectively?

Enter the partial pressure of ammonia followed by the partial pressure of hydrogen sulfide numerically in atmospheres separated by a comma.

Part B

What is the mole fraction, χ, of H2S in the gas mixture at equilibrium?

Express your answer numerically.

Part C

What is the minimum mass of NH4HS that must be added to the 5.00-L flask when charged with the 0.400 g of pure H2S(g), at 25 ∘C to achieve equilibrium?

Express your answer numerically in grams.

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