At 491K, Kc = 1.2 x 10-4 for the equilibrium  NH4SH(s) ⇌ NH3(g) + H2S(g)  a) Calculate the equilibrium concentrations of NH3 and H2S is a solid sample of NH4SH is placed in a closed vessel at 491K and decomposes until equilibrium is reached. b) What is the minimum mass of NH4SH(s) that must be added to a 2.00L container to be able to reach equilibrium at 491K?

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