A 1.0-L reaction vessel at 90°C contains 8.00 g of sulfur, hydrogen, and hydrogen sulfid...

A 1.0-L reaction vessel at 90°C contains 8.00 g of sulfur, hydrogen, and hydrogen sulfide gases with partial pressures of 6.0 atm and 0.40 atm, respectively, at equilibrium:

(a) Calculate K for the reaction at equilibrium.

(b) The mass of sulfur is increased to 10.0 grams. What are the partial pressures of H₂ and H₂S when equilibrium is reestablished?

(c) The pressure of H₂S is increased to 1.0 atm. What are the partial pressures of H₂ and H₂S when equilibrium is reestablished?