Solid Ammonium Hydrogen Sulfide Is Introduced into a 2 $\circ$ C,
What Is the Minimum Mass of Ammonium Hydrogen Sulfide

Solid ammonium hydrogen sulfide is introduced into a 2.00-L flask, and the flask is sealed. If this solid decomposes according to the equation below
NH₄HS(s) ⇌ NH₃(g) + H₂S(g) , K_p = 0.108 at 25 ^$\circ$ C,
What is the minimum mass of ammonium hydrogen sulfide that must be present in the flask initially if equilibrium is to be established at 25 ^$\circ$ C

A) 0.917 g
B) 1.37 g
C) 2.74 g
D) 0.581 g
E) 0.452 g

Correct Answer:

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