For the Reaction
NH₃(g)+ H₂S(g) $f$ NH₄HS(s)
K_c = 9

For the reaction
NH₃(g) + H₂S(g) $f$
NH₄HS(s)
K_c = 9.7 at 900 K.
If the initial concentrations of NH₃(g) And H₂S(g) Are 2.0 M,What is the equilibrium concentration of NH₃(g) ?

A) 1.9 M
B) 1.7 M
C) 0.20 M
D) 0.10 M
E) 0.32 M