The Equilibrium Constant (K_p) for the Reaction Below Is 7

The equilibrium constant (K_p) for the reaction below is 7.00 × 10^{- 2} at 22 °C: A sample of NH₄HS is placed in an evacuated container and allowed to come to equilibrium. The partial pressure of NH₃ is then increased by the addition of 0.590 atm of NH₃. The partial pressure of H₂S at equilibrium is now atm.

A) 0.691
B) 0.855
C) 0.119
D) 0.265
E) 0.101