A 100 G Sample of Solid NH₄Cl Is Heated in a a 5.00

A 10.0 g sample of solid NH₄Cl is heated in a 5.00 L container to 900 °C. At equilibrium, the pressure of NH₃(g) is 1.17 atm. Calculate the equilibrium constant, Kp, for the reaction below. NH₄Cl(s) $\rightleftharpoons$ NH₃(g) + HCl(g)

A) 1.37
B) 4.93
C) 1.17
D) 2.34
E) None of these