For which of the reactions would a change in pressure not shift the equilibrium concentration?
A) N2(g) + O2(g)←→2NO(g) Kp = 0.050
B) 2NO(g) + Cl2(g) ←→2NOCl(g) Kc = 4.6 x 104
C) 2SO3(g)←→2SO2(g) + O2(g) Kp = 16.5
D) 2SO3(g)←→2SO2(g) +O2(g) Kc = 0.230
Answer A