Which of the following expressions is the correct equilibrium-constant expression for the equilibrium shown? 2 A (g) --> B(g) *arrow goes both ways*

Question

A. [A][B]

B. [B]/[A]

C. [B]/[A]^2

D. [B]^2/[A]

E. [B]^2[A]

Answer 1

C. [B]/[A]^2