Chemistry

Problem

For the reaction

2\text{NO}_2(g)\;\rightleftharpoons\;\text{N}_2\text{O}_4(g)

at a fixed temperature, which expression correctly represents the equilibrium constant

K_c

in terms of molar concentrations? a)

K_c = \dfrac{[\text{NO}_2]^2}{[\text{N}_2\text{O}_4]}

K_c = \dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]^2}

K_c = \dfrac{[\text{N}_2\text{O}_4]^2}{[\text{NO}_2]^2}

K_c = \dfrac{[\text{N}_2\text{O}_4]}{[\text{NO}_2]}