Chemistry

Problem

The following equilibrium is established at a certain temperature:

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

Which of the following gives the correct expression for the reaction quotient

Q_c

at that instant? a)

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

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

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

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