Given the equation representing a system at equilibrium:Which statement describes the concentration of the two gases in this system?The concentration of N2O4(g) must be less than the concentration of NO2(g).The concentration of N2O4(g) must be greater than the concentration of NO2(g).The concentration of N2O4(g) and the concentration of NO2(g) must be equal. The concentration of N2O4(g) and the concentration of NO2(g) must be constant.

.The concentration of N2O4(g) and the concentration of NO2(g) must be constant.

Explanation:

N2O4(g)<> 2NO2(g)

At equilibrium, all the concentrations of species involved in the equilibrium expression remain constant. This is because, at equilibrium, the rate of forward reaction equals the rate of reverse reaction. The concentration of the system does not change with time. The relative concentration of each specie, remain steady at equilibrium.

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