At night, an equilibrium reaction between two different nitrogen compounds generates N2O5 in the atmosphere, as represented below.
Reaction 1: NO3(g) + NO2(g) ⇄ N2O5(g) K = 2.6×10−11

A mixture of NO3 and a ten-fold excess of NO2 are placed inside a rigid container at constant temperature and allowed to reach equilibrium. Which of the following provides a correct comparison of the equilibrium concentrations of these chemical species, and why?

a. [N2O5] << [NO3] because a small K value indicates that the consumption of the reactants is favored at equilibrium.
b. [NO2] << [N2O5] because a small K value indicates that the consumption of the reactants is favored at equilibrium.
c. [NO2] << [NO3] because a small K value indicates that the formation of the products is not favored at equilibrium.
d. [N2O5] << [NO2] because a small K value indicates that the formation of the products is not favored at equilibrium.