The production of NO₂ from nitrogen and oxygen, N₂ + 2 O₂ → 2 NO₂, was studied in an experiment, and the rate of nitrogen consumption was measured as 2.5 × 10 ^{- 5} mol L^-1 s^-1. What was the rate of NO₂ production in this experiment?

Strategy Use the stoichiometry of the reaction to relate the respective rate expressions. Because the rate of the reaction is the same whichever quantity is measured, we can set the expressions for the rate of nitrogen dioxide appearing and nitrogen disappearing equal to each other and solve for the unknown quantity.