The decomposition of nitrogen dioxide 2 NO2 → 2 NO + O2 occurs in a two-step sequence at elevated temperatures. The first step is NO2 → NO + O. Which of the following accurately predicts the second step that, when combined with the first step, gives the complete reaction?

MCQS on the chemical principles and theories that are used in a variety of practical applications. Topics include chemical kinetics, solution chemistry, chemical equilibrium, acids, bases, and buffers, electrochemistry, nuclear chemistry, and an introduction to organic chemistry.