In a closed container at constant temperature, the concentrations of N2 and O2 in the reaction N2+O2⇌2NO have remained unchanged for an hour. Laboratory measurements show that the rate of formation of NO is 8.0×10−6mol L−1s−1, while the rate of its decomposition is 6.5×10−6mol L−1s−1. Explain whether the system is at equilibrium and justify your answer.