Chapter 14, Problem 21PS

At 573 K, gaseous NO₂(g) decomposes, forming NO(g) and O₂(g). If a vessel containing NO₂(g) has an initial concentration of 1.9 × 10⁻² mol/L, how long will it take for 75% of the NO₂(g) to decompose? The decomposition of NO₂(g) is second-order in the reactant and the rate constant for this reaction, at 573 K, is 1.1 L/mol · s.