Chapter 15, Problem 94E

The reaction ${\text{2H}}_{\text{2}}{\text{O}}_{\text{2}}\left(\text{aq}\right)\to {\text{2H}}_{\text{2}}\text{O}\left(\text{l}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)$ is first order in H₂O₂ and under certain conditions has a rate constant of 0.00752 s-¹at 20.0°C. A reaction vessel initially contains 150.0 mL of 30.0% H₂O₂ by mass solution (the density of the solution is 1.11 g/mL). The gaseous oxygen is collected over water at 20.0°C as it forms. What volume of O₂ forms in 85.0 seconds at a barometric pressure of 742.5 mmHg? (The vapor pressure of water at this temperature is 17.5 mmHg.)