In an investigation into reaction kinetics, a student decomposed a sample of hydrogen peroxide in the presence of a manganese(IV) oxide catalyst. The reaction yielded 432 cm3 of oxygen gas in exactly 2 minutes2\text{ minutes}2 minutes and 15 seconds15\text{ seconds}15 seconds.
Calculate the average rate of reaction in cm3 s−1\text{cm}^3\text{ s}^{-1}cm3 s−1.
127 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.