During a reaction between calcium carbonate and dilute hydrochloric acid at 30 ∘C30\text{ }^{\circ}\text{C}30 ∘C, 18.0 cm3 of carbon dioxide gas was collected in the first 45 seconds45\text{ seconds}45 seconds.
Calculate the average rate of reaction, in cm3 s−1\text{cm}^3\text{ s}^{-1}cm3 s−1, for this time period.
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.