A reaction gave off 48 cm3 of gas in 30 s. What was the mean rate of this reaction?
0.63 cm3/s0.63\ \text{cm}^3\text{/s}0.63 cm3/s
1.6 cm3/s1.6\ \text{cm}^3\text{/s}1.6 cm3/s
16 cm3/s16\ \text{cm}^3\text{/s}16 cm3/s
78 cm3/s78\ \text{cm}^3\text{/s}78 cm3/s
41 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.