A student investigated the rate of reaction for the catalytic decomposition of hydrogen peroxide. The table below shows the volume of oxygen gas collected after 90 seconds in four repeat tests:
| Test | Volume of gas collected in cm3\text{cm}^3cm3 |
|---|---|
| Test 1 | 92 |
| Test 2 | 97 |
| Test 3 | 91 |
| Test 4 | 48 |
Calculate the mean volume of gas collected at 90 seconds.
Do not include the anomalous result in your calculation.
Give your answer to 2 significant figures.
26 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1 Calculating rates of reactions, 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.