Hydrogen gas in a gas syringe is connected to a gas-tight vessel containing unsaturated oil and nickel. The syringe reading decreases as the reaction proceeds. Which quantity does each syringe reading give directly?
The mass of hydrogen remaining
The mass of oil that has reacted
The volume of hydrogen remaining
The rate at which hydrogen is used up
122 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.