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Question bank·3.2 Use of amount of substance in relation to masses of pure substances

3.2 Use of amount of substance in relation to masses of pure substances

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Question 13

A sample of gas contains 4.4 g of carbon dioxide, $CO2\text{CO}_2$ , and 1.8 g of water vapour, $H2O\text{H}_2\text{O}$ . The relative formula masses ( $M_r$ ) are 44 for carbon dioxide and 18 for water. The Avogadro constant is 6.02 × 10²³ per mole.

Calculate the total number of atoms in the sample.

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Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

GCSE
Chemistry
3.2 Use of amount of substance in relation to masses of pure substances

131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.