Quantitative chemistry and the mole

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Apply the law of conservation of mass and explain apparent mass changes in reactions that take in or release gases
Calculate relative formula mass (Mr) and the percentage by mass of an element in a compound
(HT) Use the mole: calculate amounts from mass and Mr, use the Avogadro constant (6.02 × 10²³ per mole), balance equations from reacting masses and identify limiting reactants

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(Edexcel, OCR, Cambridge, WJEC) Determine empirical formulae from experimental data; (Cambridge Extended, WJEC) use molar gas volume and percentage yield

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