2.6 Calculations involving masses

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Question 15

A student wants to find the empirical formula of the compound produced when magnesium ribbon is heated in air.

Element	Mg	O
Relative atomic mass, $A_r$	24	16

Describe a practical method that would provide suitable mass measurements. Explain how these measurements can be processed to obtain the empirical formula of the compound.

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Markscheme

2.6 Calculations involving masses Questions

GCSE
Chemistry
2.6 Calculations involving masses

142 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank·2.6 Calculations involving masses