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

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Question 6

Aluminium oxide is made by reacting aluminium with oxygen.

4Al+3O2→2Al2O34\text{Al} + 3\text{O}_2 \rightarrow 2\text{Al}_2\text{O}_34Al+3O2​→2Al2​O3​

Relative atomic masses (ArA_rAr​): Al=27\text{Al} = 27Al=27, O=16\text{O} = 16O=16

a.

A batch uses 10.8 g of aluminium. Calculate the mass of oxygen needed to use up all the aluminium.

[3]
b.

Calculate the maximum mass of aluminium oxide formed in this batch.

[2]
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3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /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.

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