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

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Question 63

A gas cylinder contains oxygen, O2\text{O}_2O2​.

QuantityValue
Mass of oxygen48 g
Relative atomic mass (ArA_rAr​) of oxygen16

Calculate the number of moles of oxygen molecules, O2\text{O}_2O2​, in the gas cylinder.

[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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