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

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Question 20

Carbon monoxide reacts with oxygen according to this equation:

2CO+O2→2CO22\text{CO} + \text{O}_2 \rightarrow 2\text{CO}_22CO+O2​→2CO2​

A reaction mixture contains 21 g of carbon monoxide and 16 g of oxygen. The relative formula masses are CO=28\text{CO} = 28CO=28, O2=32\text{O}_2 = 32O2​=32 and CO2=44\text{CO}_2 = 44CO2​=44.

a.

Explain which reactant is limiting.

[2]
b.

Calculate the maximum mass of carbon dioxide that can be produced.

[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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