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

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Question 10
H

Iron is extracted from iron(III) oxide in a blast furnace.

Fe2O3+3CO→2Fe+3CO2\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2Fe2​O3​+3CO→2Fe+3CO2​

Relative atomic masses (ArA_rAr​): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Fe=56\text{Fe} = 56Fe=56

a.

Calculate the relative formula mass (MrM_rMr​) of iron(III) oxide, Fe2O3\text{Fe}_2\text{O}_3Fe2​O3​.

[1]
b.

Calculate the mass of iron produced when 320 g of iron(III) oxide reacts completely.

[3]
Markscheme

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

40 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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