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

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

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Question 28

In a blast furnace, iron(III) oxide (Fe2O3\text{Fe}_2\text{O}_3Fe2​O3​) is reduced to iron by reacting with carbon monoxide gas according to the equation:

Fe2O3+3CO→2Fe+3CO2 \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2 Fe2​O3​+3CO→2Fe+3CO2​

Calculate the volume of carbon monoxide gas, in dm3\text{dm}^3dm3, needed to react completely with 320 kg320\text{ kg}320 kg of iron(III) oxide.

(Relative atomic masses (ArA_rAr​): O=16\text{O} = 16O=16, Fe=56\text{Fe} = 56Fe=56; the volume of one mole of gas is 24 dm324\text{ dm}^324 dm3.)

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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

38 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 (HT only), 3.2.2 Amounts of substances in equations (HT only), 3.2.3 Using moles to balance equations (HT only), 3.2.4 Limiting reactants (HT only), and 3.2.5 Concentration of solutions. Each one has a worked solution and a mark scheme showing where the marks go.

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