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2.6 Calculations involving masses

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Question 23
F

An iron ore contains 80.0% iron(III) oxide by mass. In a blast furnace the iron(III) oxide is reduced.

Fe2O3+3CO→2Fe+3CO2\mathrm{Fe_{2}O_{3} + 3CO \rightarrow 2Fe + 3CO_{2}}Fe2​O3​+3CO→2Fe+3CO2​

Relative atomic masses: O=16\mathrm{O} = 16O=16, Fe=56\mathrm{Fe} = 56Fe=56.

What is the maximum mass of iron that can be obtained from 5.00 tonnes of the ore?

[1]
A

1.40 tonnes

B

2.80 tonnes

C

3.50 tonnes

D

5.71 tonnes

Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

55 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

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