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3.1 Introducing chemical reactions

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Question 8

Carbon monoxide is passed over 16.0 g of heated iron(III) oxide. Enough carbon monoxide is used for all the iron(III) oxide to react.

The equation for the reaction is:

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

Relative atomic masses (ArA_rAr​): C = 12.0, O = 16.0, Fe = 55.8

Use the equation to calculate the mass of carbon dioxide produced.

Give your answer to 3 significant figures.

Mass of carbon dioxide = .................... g\mathrm{g}g

[3]
Markscheme

3.1 Introducing chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Introducing chemical reactions

134 exam-style questions on OCR GCSE Chemistry 3.1 Introducing chemical reactions, covering 3.1.1 Writing formulae and balanced chemical equations, 3.1.2 Formulae of compounds from ions, and state symbols, 3.1.3 Conservation of mass and observed changes in mass, 3.1.4 Half equations and balanced ionic equations, 3.1.5 The mole and the Avogadro constant, and 3.1.6 Stoichiometry, limiting reactants and reacting masses. Each one has a worked solution and a mark scheme showing where the marks go.

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