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3.3 Yield and atom economy of chemical reactions

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Question 11
F

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

Fe2O3+3CO→2Fe+3CO2\mathrm{Fe_2O_3 + 3CO \rightarrow 2Fe + 3CO_2}Fe2​O3​+3CO→2Fe+3CO2​

Relative formula masses (MrM_rMr​): Fe2O3\mathrm{Fe_2O_3}Fe2​O3​ = 160, CO\mathrm{CO}CO = 28

Relative atomic mass (ArA_rAr​): Fe = 56

What is the percentage atom economy for making iron?

[1]
A

29.8 %

B

45.9 %

C

59.6 %

D

70.0 %

Markscheme

3.3 Yield and atom economy of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Yield and atom economy of chemical reactions

39 exam-style questions on AQA GCSE Chemistry 3.3 Yield and atom economy of chemical reactions, covering 3.3.1a Percentage yield, 3.3.1b Theoretical mass of a product, 3.3.2a Atom economy, and 3.3.2b Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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