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3.3 Yield and atom economy of chemical reactions

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Question 7
F

Calcium oxide is made by heating calcium carbonate.

CaCO3→CaO+CO2\mathrm{CaCO_3 \rightarrow CaO + CO_2}CaCO3​→CaO+CO2​

Relative formula masses (MrM_rMr​): CaCO3\mathrm{CaCO_3}CaCO3​ = 100, CaO\mathrm{CaO}CaO = 56, CO2\mathrm{CO_2}CO2​ = 44

What is the percentage atom economy for making calcium oxide?

[1]
A

44.0 %

B

56.0 %

C

78.6 %

D

100 %

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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