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3.3 Yield and atom economy of chemical reactions

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Question 32

MgCO3→MgO+CO2\mathrm{MgCO_3 \rightarrow MgO + CO_2}MgCO3​→MgO+CO2​

Relative formula masses (MrM_rMr​): MgCO3\mathrm{MgCO_3}MgCO3​ = 84.0 and CO2\mathrm{CO_2}CO2​ = 44.0

A student heated 42.0 g of magnesium carbonate and collected the carbon dioxide produced. The percentage yield of carbon dioxide was 80.0 %.

What mass of carbon dioxide did the student collect?

[1]
A

22.0 g

B

4.4 g

C

27.5 g

D

17.6 g

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

104 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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