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Amount of substance

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Question 2
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Compound X is converted into compound Z by a two-stage synthesis via compound Y.

The yields for the individual steps are:

X→Y60% \text{X} \rightarrow \text{Y} \quad 60\% X→Y60% Y→Z40% \text{Y} \rightarrow \text{Z} \quad 40\% Y→Z40%

What is the overall yield of Z in this synthesis?

A

20%20\%20%

B

24%24\%24%

C

50%50\%50%

D

100%100\%100%

Markscheme

Amount of substance Questions

  1. A Level
  2. /Chemistry
  3. /Amount of substance

79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.

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