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3.3 Yield and atom economy of chemical reactions

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Question 14

A student heats zinc and sulfur together to make zinc sulfide.

Zn+S→ZnS\mathrm{Zn + S \rightarrow ZnS}Zn+S→ZnS

Relative atomic masses (ArA_rAr​): S = 32, Zn = 65

The student uses 6.50 g of zinc and 4.80 g of sulfur.

The student collects 8.25 g of zinc sulfide.

Calculate the percentage yield of zinc sulfide.

[5]
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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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