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3.3 Yield and atom economy of chemical reactions

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Question 31

In an electrolytic cell, 27.0 g of water is completely decomposed.

2H2O→2H2+O2\mathrm{2H_2O \rightarrow 2H_2 + O_2}2H2​O→2H2​+O2​

Relative atomic masses (ArA_rAr​): H = 1, O = 16

What is the maximum theoretical mass of hydrogen produced?

[1]
A

6.0 g6.0\ \text{g}6.0 g

B

24.0 g24.0\ \text{g}24.0 g

C

1.5 g1.5\ \text{g}1.5 g

D

3.0 g3.0\ \text{g}3.0 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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