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5.1 Monitoring chemical reactions

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Question 10
F

Hydrogen can be made by reacting methane with steam.

CH4+2H2O→CO2+4H2 \mathrm{CH_{4} + 2H_{2}O \rightarrow CO_{2} + 4H_{2}} CH4​+2H2​O→CO2​+4H2​

Hydrogen is the desired product.

Relative atomic mass (ArA_rAr​): H = 1.0 C = 12.0 O = 16.0

What is the atom economy for making hydrogen?

[1]
A

3.8%

B

4.3%

C

15.4%

D

18.2%

Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

57 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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