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7.1 Carbon compounds as fuels and feedstock

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Question 13

A sample contains a single hydrocarbon. The hydrocarbon is burned completely in excess oxygen.

Analysis shows that, for every molecule of the hydrocarbon burned, five molecules of carbon dioxide and six molecules of water are produced.

a.

Calculate the molecular formula of the hydrocarbon.

[2]
b.

Calculate the number of oxygen molecules needed for each molecule of the hydrocarbon to burn completely.

[2]
Markscheme

7.1 Carbon compounds as fuels and feedstock Questions

  1. GCSE
  2. /Chemistry
  3. /7.1 Carbon compounds as fuels and feedstock

91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.

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