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7.1 Carbon compounds as fuels and feedstock

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Question 2
H

The general formula for the homologous series of alkanes is CnH2n+2\text{C}_n\text{H}_{2n+2}Cn​H2n+2​.

a.

A molecule of an alkane contains 24 hydrogen atoms. Determine the number of carbon atoms in this molecule.

[1]
b.

A hydrocarbon has the molecular formula C8H16\text{C}_8\text{H}_{16}C8​H16​. Explain why this hydrocarbon is not an alkane.

[2]
c.

Crude oil contains a very large number of different compounds. Explain why so many different carbon compounds exist.

[2]
Markscheme

7.1 Carbon compounds as fuels and feedstock Questions

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

40 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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