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6.2 Organic chemistry

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Question 11

A computer simulation tracks molecules of a single alkane. Alkanes have the general formula CnH2n+2\mathrm{C_nH_{2n+2}}Cn​H2n+2​.

The table shows the data recorded by the simulation.

Number of alkane moleculesTotal number of carbon atoms
32352

How many hydrogen atoms are present in all the alkane molecules?

Show your working.

[3]
Markscheme

6.2 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Organic chemistry

131 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.

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