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6.2 Organic chemistry

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Question 19

Tetrafluoroethene, CF2=CF2\mathrm{CF_2{=}CF_2}CF2​=CF2​, undergoes addition polymerisation to form PTFE.

A PTFE molecule has a relative formula mass of 228 000.

Relative atomic mass (ArA_rAr​): C = 12.0 F = 19.0

What is the number of tetrafluoroethene molecules that joined to form this PTFE molecule?

[1]
A

2280

B

1140

C

9500

D

3000

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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