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6.2 Organic chemistry

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Question 22

A chemist makes one polyester chain from a mixture of monomer molecules.

The sum of the relative formula masses of the monomer molecules is 3600. The polyester chain has a relative formula mass of 3276. Water is the only other product formed.

Relative formula mass of water = 18

What is the number of ester links in the polyester chain?

[1]
A

182

B

200

C

324

D

18

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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