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Polyesters and polyamides

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Question 5

A polypeptide polymer is formed by the condensation polymerization of 500 molecules of 2-aminobutanoic acid, CH3CH2CH(NH2)COOH\text{CH}_3\text{CH}_2\text{CH}(\text{NH}_2)\text{COOH}CH3​CH2​CH(NH2​)COOH.

a.

Write the structural formula of one repeat unit of this polymer.

[1]
b.

Calculate the relative molecular mass, MrM_rMr​, of the resulting polymer.

Use the following relative atomic masses: H=1.0H = 1.0H=1.0, C=12.0C = 12.0C=12.0, N=14.0N = 14.0N=14.0, O=16.0O = 16.0O=16.0. Show your working.

[3]

Polyesters and polyamides Questions

  1. A Level
  2. /Chemistry
  3. /Polyesters and polyamides