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2.1 Chemical bonds, ionic, covalent and metallic

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Question 17

Two polymer molecules are represented as follows:

  • Molecule A: [ ⁣−CH2−CH2− ⁣]n\left[\!-\text{CH}_2-\text{CH}_2-\!\right]_n[−CH2​−CH2​−]n​
  • Molecule B: [ ⁣−CH2−CH2− ⁣]n\left[\!-\text{CH}_2-\text{CH}_2-\!\right]_n[−CH2​−CH2​−]n​

A student claims that the two molecules must contain the same number of repeating units because both representations use nnn.

Explain whether the representations support the student's claim.

[2]
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2.1 Chemical bonds, ionic, covalent and metallic Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Chemical bonds, ionic, covalent and metallic

98 exam-style questions on AQA GCSE Chemistry 2.1 Chemical bonds, ionic, covalent and metallic, covering 2.1.1 Chemical bonds, 2.1.2 Ionic bonding, 2.1.3 Ionic compounds, 2.1.4 Covalent bonding, and 2.1.5 Metallic bonding. Each one has a worked solution and a mark scheme showing where the marks go.

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