A sample of polyethene has an average molar mass of 28 000 g mol⁻¹. What is its average degree of polymerisation (C = 12, H = 1)?
Correct answer A. 1000
Explanation
The repeating unit −CH₂−CH₂− has a molar mass of 28 g mol⁻¹. Degree of polymerisation = 28 000 ÷ 28 = 1000.
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