Waec Model Questions Vol1 2022 Chemistry Question 44
Practice objective / multiple choice question 44 from the 2022 Waec Model Questions Vol1 Chemistry examination.
A polyester is prepared by condensation of monomer A (C₂H₄O, M = 44 g mol⁻¹) and monomer B (C₆H₄O₂, M = 108 g mol⁻¹). Each condensation eliminates one molecule of water (M = 18 g mol⁻¹). Elemental analysis of the polymer gives mass percentages: C = 71.6 %, H = 4.5 %, O = 23.9 %.\n(a) Determine the empirical formula of the repeating unit.\n(b) Calculate its molar mass.\n(c) If the number‑average molecular weight of the polymer is 2.0×10⁵ g mol⁻¹, find the degree of polymerisation (DP).
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This is Waec Model Questions Vol1 2022 Chemistry Question 44. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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