Neco Model Questions Vol1 2025 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2025 Neco Model Questions Vol1 Chemistry examination.
A polymer is prepared by free‑radical copolymerisation of monomer A (\(C_{3}H_{4}O_{2}\), molar mass 72 g mol\(^{-1}\)) and monomer B (\(C_{2}H_{4}\), molar mass 28 g mol\(^{-1}\)). Elemental analysis of the polymer gives mass percentages: carbon 61.6 %, hydrogen 8.4 % and oxygen 30.0 %. Assuming the polymer contains only units of A and B, calculate the mole fraction of monomer A in the polymer (to two decimal places).
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This is Neco Model Questions Vol1 2025 Chemistry Question 33. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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