Neco 2020 Chemistry Question 46
Practice objective / multiple choice question 46 from the 2020 Neco Chemistry examination.
A step‑growth polymerisation of a diacid and a diamine forms a nylon polymer whose repeat unit has a molar mass of 226 g mol\(^{-1}\). Initially 0.10 mol of each monomer are present and the reaction proceeds to 95 % conversion. (i) Calculate the number‑average degree of polymerisation, \(DP_n\). (ii) If 2 % of the repeat units become cross‑linked and therefore do not contribute to chain length, determine the number‑average molecular weight of the polymer after cross‑linking. Give your answer in g mol\(^{-1}\) to the nearest whole number.
Answer Options
About This Question
This is Neco 2020 Chemistry Question 46. It is one of the objective questions from the 2020 Neco Chemistry examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.