Subject: Physical Chemistry · Chapter: Polymer Chemistry · Topic: Molecular Weight Averages · Exam: NET DEC 2019 · Marks: 2 · Difficulty: Medium
A sample of polysterene is composed of three weight fractions: $0.20,0.50$ and 0.30 . The molecular weight of these fractions are $10,000,40,000$ and 60,000 , respectively. The weight average molecular weight of this sample is