CBSE Class 12-science Answered
In a polymer sample 30% of molecules have a molecular mass 20,000, 40% have 30,000 and the rest 60,000. What is the weight average molecular mass of the polymer? (1) 40,300, (2) 30,600, (3) 43,333, (4) 50,400
Asked by patra04011965 | 14 May, 2019, 07:55: AM
Expert Answer
The correct option is (3)
Given:
n1 = 30
n2 = 40
n3 = 30
M1 = 20000
M2 = 30000
M3 = 60000
We have,
Mass average molecular mass of the polymer is 43333.
Answered by Varsha | 14 May, 2019, 11:08: AM
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