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A sample of polymer contains 30% molecul...

A sample of polymer contains 30% molecules with molecular mass 20,000, 40% with molecular mass 30,000 and 30% with 60,000. What is the number average molecular mass of the polymer?

A

36000

B

48000

C

50000

D

25000

Text Solution

Verified by Experts

The correct Answer is:
A
`barM_n=((30xx20,000)+(40xx30,000)+(30xx60,000))/(30+40+30)`
=36,000
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