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Question

How can we calculate the average molecular mass?


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Solution

Average molecular mass:-

  • Average molecular mass is usually calculated for polymers or large macromolecules.
  • The average molecular weight(mass) is the sum of the weight of all molecules divided by the total number of molecules that are present in that particular sample.
  • With the help of the molar composition and the molar weight, the average molecular mass can be computed.
  • The average molecular mass is given by:

Averagemolecularmass=n1m1+n2m2+n3m3+n4m4+....n1+n2+n3+n4+....

  • Here n=number of molecules, m=molecular mass of the molecules.

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