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The mass average molecular mass & number average molecular mass of a polymer are 40,000 and 30,000 respectively. The polydispersity index of polymer will be

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Solution :AVERAGE number MOLECULES weight `BAR(M)_(N) =30,000`
Average mass molecular weight `bar(M)_(w)=40,000`
polydispersity index (PDI) `= (bar(M)_(w))/(bar(M)_(n))=40,000/30,000=1.33`


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