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A polymer sample combines five different molecular - weight fractions of equal weight. The molecular weights of these fractions increase from 2 0 kDa to

A polymer sample combines five different molecular

-

weight fractions of equal weight. The

molecular weights of these fractions increase from

20

kDa to

100

kDa in increments of

20

.

Calculate the number average, weight average, and z

-

average molecular weights and dispersity of

this polymer sample

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