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Calculate the polydispersity index of a polymer than consisting of following molecular weights of chains and chain numbers: M , Da N 800000 6 500000

Calculate the polydispersity index of a polymer than consisting of following molecular weights of chains and chain numbers:

M, Da	N
800000	6
500000	4
150000	2
90000	2

1.8

1.5

1.3

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