Question: (1) Polystyrene (PS) with three grades A, B, and C have been found in the market with their molecular characteristics given in the table below.

(1) Polystyrene (PS) with three grades A, B, and C have

(1) Polystyrene (PS) with three grades A, B, and C have been found in the market with their molecular characteristics given in the table below. What are the number average molecular weight, the weight average molecular weight, and the polydispersity index of the polystyrene mixture composing of 13 kg of A, 25 kg of B, and 12 kg of C? (2) Polystyrene | Mn (kg/mol) Mw (kg/mol) A 15 20 B 50 60 180 200

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