A polymer sample contains 3 molecules of molar mass 10^3 ,3 molecules of molar mass 500 and 4 molecules of molar mass 200 . What is its weight average molecular mass?

Question

Accepted Answer

Correct answer: B. (b) M_w= n_iM_i^2 n_iM_i= (3 (10^3 )^2)+(3 (500 )^2)+(4 (200 )^2)(3 10^3)+ (3 500 )+ (4 200 )=737.7 .

$A polymer sample contains 3 molecules of molar mass 10^{3}, 3 molecules of molar mass 500 and 4 molecules of molar mass 200 . What is its weight average molecular mass?$

Solution

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