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MSE 430 Fall 2015 Problem Set Three mixtures were prepared from three monodispersed polystyrene samples (with molar masses of 10,000, 30,000, and...

MSE 430 Fall 2015 Problem Set

Three mixtures were prepared from three monodispersed polystyrene samples (with molar masses of 10,000, 30,000, and 100,000 g/mol) as indicated below:

(a) equal numbers of molecules of each sample,
(b) equal masses of each sample, and
(c) by mixing in the mass ratio 0.145: 0.855 the two samples with molar masses of 10,000 and 100,000 g/mol.

For each mixture calculate the number-average, weight-average molar mass and polydispersity.

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