Question: 3) Three mixtures were prepared from three monodisperse polystyrene samples (with molar masses of 20000, 50000, and 150000g mol!) as indicated below: (50 points) (a)

3) Three mixtures were prepared from three monodisperse polystyrene samples (with

3) Three mixtures were prepared from three monodisperse polystyrene samples (with molar masses of 20000, 50000, and 150000g mol!) as indicated below: (50 points) (a) equal numbers of molecules of each sample, (b) equal masses of each sample, and (e) by mixing in the mass ratio 0.125:0.875 the two samples with molar masses of 20000 and 150000g mol!. For each of the mixtures calculate the number-average, , and weight-average, , molar mass and comment upon the meaning of the /values

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