QUESTION 3 A blend of four monodisperse polystyrene (PS) samples was produced. The molecular weights and weight fractions of each monodisperse PS sample are shown in the following table. Sample MW Number (g/mol) fraction 1 10,000 Weight fraction 0.15 MN MW PDI 2 30,000 0.25 3 60,000 0.40 4 100,000 0.20 Blend What is the number-average molecular weight of the blend? 50,000 g/mol ○ 31,000 g/mol ○ 53,000 g/mol ○ 75,000 g/mol

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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QUESTION 3
A blend of four monodisperse polystyrene (PS) samples was produced. The molecular weights and weight fractions of each monodisperse PS sample are shown in the following table.
Sample
MW
Number
(g/mol)
fraction
1
10,000
Weight
fraction
0.15
MN
MW
PDI
2
30,000
0.25
3
60,000
0.40
4
100,000
0.20
Blend
What is the number-average molecular weight of the blend?
50,000 g/mol
○ 31,000 g/mol
○ 53,000 g/mol
○ 75,000 g/mol
Transcribed Image Text:QUESTION 3 A blend of four monodisperse polystyrene (PS) samples was produced. The molecular weights and weight fractions of each monodisperse PS sample are shown in the following table. Sample MW Number (g/mol) fraction 1 10,000 Weight fraction 0.15 MN MW PDI 2 30,000 0.25 3 60,000 0.40 4 100,000 0.20 Blend What is the number-average molecular weight of the blend? 50,000 g/mol ○ 31,000 g/mol ○ 53,000 g/mol ○ 75,000 g/mol
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