(a) Compute the number-average molecular weight of the PMMA sample in g/mol. Give answer with at least four (4) significant figures. Do NOT write answer in scientific notation. (b) Compute the degree of polymerization of the PMMA sample. Give answer with at least four (4) significant figures. Do NOT write answer in scientific notation. (c) Is it possible to have a PMMA homopolymer with the given molecular weight data, and a degree of polymerization of 527? Yes or No

Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
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Chapter15: Solutions
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The molecular weight distribution for a sample of poly(methyl methacrylate) (PMMA) is given
in the attached image.

(a) Compute the number-average molecular weight of the PMMA sample in g/mol. Give answer with at least four (4) significant figures. Do NOT write answer in scientific notation.

(b) Compute the degree of polymerization of the PMMA sample. Give answer with at least four (4) significant figures. Do NOT write answer in scientific notation.

(c) Is it possible to have a PMMA homopolymer with the given molecular weight data, and a degree of polymerization of 527? Yes or No? Show your explanation or calculation in the answer sheet.

 

Molecular Weight
Range (g/mol)
8,000-20,000
20,000-32,000
32,000-44,000
44,000-56,000
56,000-68,000
68,000-80,000
80,000-92,000
Wi
0.02
0.08
0.17
0.29
0.23
0.16
0.05
X₁
0.05
0.15
0.21
0.28
0.18
0.10
0.03
Transcribed Image Text:Molecular Weight Range (g/mol) 8,000-20,000 20,000-32,000 32,000-44,000 44,000-56,000 56,000-68,000 68,000-80,000 80,000-92,000 Wi 0.02 0.08 0.17 0.29 0.23 0.16 0.05 X₁ 0.05 0.15 0.21 0.28 0.18 0.10 0.03
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