14.4 The following table lists molecular weightdata for a polytetrafluoroethylene material.Compute the following:(a) the number-averagemolecular weight(b) the weight-average molecular weight(c) the degree of polymerizationMolecular WeightRange (g/mol)10,000-20,00020,000-30,00030,000-40,00040,000-50,00050,000-60,00060,000-70,00070,000-80,00080,000-90,000Xi0.030.090.150.250.220.140.080.04Wi0.010.040.110.230.240.180.120.07

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14.4 The following table lists molecular weight data for a polytetrafluoroethylene material. Compute the following: (a) the number-average molecular weight (b) the weight-average molecular weight (c) the degree of polymerization

14.4 The following table lists molecular weight data for a polytetrafluoroethylene material. Compute the following: (a) the number-average molecular weight (b) the weight-average molecular weight (c) the degree of polymerization

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.

Question

14.4 The following table lists molecular weight
data for a polytetrafluoroethylene material.
Compute the following:
(a) the number-average
molecular weight
(b) the weight-average molecular weight
(c) the degree of polymerization
Molecular Weight
Range (g/mol)
10,000-20,000
20,000-30,000
30,000-40,000
40,000-50,000
50,000-60,000
60,000-70,000
70,000-80,000
80,000-90,000
Xi
0.03
0.09
0.15
0.25
0.22
0.14
0.08
0.04
Wi
0.01
0.04
0.11
0.23
0.24
0.18
0.12
0.07

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