A polydisperse sample of polystyrene contains 5, 20, 50, 22, and 10 molecules with the corresponding molecular weights of 1000, 5000, 12000, 13000, and 14000 g mol-1 respectively. Calculate number average molecular weight (Mn), weight average molecular weight (Mw) and polydispersity index (PDI). Structures of four polymers are given below. Identify each polymer as conductive and non-conductive organic polymers and provide the reasons. a) (b) (d) (c) /hat are the fuel cells? Explain the role of electrolyte and polymer membrane in the Proton Exchange Membrane Fuel Cells (PEMFC).
A polydisperse sample of polystyrene contains 5, 20, 50, 22, and 10 molecules with the corresponding molecular weights of 1000, 5000, 12000, 13000, and 14000 g mol-1 respectively. Calculate number average molecular weight (Mn), weight average molecular weight (Mw) and polydispersity index (PDI). Structures of four polymers are given below. Identify each polymer as conductive and non-conductive organic polymers and provide the reasons. a) (b) (d) (c) /hat are the fuel cells? Explain the role of electrolyte and polymer membrane in the Proton Exchange Membrane Fuel Cells (PEMFC).
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
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A polydisperse sample of polystyrene contains 5, 20, 50, 22, and 10 molecules with the corresponding molecular weights of 1000, 5000, 12000,
13000, and 14000 g mol-1 respectively. Calculate number average molecular weight (Mn), weight average molecular weight (Mw) and
polydispersity index (PDI).
Structures of four polymers are given below. Identify each polymer as conductive and non-conductive organic polymers and provide the
reasons.
(a)
(b)
(c)
n (d)
What are the fuel cells? Explain the role of electrolyte and polymer membrane in the Proton Exchange Membrane Fuel Cells (PEMFC).
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D E G H
N.
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