Average molar mass within interval/(kg molF') interval/g Molar mass Mass of interval/ sample within (kg mol-1) 5-10 6.5 16.0 10-15 11.5 27.1 15-20 19.5 29.5 20-25 23.5 13.4 25-30 28.5 8.7 30-35 35.5 3.5

Average molar mass within interval/(kg molF') interval/g Molar mass Mass of interval/ sample within (kg mol-1) 5-10 6.5 16.0 10-15 11.5 27.1 15-20 19.5 29.5 20-25 23.5 13.4 25-30 28.5 8.7 30-35 35.5 3.5

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter21: Surface Characterization By Spectroscopy And Microscopy

Section: Chapter Questions

Problem 21.10QAP

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Question

Determine the dispersity of a sample of polystyrene from the following data:

Average molar
mass within
interval/(kg molF') interval/g
Molar mass
Mass of
interval/
sample within
(kg mol-1)
5-10
6.5
16.0
10-15
11.5
27.1
15-20
19.5
29.5
20-25
23.5
13.4
25-30
28.5
8.7
30-35
35.5
3.5

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