Answer
$17.7\%$
Work Step by Step
For 1 mol of mixture:
$0.20\ mol\ hexane \times 86.178\ g/mol=17.24\ g$
$0.80\ mol\ hexane \times 86.178\ g/mol=80.16\ g$
Mass fraction of hexane:
$\dfrac{17.24}{17.24+80.16}=0.177\ or\ 17.7\%$
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 13 Solutions and Their Behavior - 13-5 Colloids - Applying Chemical Principles - Questions - Page 502: 3
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