Answer
Mass fraction= 0.106
Weight percent= $10.6\%$
Work Step by Step
Mass fraction of NaCl= $\frac{mass\,of\,NaCl}{mass\,of\,NaCl+mass\,of\,H_{2}O}$
$=\frac{20.7\,g}{20.7\,g+175\,g}=0.106$
Weight percent= mass fraction$\times$ 100%
$=10.6\%$
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 13 - The Chemistry of Solutes and Solutions - Questions for Review and Thought - Topical Questions - Page 605c: 58a
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