Chemistry: The Molecular Science (5th Edition)

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: 58d


Mass fraction= 0.0284 Weight percent= 2.84%

Work Step by Step

Mass of benzene= $density\times volume$ $=0.877\,g/mL\times4.00\,mL=3.508\,g$ Mass fraction of benzene= $\frac{mass\, of\, benzene}{mass\,of\, benzene+mass\,of \,diethyl\,ether}=\frac{3.508\,g}{3.508\,g+120.\,g}=0.0284$ Weight percent= mass fraction$\times 100\%$ $=2.84\%$
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