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: 58b

Answer

Mass fraction= 0.127 Weight percent= $12.7\%$

Work Step by Step

Mass fraction of ethanol= $\frac{mass\,of\, ethanol}{mass\,of\, ethanol+mass\,of\,water}=\frac{1.45\,g}{1.45\,g+10.0\,g}$ $=0.127$ Weight percent= mass fraction$\times100\%$ $=0.127\times100\%$ $=12.7\%$
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