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: 59b

Answer

Mass fraction= 0.0836 Weight percent= $ 8.36\%$

Work Step by Step

Mass fraction of ethanol= $\frac{mass\,of\,ethanol}{mass\,of\, ethanol+mass\,of\, benzene}= \frac{4.56\,g}{4.56\,g+50.0\,g}$ $=0.0836$ Weight percent= mass fraction$\times100\%$ $=0.0836\times100\%=8.36\%$

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