General Chemistry: Principles and Modern Applications (10th Edition)

Published by Pearson Prentice Hal
ISBN 10: 0132064529
ISBN 13: 978-0-13206-452-1

Chapter 1 - Matter: Its Properties and Measurement - Exercises - Percent Composition - Page 29: 64


$15\,A's$, $21 \,B's$, $ 27\,C's$, $11\,D's$, $10\,F's$

Work Step by Step

We use the fractions to find the number of each category: $\frac{18}{100}\times84\,A's=15\,A's$ $\frac{25}{100}\times84\,B's=21 \,B's$ $\frac{32}{100}\times84\,C's= 27\,C's$ $\frac{13}{100}\times84\,D's=11\,D's$ $\frac{12}{100}\times84\,F's=10\,F's$
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