Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 1 - Chemical Foundations - Additional Exercises - Page 38: 89


0.01 kg of Lipitor per 100 pills.

Work Step by Step

each bill weights 2.5 grams and has exactly 4% of the active ingredient. thus, each pill has: 2.5 grams $\times$ $(4\div100)$ = 0.1 grams of Lipitor. Therefore, 100 pills contains $(100 \times 0.1 grams)$ = 10 grams/100 pills. to convert into kilograms as the questions asks: $ 10 grams \times \frac{1 kg}{1000 grams} = 0.01 kg$
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