Chemistry 9th Edition

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

Chapter 3 - Stoichiometry - Exercises: 66

Answer

a. $1.03*10^{-4}\text{ mol caffeine}$ b. $3.77*10^{-3}\text{ moles ethanol}$ c. $3.41*10^{-2}\text{ moles $CO_2$}$

Work Step by Step

a. $0.0200\text{ grams caffeine}*\frac{1\text{ mol caffeine}}{194.1906\text{ grams caffeine}}=1.03*10^{-4}\text{ mol caffeine}$ b. $2.27*10^{21}\text{ molecules ethanol}*\frac{1\text{ mol ethanol}}{6.0221*10^{23}\text{ molecules ethanol}}=3.77*10^{-3}\text{ moles ethanol}$ c. $1.50\text{ grams $CO_2$}*\frac{1\text{ mol $CO_2$}}{44.0095\text{ grams $CO_2$}}=3.41*10^{-2}\text{ moles $CO_2$}$
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