Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 7 - Section 7.1 - The Mole - Questions and Problems - Page 216: 7.7b

Answer

There is a total of $1.0 \times 10^2$ moles of $C$ in 5.0 moles of $C_{20}H_{24}N_2O_2$.

Work Step by Step

1. Identify the conversion factor for $C_{20}H_{24}N_2O_2$ moles and $C$ moles. - Each $C_{20}H_{24}N_2O_2$ molecule has 20 carbon atoms (C). Therefore: $\frac{1mole(C_{20}H_{24}N_2O_2)}{20moles(C)}$ and $\frac{20moles(C)}{1mole(C_{20}H_{24}N_2O_2)}$ 2. Calculate the amount of $C$ (in moles), in $1.0$ moles of $C_{20}H_{24}N_2O_2$: $5.0 moles(C_{20}H_{24}N_2O_2) \times \frac{20moles(C)}{1mole(C_{20}H_{24}N_2O_2)} = 1.0 \times 10^2 $ moles $ (C)$
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