Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 3 - Section 3.4 - The Mole and Molar Masses - Checkpoint - Page 99: 3.4.3

Answer

a) CH is the correct answer.

Work Step by Step

1. Assume a 100 g sample and calculate the amount of moles. C: $$ 92.3 \space g \times \frac{1 \space mole}{ 12.01 \space g} = 7.7 \space moles$$ H: $$ 7.7 \space g \times \frac{1 \space mole}{ 1.008 \space g} = 7.6 \space moles$$ 2. The formula is $C_{7.7}H_{7.6}$. 3. Dividing both numbers by 7.6: $C_{1.01}H_{1}$, which we can approximate to $C_1H_1$ or CH.
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