General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 7 - Chemical Reactions and Quantities - 7.6 Mole Relationships in Chemical Equations - Questions and Problems - Page 262: 7.59

Answer

a. 1.0 mole b. 10. moles c. 5.0 moles

Work Step by Step

a. Find the conversion factors, and calculate the amount of $ O_2 $ moles $ H_2 $ and $ O_2 $: $$ \frac{ 2 \space moles \space H_2 }{ 1 \space mole \space O_2 } \space and \space \frac{ 1 \space mole \space O_2 }{ 2 \space moles \space H_2 }$$$$ 2.0 \space moles \space H_2 \times \frac{ 1 \space mole \ O_2 }{ 2 \space moles \space H_2 } = 1.0 \space mole \space O_2 $$ b. Find the conversion factors, and calculate the amount of $ H_2 $ moles $ O_2 $ and $ H_2 $: $$ \frac{ 1 \space mole \space O_2 }{ 2 \space moles \space H_2 } \space and \space \frac{ 2 \space moles \space H_2 }{ 1 \space mole \space O_2 }$$ $$ 5.0 \space moles \space O_2 \times \frac{ 2 \space moles \ H_2 }{ 1 \space mole \space O_2 } = 10. \space moles \space H_2 $$ c. Find the conversion factors, and calculate the amount of $ H_2O $ moles. $ O_2 $ and $ H_2O $: $$ \frac{ 1 \space mole \space O_2 }{ 2 \space moles \space H_2O } \space and \space \frac{ 2 \space moles \space H_2O }{ 1 \space mole \space O_2 }$$ $$ 2.5 \space moles \space O_2 \times \frac{ 2 \space moles \ H_2O }{ 1 \space mole \space O_2 } = 5.0 \space moles \space H_2O $$
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