Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 3 Chemical Reactions - Study Questions - Page 137c: 48

Answer

B and C

Work Step by Step

A) No changes in the oxidation numbers. B) Changes in the oxidation number: $Ca/CaO$: $Ca :0\rightarrow+2$ $O_2/CaO$: $O:0\rightarrow-2$ C) Changes in the oxidation number: $Fe(OH)_2/Fe(OH)_3$: $Fe :+2\rightarrow+3$ $O_2/Fe(OH)_3$: $O:0\rightarrow-2$

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