Answer
$CoO$
$Co_2O_3$
Work Step by Step
The oxide ion is $O^{2-}$.
For $Co^{2+}$: Both have the same charge, so $CoO$
For $Co^{3+}$: To balance the charges we need 3 $O^{2-}$ and 2 $Co^{3+}$: $Co_2O_3$
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 2 Atoms, Molecules, and Ions - Study Questions - Page 95c: 45
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