Answer
+4
Work Step by Step
Recall that the sum of all of the oxidation numbers must be 0 in this molecule. We know that the oxidation number of oxygen is -2. Thus, the oxidation number of Mn must be +4.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 3 - Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 148d: 50e
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