Identify the atom that increases in oxidation number in the following redox reaction.

Question

2MnO2 + 2K2CO3 + O2 2KMnO4 + 2CO2

*A.) Mn
B.) O
C.) K
D.) C

Please show work

Thank you.

Answer 1

Mn goes from +4 on the left to +7 on the right.
O goes from zero on the left to -2 on the right.
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