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OpenStudy (anonymous):
In the compound Fe2O3, iron's oxidation number is ______, while oxygen's oxidation number is -2.
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OpenStudy (xishem):
The oxidation number of the entire molecule must equal the net charge of the molecule. Since the net charge is 0...\[2(Fe)+3(O_2)=0\]Where Fe and O_2 represent the oxidation numbers of each ion. \[2(Fe)+3(-2)=0 \rightarrow Fe=+3\]
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