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- Oxygen in almost all compounds has an oxidation # of (-2).

- Your solving for the oxidation # of Fe so make this (X)

- Creating an equation with what you know:

There are 2 Fe in the compound, so it would be 2X.

There are 3 O in the compound, so it would be (-2 * 3) = -6

2X - 6 = 0

-Do the algebra:

1) 2X = +6

2) X = +6/ 2

3) X = Fe = +3 oxidation number

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What are the oxidation numbers of the elements in Fe2O3?

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study island answer is +3 -2


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