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An oxidation number of 3 means that the element has a charge within the compound of +3. For example: AlCl3 (Aluminum chloride). Cl has a charge of -1 because it gains 1 electron during bonding to become stable so Al has to have a charge of +3 to balance the overall charge of the compound to zero.

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What are the oxidation numbers of kmno4 plus kno2 plus h2so4 equals mnso4 plus H2O plus kno3 plus k2so4 oxidation numbers?

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