### Possible Answer

C2O42- COO - l COO - O always has an oxidation states of -2. So if there are 4 O atoms, with -2 each, it gives a total of -8. since the charge on the ... - read more

This answer is -1. To find this answer: Oxygen has an oxidation number of -2. Hydrogen has an oxidation number of +1, and there are 3 of them you want to get the ... - read more

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