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1) Consider the following substance: V3N5. What is the oxidation number of vanadium and nitrogen?

2) Consider the following substance: Mn2O7. What is the oxadation number of manganese and oxygen?

3) Consider the following reaction:
Al2(SO4)3. What is the oxidation number of aluminum, sulfur and oxygen?

  • Chemistry - ,

    I would call V +5 and N -3.
    Mn is +7 and oxygen is -2.
    Here is a good web site.

  • Chemistry - ,

    What is the oxidation numbers for ammonia

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