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9 February, 20:24

N the reaction 2Cu2O (s) → 4Cu (s) + O2 (g) how does the oxidation number of the copper atoms change

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  1. 9 February, 21:31
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    Answer: The oxidation number of Cu decreased

    Explanation: In Cu2O equation Cu has an oxidation number of

    Cu+1 O-2

    then in the product side Cu is represented as a single element.

    The rule on oxidation number for an individual element is always O

    So Cu has 0 oxidation number.
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