(Answered) Identify the species that is oxidized and the species that

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Identify the species that is oxidized and the species that is reduced in each reaction. Write out two half reaction to show how many electrons are gained or lost by each species.

1]. Mg + Fe^2+--------Mg^2+ + Fe

2]. Cu^2+ + Sn ---------Sn^2+ + Cu

3]. 4Na +O₂ ---------2 Na₂O

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