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    Balancing electrons: Oxidation-reduction method

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    Please help balance the electrons in the following formulas:

    Sn+HNO3-------.SnO2+NO2+H2O
    Sn---->SnO2
    2H20+Sn-------->SnO2+4H+4e

    also, how do I balence this one
    Na+H2O----->NaOH+H2

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    https://brainmass.com/chemistry/oxidation-reduction-and-electrochemistry/balancing-electrons-oxidation-reduction-method-44290

    Solution Summary

    The following solution involves balancing electrons in various reactions using the oxidation-reduction method.

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