Editing Answer To Balancing Redox Reaction By Oxidation Number
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<br> 1) Al<sup>0</sup> is oxidized, Mn<sup>+4</sup> is reduced, <nowiki>MnO</nowiki><sub>2</sub> is oxidizing agent, Al is reducing agent, coefficients - 4,3,2,3<br> <br> 2) S<sup>-2</sup> is oxidized, N<sup>+5</sup> is reduced, <nowiki>HNO</nowiki><sub>3</sub>is oxidizing agent, H<sub>2</sub>S is reduced agent, coefficients - 2,3,3,2,4<br> <br> 3) C<sup>-4</sup> is oxidized, O<sub>2</sub> is reduced, O<sub>2</sub> is oxidizing agent, CH<sub>4</sub> is reduced agent, coefficients - 1,2,1,2<br> <br> 4) Cl<sup> -1</sup> is oxidized, Cr<sup>+6</sup> is reduced, K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> is oxidizing agent, <nowiki>HCl</nowiki> is reduced agent, coefficients - 1,14,2,2,7,3<br> <br>
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