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Please, in the following reactions, show Half Reactions to decide which reactant is oxidized and which...

Please, in the following reactions, show Half Reactions to decide which reactant is oxidized and which is reduced.

Designate the oxidizing agent and reducing agent. Assign oxidation numbers to each atom.

1.a)

Si (s) + 2Cl2 (g) ----> SiCl4 (l)

1.b)

C2H4 (g) + 3O2 (g) ----> 2CO2 (g) + 2H2O (l)

Thank You!

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