Balance each of the following RedOx reactions occurring in acidic conditions:
Br2(l) + SO2(g) → Br1-(aq) + SO42-(aq)
HgS(s) + Cl1-(aq) + NO31-(aq) → HgCl42-(aq) + NO2(g) + S(s)
Cl2(g) → ClO31-(aq) + Cl1-(aq)

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