a) Cl2;
Ca + 2HCl → CaCl2 + H2;
b) O2;
2Mg + O2 → 2MgO
c) S;
2H2S + 3O2 → 2H2O + 2SO2.
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a) Cl2;
Ca + 2HCl → CaCl2 + H2;
b) O2;
2Mg + O2 → 2MgO
c) S;
2H2S + 3O2 → 2H2O + 2SO2.