1) 2HgO = 2Hg + O2
2) 3O2 + 4Fe = 2Fe2O3
3) O2 + 2H2 = 2H2O
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1) 2HgO = 2Hg + O2
2) 3O2 + 4Fe = 2Fe2O3
3) O2 + 2H2 = 2H2O