2. В
3. 2Hg+О2=2HgO
2HgO=2Hg+O2
O2+2C=2CO
2CO+O2=2CO2
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Answers & Comments
2. В
3. 2Hg+О2=2HgO
2HgO=2Hg+O2
O2+2C=2CO
2CO+O2=2CO2