1.Hg+S=HgS
2. 2Hgs+3O2=2SO2+2HgO
3.SO2+2NaOH=Na2SO3+H2O
4. Na2SO3+2HCl=SO2+2NaCl+H2O
5. SO2+O2=SO3
6.SO3+H2O=H2SO4
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Answers & Comments
1.Hg+S=HgS
2. 2Hgs+3O2=2SO2+2HgO
3.SO2+2NaOH=Na2SO3+H2O
4. Na2SO3+2HCl=SO2+2NaCl+H2O
5. SO2+O2=SO3
6.SO3+H2O=H2SO4