Ответ:
1)H2+S=H2S
2)2H2S+3O2=2SO2+2H2O
3)SO2+2O2=2SO3
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Ответ:
1)H2+S=H2S
2)2H2S+3O2=2SO2+2H2O
3)SO2+2O2=2SO3