Ответ:
1)S+O2 → SO2
2)SO2+O2 → SO3
3)SO3+H2O → H2SO4
4)H2SO4+Na → Na2SO4+H2
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Ответ:
1)S+O2 → SO2
2)SO2+O2 → SO3
3)SO3+H2O → H2SO4
4)H2SO4+Na → Na2SO4+H2