Ответ:
4Na+O2=Na2O
Na2O+H2O=2NaOH
2NaOH+CO2=Na2CO3 +H2O
Na2CO3+H2SO4=Na2SO4+CO2+H2O
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Ответ:
4Na+O2=Na2O
Na2O+H2O=2NaOH
2NaOH+CO2=Na2CO3 +H2O
Na2CO3+H2SO4=Na2SO4+CO2+H2O