Ответ:
Na2CO3+2HCl=2NaCl+CO2+H2O
или
K2S+4HNO3=KNO3+2NO2+S+2H2O
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Ответ:
Na2CO3+2HCl=2NaCl+CO2+H2O
или
K2S+4HNO3=KNO3+2NO2+S+2H2O