2Сa+O2=2CaO 2 H2+O2=2H2O
CaCO3=CaO+CO2 2H2O=2H2+O2
HCl+NaOH=NaCl+H2O CaCO3+2HcL=CaCl2+CO2+H2O
2Na+2HCl=2NaCl+H2 Ca+H2SO4=CaSO4+H2
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2Сa+O2=2CaO 2 H2+O2=2H2O
CaCO3=CaO+CO2 2H2O=2H2+O2
HCl+NaOH=NaCl+H2O CaCO3+2HcL=CaCl2+CO2+H2O
2Na+2HCl=2NaCl+H2 Ca+H2SO4=CaSO4+H2