Превратить 1. Ca к Ca(OH)2 к CaCO3 к CaO к Ca(NO3)2
2. Na2CO3 к Na(OH) к Na к Na(OH)2 к Na2BeO2
2. Na2CO3 к Na(OH) к Na к Na(OH)2 к Na2BeO2
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Answers & Comments
Ca(OH)2+CO2=CaCO3+H2O
CaCO3=t=CaO↓+CO2↑
CaO+2HNO3=Ca(NO3)2+H2O
Na2CO3+Ba(OH)2=2NaOH+BaCO3↓
2NaOH=2Na+H2O+O2↑
2Na+2H2O=2NaOH+H2↑
Be(OH)2+2NaOH=Na2BeO2+2H2O (сплавление)