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svetka1574
1) 2Cu+O2=2CuO
CuO+2HCl=CuCl2+H2O
CuCl2+2NaOH=Cu(OH)2+2NaCl

2)2Mg+O2=2MgO
MgO+H2O=Mg(OH)2
Mg(OH)2+H2SO4=MgSO4+2H2O
3) C+O2=CO2
CO2+Na2O=Na2CO3
Na2CO3+2HCl=2NaCl+CO2+H2O
CO2+CaO=CaCO3

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