СuO+H2=Cu+H2O
CuO+C=Cu+CO
3CuO+2Al=3Cu+Al2O3
2Fe + 3Cl₂ = 2FeCl₃
FeCl₃ + 3NaOH = 3NaCl + Fe(OH)₃↓
2Fe(OH)₃ = Fe₂O₃ + 3H₂O (при t°)
Fe₂O₃ + 3SO₃ = Fe₂(SO₄)₃
H2 + Cl2 -> 2HCl
2HCl + Fe -> FeCl2 + H2
FeCl2 + Mg -> MgCl2 + Fe
3MgCl2 + 2H3PO4 -> Mg3(PO4)2 + 6HCl
HCl + NaOH -> NaCl + H2O
W(CaCO3)=100%-12%=88%
m(CaCO3)=88%*2т/100%=1,76т
M(CaCO3)=100г/моль
M(СО2)=44г/моль
1,76т Хт
CaCO3=CaO+CO2
100г 44г
m(CO2)=Х=44г*1,76т/100г=0,7744т=774.4г