А) CaO + 2CH3COOH = (CH3COO)2Ca + H2O
CaO + H2O = Ca(OH)2
CaO + 2HNO3 = Ca(NO3)2 + H2O
Б) 2HCl + Na2S = 2NaCl + H2S
HCl + AgNO3 = AgCl + HNO3
2HCl + Na2CO3 = 2NaCl + H2O + CO2
В) CuCl2 + Na2S = 2NaCl + CuS
CuCl2 + 2AgNO3 = 2AgCl + Cu(NO3)2
CuCl2 + Na2CO3 = 2NaCl + CuCO3
Г) Ba + 2CH3COOH = (CH3COO)2Ba + H2
Ba + 2H2O = Ba(OH)2 + H2
Ba + 4HNO3 = Ba(NO3)2 + 2NO2 + 2H2O
Ответ: 5335