Zn(OH)2 =
NaOH + HC1 =
SO3 + NaOH =
Cu(OH)2 =
P2O5 + NaOH =
NaOH + FeCL3 =
H2SO4 + AL(OH)3 =
SO2 + Ba(OH)2 =
LiOH + CuCL2 =
Fe(OH)3 =
Ca(OH)2 + CO2 =
AL2(SO4)3 + KOH =
H3PO4 + Ba(OH)2 =
HNO3 + Ca(OH)2 =
AL(OH)3 =
Ba(OH)2 + Na2SO4 =
Mg + НС1 =
Na2CО3 + Н2SO4 =
NaOH + HC1 =
Na2 CO3 + H3PO4 =
Н2S04 + BaСl2 =
AL + НС1 =
H2SO3 + BaO =
HCL + K2 O =
H2SO4 + AL(OH)3 =
H3PO4 + Ba(OH)2 =
HNO3 + CaO =
Zn + Н2SO4 =
K2 CO3 + HCL =
Ca + H3PO4 =
Na2O + H3PO4 =
Zn(OH)2 + НС1 =
Mg + CuС12 =
Na2CО3 + Н2SO4 =
NaOH + FeC13 =
Li2 CO3 + H3PO4 =
Н2S04 + BaСl2 =
AL + CuBr2 =
H3PO4 + BaCL2 =
AgNO3 + CaCL2 =
Zn + CuSO4 =
K2 CO3 + HCL =
Ca3 (PO4 )2 =
ZnCL2 + Н3 PO4 =
AL2(SO4)3 + KOH =
Ba(OH)2 + Na2SO4 =
CaCO3 =
Mg + FeCL2 =
Дано (CaO)= 140г| Решение
m(Ca) - ? x y 140
2Ca + O2 = CaO
2 моль 1 моль 2 моль
x = 140 * 2 = 140
2
m = n * M M=Mr
Mr(Ca) = 40 г/моль
m(Ca) = 140 * 40 = 5600г
ответ:m(Ca)=5600г или 5.6кг
