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8(e)Cu2S + S8 = 16 CuS
HCl + RbHCO3 = RbCl + H2CO3 =>
HCl + RbHCO3 = RbCl + H2CO3
H2 + S + O2{-} = S{2-} + H2O =>
4 H2 + S + 2 O2{-} = S{2-} + 4 H2O
KCl + Cl2 = KCl2 =>
2 KCl + Cl2 = 2 KCl2
SiF4 + H2O = H4SiO4 + H2SiF6 =>
3 SiF4 + 4 H2O = H4SiO4 + 2 H2SiF6
Fe(OH)3 + HCl = FeCl3 + H2O =>
Fe(OH)3 + 3 HCl = FeCl3 + 3 H2O
Na2SO3 + HCl = NaCl + H2O + SO2 =>
Na2SO3 + 2 HCl = 2 NaCl + H2O + SO2
K3(PO4) + Al(NO3)3 = KNO3 + AlPO4 =>
K3(PO4) + Al(NO3)3 = 3 KNO3 + AlPO4
C2H6 + Br = C2H5Br + HBr =>
C2H6 + 2 Br = C2H5Br + HBr
C6H5OH + Na = C6H5ONa + H2 =>
2 C6H5OH + 2 Na = 2 C6H5ONa + H2
Ga2(SO4)3 + BaCl2 = GaCl3 + BaSO4 =>
Ga2(SO4)3 + 3 BaCl2 = 2 GaCl3 + 3 BaSO4
HCl + NaOH = NaCl + H2O =>
HCl + NaOH = NaCl + H2O
HCOOH + KOH = KCOOH + H2O =>
HCOOH + KOH = KCOOH + H2O
(MgCa)(CO3)2 + H2SO4 = MgSO4 + CaSO4 + H2O + CO2 =>
(MgCa)(CO3)2 + 2 H2SO4 = MgSO4 + CaSO4 + 2 H2O + 2 CO2
Cl2 + Zn(OH)2 = ZnCl2 + H2O + O2 =>
2 Cl2 + 2 Zn(OH)2 = 2 ZnCl2 + 2 H2O + O2
As2S3 + HClO + H2O = H3AsO4 + HCl + H2SO4 =>
As2S3 + 14 HClO + 6 H2O = 2 H3AsO4 + 14 HCl + 3 H2SO4
Al2S + O2 = Al2O2 + S =>
Al2S + O2 = Al2O2 + S
HCOHCu(OH)2 = HCOOHCuH2O =>
HCOHCu(OH)2 = HCOOHCuH2O
NaNO2 + HI = NaI + HNO2 =>
NaNO2 + HI = NaI + HNO2
Fe(s) + HCl(g) = FeCl3(s) + H2(g) =>
2 Fe(s) + 6 HCl(g) = 2 FeCl3(s) + 3 H2(g)
(NH4)2SO4 + KOH = H2O + K2SO4 + NH3 =>
(NH4)2SO4 + 2 KOH = 2 H2O + K2SO4 + 2 NH3
C + P = C3P2 =>
3 C + 2 P = C3P2
NH4VO3 + HCl = NH4Cl + VO2Cl + H2O =>
NH4VO3 + 2 HCl = NH4Cl + VO2Cl + H2O
HCl + KReO4 + Zn = KRe + H2O + ZnCl2 =>
8 HCl + KReO4 + 4 Zn = KRe + 4 H2O + 4 ZnCl2
C2H5OH + Cr2O7{-}2 + H{+} = Cr3{+} + C2H4O + H2O =>
37 C2H5OH + 6 Cr2O7{-}2 + 10 H{+} = 4 Cr3{+} + 37 C2H4O + 42 H2O
(NH4)2S + HNO3 = NH4NO3 + H2S =>
(NH4)2S + 2 HNO3 = 2 NH4NO3 + H2S
[Ag(NH3)2]NO3 + CaC2 + H2O = C2Ag2 + NH4OH + NH4NO3 + CaO =>
2[Ag(NH3)2]NO3 + CaC2 + 3 H2O = C2Ag2 + 2 NH4OH + 2 NH4NO3 + CaO
Ca(OH)2 + CO2 = Ca(HCO3)2 =>
Ca(OH)2 + 2 CO2 = Ca(HCO3)2
MnO2 + O2 + NaOH = Na2MnO4 + H2O =>
2 MnO2 + O2 + 4 NaOH = 2 Na2MnO4 + 2 H2O
(NH4)2SO4 + KOH = H2O + K2SO4 + NH3 =>
(NH4)2SO4 + 2 KOH = 2 H2O + K2SO4 + 2 NH3
Al6 + MgCl2 + Li = Al3Cl + MgLi6 =>
Al6 + MgCl2 + 6 Li = 2 Al3Cl + MgLi6
Na3HP2O7 + H2O = Na3P2O7{-} + H3O{+} =>
Na3HP2O7 + H2O = Na3P2O7{-} + H3O{+}
Zn(OH)2 + NH3H2O = [Zn(NH3)4](OH)2 + H2O =>
Zn(OH)2 + 4 NH3H2O = [Zn(NH3)4](OH)2 + 4 H2O
H3PO4 + Mg = Mg3(PO4)2 + H2 =>
2 H3PO4 + 3 Mg = Mg3(PO4)2 + 3 H2
KOH(s) + CO2(g) = K2CO3(s) + H2O(g) =>
2 KOH(s) + CO2(g) = K2CO3(s) + H2O(g)
PbO2 + Ca = PbO + CaO =>
PbO2 + Ca = PbO + CaO
Mg2 + H2O = Mg(OH)2 + H2 =>
Mg2 + 4 H2O = 2 Mg(OH)2 + 2 H2
Li + N2 = NLi3 =>
6 Li + N2 = 2 NLi3
Na2CO3 + Ba(OH)2 = BaCO3 + NaOH =>
Na2CO3 + Ba(OH)2 = BaCO3 + 2 NaOH
K2Cr2O7 + HCl = KCl + CrCl3 + H2O + Cl2 =>
K2Cr2O7 + 14 HCl = 2 KCl + 2 CrCl3 + 7 H2O + 3 Cl2
CaCl2 + HCl = CaH2 + Cl =>
CaCl2 + 2 HCl = CaH2 + 4 Cl
Pb(CH3COO)2 + K2Cr2O7 = PbCr2O7 + K2(CH3COO)2 =>
Pb(CH3COO)2 + K2Cr2O7 = PbCr2O7 + K2(CH3COO)2
NaO + Ca = CaO + Na =>
NaO + Ca = CaO + Na
FeCl2 + Na3PO4 = Fe3(PO4)2 + NaCl =>
3 FeCl2 + 2 Na3PO4 = Fe3(PO4)2 + 6 NaCl
C6H8O6 + I2 = C6H6O6 + HI =>
C6H8O6 + I2 = C6H6O6 + 2 HI
C6H12 + H2O = C6H14O =>
C6H12 + H2O = C6H14O
FeCl2 + Na3PO4 = Fe3(PO4)2 + NaCl =>
3 FeCl2 + 2 Na3PO4 = Fe3(PO4)2 + 6 NaCl
C18H22 + O2 = CO2 + H2O =>
2 C18H22 + 47 O2 = 36 CO2 + 22 H2O
KNO3(aq) + H2CO3(aq) = K2CO3(aq) + HNO3 =>
2 KNO3(aq) + H2CO3(aq) = K2CO3(aq) + 2 HNO3
Na2O + I = NaI + O2 =>
2 Na2O + 4 I = 4 NaI + O2
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