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3 Fe + 4 H2O = Fe3O4 + 4 H2
SO2 + O2 = SO3 =>
2 SO2 + O2 = 2 SO3
Cu + FeCl3 = CuCl2 + Fe =>
3 Cu + 2 FeCl3 = 3 CuCl2 + 2 Fe
HI(aq) + Li2S(aq) = LiI(aq) + H2S(g) =>
2 HI(aq) + Li2S(aq) = 2 LiI(aq) + H2S(g)
CaF2 + Li2SO4 = CaSO4 + LiF =>
CaF2 + Li2SO4 = CaSO4 + 2 LiF
KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2 =>
2 KMnO4 + 16 HCl = 2 KCl + 2 MnCl2 + 8 H2O + 5 Cl2
NH4OH + H3PO4 = (NH4)3PO4 + H2O =>
3 NH4OH + H3PO4 = (NH4)3PO4 + 3 H2O
Ca(NO3)2 + Na2S = CaS + (NO3)2Na2 =>
Ca(NO3)2 + Na2S = CaS + (NO3)2Na2
***A1 + ***S = ***A12S3 =>
12***A1 + 3***S = ***A12S3
H3PO4 = P2O5 + H2O =>
2 H3PO4 = P2O5 + 3 H2O
SiH4 + NaOH + H2O = NaSiO3 + H2 =>
2 SiH4 + 2 NaOH + 4 H2O = 2 NaSiO3 + 9 H2
CaCl2 + K3PO4 = Ca3(PO4)2 + KCl =>
3 CaCl2 + 2 K3PO4 = Ca3(PO4)2 + 6 KCl
C2H2 + O2 = CO2 + H2O =>
2 C2H2 + 5 O2 = 4 CO2 + 2 H2O
Mg + C = Mg2C2 =>
2 Mg + 2 C = Mg2C2
(NH4)3PO4 + CrBr3 = NH4Br + CrPO4 =>
(NH4)3PO4 + CrBr3 = 3 NH4Br + CrPO4
Na2CO3 + RuO2 + Co3O4 = CO2 + Co2RuO4 + Na2RuO4 =>
2 Na2CO3 + 5 RuO2 + 2 Co3O4 = 2 CO2 + 3 Co2RuO4 + 2 Na2RuO4
Al + CaOH2 = Ca + Al(OH2)3 =>
Al + 3 CaOH2 = 3 Ca + Al(OH2)3
HCCOH + H2O = CH3OH + HCOOH =>
HCCOH + 2 H2O = CH3OH + HCOOH
Hg(NO3)2 + K2CrO4 = HgCrO4 + K2(NO3)2 =>
Hg(NO3)2 + K2CrO4 = HgCrO4 + K2(NO3)2
OF + H2O = O2 + HF =>
4 OF + 2 H2O = 3 O2 + 4 HF
Zn + HCl = ZnCl2 + H2 =>
Zn + 2 HCl = ZnCl2 + H2
CH3CHCH3 + O2 = CO2 + H2O =>
4 CH3CHCH3 + 19 O2 = 12 CO2 + 14 H2O
C2H5CHO + [Ag(NH3)2]OH = HCOONH4 + Ag + NH3 + H2O =>
C2H5CHO + 10[Ag(NH3)2]OH = 3 HCOONH4 + 10 Ag + 17 NH3 + 5 H2O
Mg2(s) + O(g) = MgO(s) =>
Mg2(s) + 2 O(g) = 2 MgO(s)
Fe + O2 = Fe2O3 =>
4 Fe + 3 O2 = 2 Fe2O3
Fe + Na2CO3 = Fe2(CO3)3 + Na =>
2 Fe + 3 Na2CO3 = Fe2(CO3)3 + 6 Na
Au + H2O = AuO + H2 =>
Au + H2O = AuO + H2
N2O5 = N2O4 + O2 =>
2 N2O5 = 2 N2O4 + O2
CH3COOH + ZnCO3 = (CH3COO)2Zn + CO2 + H2O =>
2 CH3COOH + ZnCO3 = (CH3COO)2Zn + CO2 + H2O
C7H5ClO2 + NaOH = C7H4ClO2 + H2O + Na =>
C7H5ClO2 + NaOH = C7H4ClO2 + H2O + Na
Cl2O + HgO = ClHg2 + O2 =>
2 Cl2O + 8 HgO = 4 ClHg2 + 5 O2
I2(s) + Br2(s) = Br2I =>
I2(s) + 2 Br2(s) = 2 Br2I
H2SO4 + Ca5F(PO4)3 = H3PO4 + CaSO4 + HF =>
5 H2SO4 + Ca5F(PO4)3 = 3 H3PO4 + 5 CaSO4 + HF
OH{-} + Sn(OH)3{-} + Bi(OH)3 = Bi + Sn(OH)6{2-} =>
3 OH{-} + 3 Sn(OH)3{-} + 2 Bi(OH)3 = 2 Bi + 3 Sn(OH)6{2-}
HI + AI = AII + H2 =>
2 HI + 2 AI = 2 AII + H2
Na2SO4 + Ca(NO3)2 = NaNO3 + CaSO4 =>
Na2SO4 + Ca(NO3)2 = 2 NaNO3 + CaSO4
B4C + NaIO4 = B2O3 + CO2 + NaI =>
B4C + 2 NaIO4 = 2 B2O3 + CO2 + 2 NaI
NaBr + H2SO4 = NaHSO4 + SO2 + Br2 + H2O =>
2 NaBr + 3 H2SO4 = 2 NaHSO4 + SO2 + Br2 + 2 H2O
HCl(aq) + MnO2(s) = MnCl2 + H2O + Cl =>
4 HCl(aq) + MnO2(s) = MnCl2 + 2 H2O + 2 Cl
H3PO3 + KOH = K2HPO3 + H2O =>
H3PO3 + 2 KOH = K2HPO3 + 2 H2O
Zn + Ni(C2H3O2)2 = Ni2 + Zn(C2H3O2) =>
4 Zn + 2 Ni(C2H3O2)2 = Ni2 + 4 Zn(C2H3O2)
NH3 + O2 = NO2 + H3 =>
NH3 + O2 = NO2 + H3
H + Ar = HAr =>
H + Ar = HAr
Rb + P = Rb3P =>
3 Rb + P = Rb3P
OH + H3PO4 = H2O + PO43 =>
81 OH + H3PO4 = 42 H2O + PO43
N2O7 + KOH + CrI3 = NO + K2CrO4 + KI + H2O =>
3 N2O7 + 50 KOH + 10 CrI3 = 6 NO + 10 K2CrO4 + 30 KI + 25 H2O
NaCl3 + AuCH3COO = AuCl3 + CH3COONa =>
NaCl3 + AuCH3COO = AuCl3 + CH3COONa
H2CO3 + (OH)3Al = H2O + Al2(CO3)3 =>
3 H2CO3 + 2(OH)3Al = 6 H2O + Al2(CO3)3
CaCl2 + K2CO3 = K2Cl2 + Ca + (CO3)2 =>
2 CaCl2 + 2 K2CO3 = 2 K2Cl2 + 2 Ca + (CO3)2
Fe3O4 + H2 = Fe + H2O =>
Fe3O4 + 4 H2 = 3 Fe + 4 H2O
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