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3 Fe + 2 O2 = Fe3O4
Pb(NO3)2(aq) + NaCl = PbCl2(s) + NaNO3(aq) =>
Pb(NO3)2(aq) + 2 NaCl = PbCl2(s) + 2 NaNO3(aq)
NaHCO3 = Na2CO3 + CO2 + H2O =>
2 NaHCO3 = Na2CO3 + CO2 + H2O
Pb4 + OH = Pb(OH)4 =>
Pb4 + 16 OH = 4 Pb(OH)4
FeSO4 + NaOH = Fe(OH)2 + Na2SO4 =>
FeSO4 + 2 NaOH = Fe(OH)2 + Na2SO4
HCN(g) + O2(g) = N2(g) + CO2(g) + H2O(l) =>
4 HCN(g) + 5 O2(g) = 2 N2(g) + 4 CO2(g) + 2 H2O(l)
Na2CO3 + HCl = NaCl + H2O + CO2 =>
Na2CO3 + 2 HCl = 2 NaCl + H2O + CO2
KClO3 = KCl + O2 =>
2 KClO3 = 2 KCl + 3 O2
SiCl4 + H2O = SiO2 + HCl =>
SiCl4 + 2 H2O = SiO2 + 4 HCl
H2S + OCl{-} = SO4{-2} + Cl{-} + H{+} =>
H2S + 4 OCl{-} = SO4{-2} + 4 Cl{-} + 2 H{+}
NaOH + KOOCC6H4COOH = KOOCC6H4COONa + H2O =>
NaOH + KOOCC6H4COOH = KOOCC6H4COONa + H2O
SiO2 + NaOH = Na2SiO3 + H2O =>
SiO2 + 2 NaOH = Na2SiO3 + H2O
Cl2 + Fl2 = ClFl =>
Cl2 + Fl2 = 2 ClFl
C3H6O + HCN + H2O = C4H7NO4 + NH3 =>
2 C3H6O + 14 HCN + 18 H2O = 5 C4H7NO4 + 9 NH3
PbNO4 + NaCO3 = PbCO3 + NaNO4 =>
PbNO4 + NaCO3 = PbCO3 + NaNO4
Ba(OH)2 + KMnO4 = KOH + BaMnO4 + H2O + O2 =>
4 Ba(OH)2 + 4 KMnO4 = 4 KOH + 4 BaMnO4 + 2 H2O + O2
K2Cr2O7 + KNO2 + NaOH + H2O = Na3[Cr(OH)6] + KNO3 + KOH =>
K2Cr2O7 + 3 KNO2 + 6 NaOH + 4 H2O = 2 Na3[Cr(OH)6] + 3 KNO3 + 2 KOH
C14H10O2 + NaBH4 = C14H11O2 + NaBH3 =>
C14H10O2 + NaBH4 = C14H11O2 + NaBH3
Ba(HCO3)2(s) + HCl(aq) = BaCl2 + H2CO3 =>
Ba(HCO3)2(s) + 2 HCl(aq) = BaCl2 + 2 H2CO3
C16H17NO3 + PBr3 = C16H16BrNO2 + PBr2OH =>
C16H17NO3 + PBr3 = C16H16BrNO2 + PBr2OH
As2S3 + H2O2 + OH{-} = AsO43{-} + SO42{-} + H2O =>
2 As2S3 + 419 H2O2 + 10 OH{-} = 4 AsO43{-} + 6 SO42{-} + 424 H2O
C2H4O2 + O2 = CO2 + H2O =>
C2H4O2 + 2 O2 = 2 CO2 + 2 H2O
CO(NO3)2 + NH3 + (NH4)2CO3 = [CO(NH3)4CO3]NO3 + NH4NO3 =>
19 CO(NO3)2 + 56 NH3 + 13(NH4)2CO3 = 16[CO(NH3)4CO3]NO3 + 20 NH4NO3
B2Br6 + HNO3 = B(NO3)3 + HBr =>
B2Br6 + 6 HNO3 = 2 B(NO3)3 + 6 HBr
OH{-} + H2O + Zn + BrO4{-} = Zn(OH)4{2-} + Br{-} =>
8 OH{-} + 4 H2O + 4 Zn + BrO4{-} = 4 Zn(OH)4{2-} + Br{-}
K(SO4) + SrI2 = KI + Sr(SO4)2 =>
2 K(SO4) + SrI2 = 2 KI + Sr(SO4)2
O2 = O3 =>
3 O2 = 2 O3
HCl + AqNO3 = HNO3 + AqCl =>
HCl + AqNO3 = HNO3 + AqCl
Cr = Cr6 =>
6 Cr = Cr6
Fe + O2 = Fe2O3 =>
4 Fe + 3 O2 = 2 Fe2O3
HCl + AqNO3 = HNO3 + AqCl =>
HCl + AqNO3 = HNO3 + AqCl
AgNO3 + HCl = AgCl + HNO3 =>
AgNO3 + HCl = AgCl + HNO3
As2S3 + H2O2 + OH{-} = AsO43{-} + SO42{-} + H2O =>
2 As2S3 + 419 H2O2 + 10 OH{-} = 4 AsO43{-} + 6 SO42{-} + 424 H2O
HCl + AqNO3 = HNO3 + AqCl =>
HCl + AqNO3 = HNO3 + AqCl
(CH3)2CHCH2OH + HCl = (CH3)2CHCH2Cl + H2O =>
(CH3)2CHCH2OH + HCl = (CH3)2CHCH2Cl + H2O
CH3COOH = CH2CO + H2O =>
CH3COOH = CH2CO + H2O
HCl + CaCO3 = CaCl2 + H2O + CO2 =>
2 HCl + CaCO3 = CaCl2 + H2O + CO2
NH3(g) + Cl2(g) = NCl3(g) + H2(g) =>
2 NH3(g) + 3 Cl2(g) = 2 NCl3(g) + 3 H2(g)
Si + HNO3 = SiO + NO + H2O =>
3 Si + 2 HNO3 = 3 SiO + 2 NO + H2O
Al + O2 = Al2O3 =>
4 Al + 3 O2 = 2 Al2O3
CaCl2 + NaCH3COO = Ca(CH3COO)2 + NaCl =>
CaCl2 + 2 NaCH3COO = Ca(CH3COO)2 + 2 NaCl
H3PO4 + KOH = (K2HPO4)2 + H2O =>
2 H3PO4 + 4 KOH = (K2HPO4)2 + 4 H2O
Mg + HCl = H4 + MgCl2 =>
2 Mg + 4 HCl = H4 + 2 MgCl2
Fe(CO)5 + PF3 + H25 = Fe(CO)2(PF3)2(H)2 + CO =>
25 Fe(CO)5 + 50 PF3 + 2 H25 = 25 Fe(CO)2(PF3)2(H)2 + 75 CO
C3H6 + H2SO4 = S + H2CO3 + H2 =>
4 C3H6 + 9 H2SO4 = 9 S + 12 H2CO3 + 9 H2
Br + H2SO3 + H2O = H2SO4 + HBr =>
2 Br + H2SO3 + H2O = H2SO4 + 2 HBr
Hg(OH)2 + H3PO4 = Hg3(PO4)2 + H2O =>
3 Hg(OH)2 + 2 H3PO4 = Hg3(PO4)2 + 6 H2O
Cl + HNO2 = Cl(NO2)2 + NO + H2O =>
Cl + 4 HNO2 = Cl(NO2)2 + 2 NO + 2 H2O
FeSO4 + (NH4)2S = FeS + (NH4)2SO4 =>
FeSO4 + (NH4)2S = FeS + (NH4)2SO4
H2SO4(dil) + BaCl2(s) = BaSO4(pp) + HCl(l) =>
H2SO4(dil) + BaCl2(s) = BaSO4(pp) + 2 HCl(l)
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