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2 Cu2O + 3 S = 2 Cu2S + SO2
FeCl2 + K2Cr1O7 + HCl = FeCl3 + KCl + CrCl3 + H2O =>
9 FeCl2 + K2Cr1O7 + 14 HCl = 9 FeCl3 + 2 KCl + CrCl3 + 7 H2O
C12H14 + O2 = CO2 + H2O =>
2 C12H14 + 31 O2 = 24 CO2 + 14 H2O
KI + FeCl2 = KCl + Fe + I2 =>
2 KI + FeCl2 = 2 KCl + Fe + I2
H2CO3 + H2O = H4CO3 + HO =>
H2CO3 + 2 H2O = H4CO3 + 2 HO
C + HNO3 = N3 + CO2 + H2O =>
15 C + 12 HNO3 = 4 N3 + 15 CO2 + 6 H2O
HCl + KOH = KCl + H2O =>
HCl + KOH = KCl + H2O
CH3CH2CH2CH3 + Cl2 = CH3CH(Cl)CH3 + HCl =>
3 CH3CH2CH2CH3 + 3 Cl2 = 4 CH3CH(Cl)CH3 + 2 HCl
SO2 + O2 = SO3 = =>
2 SO2 + O2 = 2 SO3
(CH3)CH3CH(OH)CH3 + K2Cr2O7 + HCl = C3H6O + KCl + CrCl3 + H2O =>
18(CH3)CH3CH(OH)CH3 + 11 K2Cr2O7 + 88 HCl = 24 C3H6O + 22 KCl + 22 CrCl3 + 71 H2O
Na2CO3 + Co(NO3)2 = Na2(NO3) + Co(CO3)2 =>
2 Na2CO3 + Co(NO3)2 = 2 Na2(NO3) + Co(CO3)2
Na2SO4(aq) + KCSN(aq) = NaSCN + K2SO4 =>
Na2SO4(aq) + 2 KCSN(aq) = 2 NaSCN + K2SO4
C2H5NH2(g) + O2(g) = CO2(g) + H2O(g) + N2(g) =>
4 C2H5NH2(g) + 15 O2(g) = 8 CO2(g) + 14 H2O(g) + 2 N2(g)
Sn + P4 = Sn2P4 =>
2 Sn + P4 = Sn2P4
NH4Br + Pb(C2H3O2)2 = Br(C2H3O2) + Pb(NH4)2 =>
2 NH4Br + Pb(C2H3O2)2 = 2 Br(C2H3O2) + Pb(NH4)2
HNO3(aq) + NH4OH(aq) = NH4NO3(aq) + H2O(l) =>
HNO3(aq) + NH4OH(aq) = NH4NO3(aq) + H2O(l)
P4O10 + H2O = H3PO4 =>
P4O10 + 6 H2O = 4 H3PO4
OH{-} + CrI3 + Cl2 = CrO4{3+} + IO4{-} + Cl{-} + H2O =>
32 OH{-} + CrI3 + 16 Cl2 = CrO4{3+} + 3 IO4{-} + 32 Cl{-} + 16 H2O
TiO2 + SrCO3 + MoO2 = Sr2MoTiO6 + C + O =>
TiO2 + 2 SrCO3 + MoO2 = Sr2MoTiO6 + 2 C + 4 O
CaSO4 + Na2CO3 = CaCO3 + Na2SO4 =>
CaSO4 + Na2CO3 = CaCO3 + Na2SO4
Fe3O4 + H2SO4 = Fe2(SO4)3 + H2O + SO2 =>
2 Fe3O4 + 10 H2SO4 = 3 Fe2(SO4)3 + 10 H2O + SO2
Au + HI = H2 + AuI =>
2 Au + 2 HI = H2 + 2 AuI
(CH3COO)2Ca + NH4OH = CH3COONH4 + Ca(OH)2 =>
(CH3COO)2Ca + 2 NH4OH = 2 CH3COONH4 + Ca(OH)2
Cu(NO3)2 + K2S = CuS + K(NO3) =>
Cu(NO3)2 + K2S = CuS + 2 K(NO3)
CaOH = CaHO =>
CaOH = CaHO
Li + CuSO4 = Li2SO4 + Cu =>
2 Li + CuSO4 = Li2SO4 + Cu
Al + HCI = AlCI + H2 =>
2 Al + 2 HCI = 2 AlCI + H2
Au + HI = H2 + AuI =>
2 Au + 2 HI = H2 + 2 AuI
Be(NO3)2 + NaOH = Na2[Be(OH)4] + NaNO3 =>
Be(NO3)2 + 4 NaOH = Na2[Be(OH)4] + 2 NaNO3
C6H6 + O2 = CO2 + H2O =>
2 C6H6 + 15 O2 = 12 CO2 + 6 H2O
SO2 + P = P4O10 + S =>
5 SO2 + 4 P = P4O10 + 5 S
C6H6 + O2 = CO2 + H2O =>
2 C6H6 + 15 O2 = 12 CO2 + 6 H2O
KMnO4 + H2SO4 + K2S2O3 = K2SO4 + MnSO4 + H2O =>
8 KMnO4 + 7 H2SO4 + 5 K2S2O3 = 9 K2SO4 + 8 MnSO4 + 7 H2O
NH4{+} + (NH4)6Mo7O24*4H2O + H2S = (NH4)2MoS4 + H{+} + H2O =>
8 NH4{+} + (NH4)6Mo7O24*4H2O + 28 H2S = 7(NH4)2MoS4 + 8 H{+} + 28 H2O
Ba3(AsO4)2 + Ni = Ni3(AsO4)2 + Ba =>
Ba3(AsO4)2 + 3 Ni = Ni3(AsO4)2 + 3 Ba
Na2CO3 + SO2 + O2 = NaSO3 + CO2 =>
2 Na2CO3 + 4 SO2 + O2 = 4 NaSO3 + 2 CO2
NaOH + H2(SO4) = Na(SO4) + H2OH =>
NaOH + H2(SO4) = Na(SO4) + H2OH
C76H52O46 + O2 = CO2 + H2O =>
C76H52O46 + 66 O2 = 76 CO2 + 26 H2O
C6H5Br + NaOH = C6H5OH + NaBr =>
C6H5Br + NaOH = C6H5OH + NaBr
Sc + H2O = ScOH + H2 =>
2 Sc + 2 H2O = 2 ScOH + H2
K2SO4(aq) + Ba(NO3)2(aq) = KNO3(aq) + BaSO4 =>
K2SO4(aq) + Ba(NO3)2(aq) = 2 KNO3(aq) + BaSO4
KOH + Na2CrO4 + H2SO4 = K2Cr2O7 + Na2SO4 + H2O =>
2 KOH + 2 Na2CrO4 + 2 H2SO4 = K2Cr2O7 + 2 Na2SO4 + 3 H2O
Ra3(PO4)2 + Al2(CrO4)3 = RaCrO4 + AlPO4 =>
Ra3(PO4)2 + Al2(CrO4)3 = 3 RaCrO4 + 2 AlPO4
MnO2 + H{+} + NO2{-} = NO3{-} + Mn2{+} + H2 =>
4 MnO2 + 2 H{+} + 8 NO2{-} = 8 NO3{-} + 2 Mn2{+} + H2
PbCl4 = Pb + Cl2 =>
PbCl4 = Pb + 2 Cl2
CaCO3 + C4H6O4 = C4H4CaO4 + H2O + CO2 =>
CaCO3 + C4H6O4 = C4H4CaO4 + H2O + CO2
Ru + P = RuP =>
Ru + P = RuP
AgS + H{+} + NO3{-} = Ag(NO3)2 + H2S =>
AgS + 2 H{+} + 2 NO3{-} = Ag(NO3)2 + H2S
Cr(OH)2 + NaBr = CrBr2 + NaOH =>
Cr(OH)2 + 2 NaBr = CrBr2 + 2 NaOH
CaOH = CaHO =>
CaOH = CaHO
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