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4 Al2O3 + 3 FeS = 8 Al + 3 FeSO4
Na2Se + HCl = NaCl + H2Se =>
Na2Se + 2 HCl = 2 NaCl + H2Se
CuSO4 + NH4OH = Cu(NH3)4SO4H2O + H2O =>
CuSO4 + 4 NH4OH = Cu(NH3)4SO4H2O + 3 H2O
C5H10O2 + O2 = CO2 + H2O =>
2 C5H10O2 + 13 O2 = 10 CO2 + 10 H2O
Na2CO3*10H2O + HNO3 = H2CO3 + H2O + NaNO3 =>
Na2CO3*10H2O + 2 HNO3 = H2CO3 + 10 H2O + 2 NaNO3
H3PO4 + Mn(OH)7 = Mn3(PO4)7 + H2O =>
7 H3PO4 + 3 Mn(OH)7 = Mn3(PO4)7 + 21 H2O
Al(s) + HCl = AlCl3(s) + H2(g) =>
2 Al(s) + 6 HCl = 2 AlCl3(s) + 3 H2(g)
C70H110O50N + H2O = CH4 + CO2 + NH3 =>
8 C70H110O50N + 146 H2O = 287 CH4 + 273 CO2 + 8 NH3
Na2CO3 + AlBr3 = AlCO3 + Na2Br3 =>
Na2CO3 + AlBr3 = AlCO3 + Na2Br3
P2O5 + H2O = H3PO4 =>
P2O5 + 3 H2O = 2 H3PO4
Hg + HNO3 + HCl = NO + HgCl2 + H2O =>
3 Hg + 2 HNO3 + 6 HCl = 2 NO + 3 HgCl2 + 4 H2O
I2 + I{-} = I3{-} =>
I2 + I{-} = I3{-}
C2H4 + H2SO4 = C2H5HSO4 =>
C2H4 + H2SO4 = C2H5HSO4
SiH4 + NH2 = Si2N4 + H2 =>
2 SiH4 + 4 NH2 = Si2N4 + 8 H2
FeS2 + H2O = FeS + H2S + SO2 =>
3 FeS2 + 2 H2O = 3 FeS + 2 H2S + SO2
Be(OH)2CuO = Cu(OH)2BeO =>
Be(OH)2CuO = Cu(OH)2BeO
NaOH + B2O3 = Na2B4O7 + H2O =>
2 NaOH + 2 B2O3 = Na2B4O7 + H2O
LiH(s) + H2O = H2(g) + LiOH(aq) =>
LiH(s) + H2O = H2(g) + LiOH(aq)
K3PO4 + H3PO4 = KHPO4 + H2 =>
2 K3PO4 + 4 H3PO4 = 6 KHPO4 + 3 H2
H2S + LiOH = Li2S + H2O =>
H2S + 2 LiOH = Li2S + 2 H2O
Li + H3PO4 = Li3PO4 + H3 =>
3 Li + H3PO4 = Li3PO4 + H3
Na2CO3 + H2SO4 = Na2SO4 + CO2 + H2O =>
Na2CO3 + H2SO4 = Na2SO4 + CO2 + H2O
H2S + MgO = H2O + MgS =>
H2S + MgO = H2O + MgS
KOH + AgNO3 = Ag(OH) + KNO3 =>
KOH + AgNO3 = Ag(OH) + KNO3
Ca(NO3)2(aq) + NaI(aq) = CaI2 + NaNO3 =>
Ca(NO3)2(aq) + 2 NaI(aq) = CaI2 + 2 NaNO3
MnO + O2 = MnO2 =>
2 MnO + O2 = 2 MnO2
Be(OH)2 + NaOH = Na4BeO3 + H2O =>
Be(OH)2 + 4 NaOH = Na4BeO3 + 3 H2O
Cu + HNO3 = Cu(NO3)2 + NO + H2O =>
3 Cu + 8 HNO3 = 3 Cu(NO3)2 + 2 NO + 4 H2O
ZnSO4(aq) + Sr(OH)2(aq) = Zn(OH)2(aq) + SrSO4(s) =>
ZnSO4(aq) + Sr(OH)2(aq) = Zn(OH)2(aq) + SrSO4(s)
CO2 + H2 = CH3OH + H2O =>
CO2 + 3 H2 = CH3OH + H2O
Fe(OH)2*H2O + HNo3 = Fe(No3)2 + H2O =>
Fe(OH)2*H2O + 2 HNo3 = Fe(No3)2 + 3 H2O
Cu2S = Cu + S4 =>
4 Cu2S = 8 Cu + S4
Ba(HSO4) + NaOH + O2 = Ba(OH)2 + Na2SO4 + H2O =>
4 Ba(HSO4) + 8 NaOH + O2 = 4 Ba(OH)2 + 4 Na2SO4 + 2 H2O
CH3COO + C2H5OH = CH3COOC2H5 + H2O =>
4 CH3COO + 6 C2H5OH = 5 CH3COOC2H5 + 4 H2O
Si + H2S = SiS2 + H2 =>
Si + 2 H2S = SiS2 + 2 H2
Mg + AgNO3 = Mg(NO3)2 + Ag =>
Mg + 2 AgNO3 = Mg(NO3)2 + 2 Ag
CH3Cl + C2H5ONa = NaCl + CH3OC2H5 =>
CH3Cl + C2H5ONa = NaCl + CH3OC2H5
S3Sb2 + HCl = SbCl3 + H2S =>
S3Sb2 + 6 HCl = 2 SbCl3 + 3 H2S
KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2 =>
2 KMnO4 + 16 HCl = 2 KCl + 2 MnCl2 + 8 H2O + 5 Cl2
Na2SO4 + Ba = Na + BaSO4 =>
Na2SO4 + Ba = 2 Na + BaSO4
FeCl3 + HCl + K2[Fe(CN)6] = Fe[Fe(CN)6]3 + KCl + H2 =>
2 FeCl3 + 6 HCl + 6 K2[Fe(CN)6] = 2 Fe[Fe(CN)6]3 + 12 KCl + 3 H2
SnCl2 + K2Cr2O7 + H2SO4 = SnCl4 + Sn(SO4)2 + Cr2(SO4)3 + K2SO4 + H2O =>
6 SnCl2 + 2 K2Cr2O7 + 14 H2SO4 = 3 SnCl4 + 3 Sn(SO4)2 + 2 Cr2(SO4)3 + 2 K2SO4 + 14 H2O
KBr + NH3 = K2 + NH3Br =>
2 KBr + 2 NH3 = K2 + 2 NH3Br
H3AsO4 + Ca(OH)2 = Ca3(AsO4)2 + H2O =>
2 H3AsO4 + 3 Ca(OH)2 = Ca3(AsO4)2 + 6 H2O
NH4SCN + CuSO4*5H2O = NH4SO4 + CuSCN + H2O =>
NH4SCN + CuSO4*5H2O = NH4SO4 + CuSCN + 5 H2O
FeSO4 + KMnO4 + H2SO4 = Fe2(SO4)3 + MnSO4 + K2SO4 + H2O =>
10 FeSO4 + 2 KMnO4 + 8 H2SO4 = 5 Fe2(SO4)3 + 2 MnSO4 + K2SO4 + 8 H2O
Al2(SiO3)3 + H2SO4 = H2SiO3 + Al2(SO4)3 =>
Al2(SiO3)3 + 3 H2SO4 = 3 H2SiO3 + Al2(SO4)3
(b)C8H18(l) + O2(g) = CO2(g) + H2O(l) =>
2(b)C8H18(l) + 25 O2(g) = 16 CO2(g) + 18 H2O(l)
Ca(OH)2(aq) + AgNO3(aq) = AgOH(s) + Ca(NO3)2(aq) =>
Ca(OH)2(aq) + 2 AgNO3(aq) = 2 AgOH(s) + Ca(NO3)2(aq)
[Co(NH3)4](OH)2 + Na2S + H2O = CoS + NaOH + NH4OH =>
[Co(NH3)4](OH)2 + Na2S + 4 H2O = CoS + 2 NaOH + 4 NH4OH
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