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4 Al2O3 + 9 Fe = 3 Fe3O4 + 8 Al
Cr(OH)3 + Na2SO4 = Cr2(SO4)3 + NaOH =>
2 Cr(OH)3 + 3 Na2SO4 = Cr2(SO4)3 + 6 NaOH
Kr2Cr2O7 + HCl = KrCl + CrCl3 + H2O + Cl2 =>
Kr2Cr2O7 + 14 HCl = 2 KrCl + 2 CrCl3 + 7 H2O + 3 Cl2
HgO(s) = Hg(l) + O2(g) =>
2 HgO(s) = 2 Hg(l) + O2(g)
H2S + FeCe3 = FeCe2 + S + HCe =>
H2S + 2 FeCe3 = 2 FeCe2 + S + 2 HCe
Na2CO3 + CuBr = NaBr() + Cu2CO3() =>
Na2CO3 + 2 CuBr = 2 NaBr() + Cu2CO3()
NH3(g)CO2(g)H2O(g) = NH4HCO3 =>
NH3(g)CO2(g)H2O(g) = NH4HCO3
KOH + SO3 = H2O + K2SO4 =>
2 KOH + SO3 = H2O + K2SO4
Fe + Cl2 = FeCl3 =>
2 Fe + 3 Cl2 = 2 FeCl3
H60 = H7 =>
7 H60 = 60 H7
Na2SO3 + H2SO4 = H2O + Na2SO4 + SO2 =>
Na2SO3 + H2SO4 = H2O + Na2SO4 + SO2
Na2CO3 + HCl = NaCl + (H2CO3) = CO2 + H2O =>
Na2CO3 + 2 HCl = 2 NaCl + (H2CO3)
Sb2S3 + O2 = Sb2O3 + SO2 =>
2 Sb2S3 + 9 O2 = 2 Sb2O3 + 6 SO2
CoSe + HClO3 = CoO4Se + H2O + ClO2 =>
CoSe + 8 HClO3 = CoO4Se + 4 H2O + 8 ClO2
(C6H10O2)(s) + O2(g) = CO2(g) + H2O(l) =>
2(C6H10O2)(s) + 15 O2(g) = 12 CO2(g) + 10 H2O(l)
H + Se4 = H2Se =>
8 H + Se4 = 4 H2Se
CO2H5(NO3)3 = CO2 + N2 + H2O + O2 =>
4 CO2H5(NO3)3 = 4 CO2 + 6 N2 + 10 H2O + 13 O2
Rb + S = Rb2S =>
2 Rb + S = Rb2S
Fe2(SO4)3 + KOH = K2SO4 + Fe(OH)3 =>
Fe2(SO4)3 + 6 KOH = 3 K2SO4 + 2 Fe(OH)3
Ca(OH)2 + CO2 = Ca(HCO3)2 =>
Ca(OH)2 + 2 CO2 = Ca(HCO3)2
NH3(g) + O2(g) = H2O() + N2(g) =>
4 NH3(g) + 3 O2(g) = 6 H2O() + 2 N2(g)
Cr2O3 + KClO + KOH = K2CrO4 + H2O + KCl =>
Cr2O3 + 3 KClO + 4 KOH = 2 K2CrO4 + 2 H2O + 3 KCl
Pb(CH3CO)2 + Na2CO3 = Na2(CH3CO)2 + PbCO3 =>
Pb(CH3CO)2 + Na2CO3 = Na2(CH3CO)2 + PbCO3
(C2H5)Zn + O2 = ZnO + CO2 + H2O =>
4(C2H5)Zn + 15 O2 = 4 ZnO + 8 CO2 + 10 H2O
H2CO3NH3 = NH4HCO3 =>
H2CO3NH3 = NH4HCO3
NH4Cl + NaOH = NH3 + H2O + NaCl = =>
NH4Cl + NaOH = NH3 + H2O + NaCl
H2O2 = H2O + O2 =>
2 H2O2 = 2 H2O + O2
Cu3(PO4)2 + Na2SO4 = Na3PO4 + CuSO4 =>
Cu3(PO4)2 + 3 Na2SO4 = 2 Na3PO4 + 3 CuSO4
Na + ZnI2 = NaI + Zn =>
2 Na + ZnI2 = 2 NaI + Zn
H2O = H2 + O2 =>
2 H2O = 2 H2 + O2
KBr + Cl2 = KCl + Br2 =>
2 KBr + Cl2 = 2 KCl + Br2
AgNO3 + NH4OH = Ag(NH3)2NO3 + H2O =>
AgNO3 + 2 NH4OH = Ag(NH3)2NO3 + 2 H2O
CH3CH2CH3 + O2 = CO2 + H2O =>
CH3CH2CH3 + 5 O2 = 3 CO2 + 4 H2O
PbN6 + CrMn2O8 = Pb3O4 + Cr2O3 + MnO2 + N0 =>
15 PbN6 + 8 CrMn2O8 = 5 Pb3O4 + 4 Cr2O3 + 16 MnO2 + 90 N0
Ca2(PO4)2 + H2(SO4) = Ca(SO4) + H2(PO4) =>
Ca2(PO4)2 + 2 H2(SO4) = 2 Ca(SO4) + 2 H2(PO4)
Cs(s) + HOH(l) = H2(g) + CsOH(aq) =>
2 Cs(s) + 2 HOH(l) = H2(g) + 2 CsOH(aq)
KClO3 = KCl + O2 =>
2 KClO3 = 2 KCl + 3 O2
Rb + S = Rb2S3 =>
2 Rb + 3 S = Rb2S3
PO4 + Ni = Ni3PO4 =>
PO4 + 3 Ni = Ni3PO4
CH3OH + K2Cr2O7 + HCl = HCOOH + CrCl3 + H2O + KCl =>
3 CH3OH + 2 K2Cr2O7 + 16 HCl = 3 HCOOH + 4 CrCl3 + 11 H2O + 4 KCl
CH3(CH2)6CH3 + O2 = CO2 + H2O =>
2 CH3(CH2)6CH3 + 25 O2 = 16 CO2 + 18 H2O
H2S + CsOH = Cs2S + H2O =>
H2S + 2 CsOH = Cs2S + 2 H2O
C2(g) + H2(g) + O2(g) = CH2O(g) =>
C2(g) + 2 H2(g) + O2(g) = 2 CH2O(g)
H2SO4 + Zn = H2 + ZnSO4 =>
H2SO4 + Zn = H2 + ZnSO4
K2MnO4 + H2SO4 + Zn = ZnSO4 + MnSO4 + KSO4 + H2O =>
K2MnO4 + 4 H2SO4 + Zn = ZnSO4 + MnSO4 + 2 KSO4 + 4 H2O
Cr(s) + O3(g) = Cr2O3(s) =>
2 Cr(s) + O3(g) = Cr2O3(s)
Cu(OH)2 + C2H4O2 = Cu(CH3COO)2 + H2O =>
Cu(OH)2 + 2 C2H4O2 = Cu(CH3COO)2 + 2 H2O
NaBH4 + C8H8O + H2O = C8H10O + NaB(OH)4 =>
NaBH4 + 4 C8H8O + 4 H2O = 4 C8H10O + NaB(OH)4
C6H12O6(s) + O2(G) = CO2(G) + H2O(g) =>
C6H12O6(s) + 6 O2(G) = 6 CO2(G) + 6 H2O(g)
Cu(Br)2 + KOH = Cu(OH)2 + KBr =>
Cu(Br)2 + 2 KOH = Cu(OH)2 + 2 KBr
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