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4 K(s) + 4 Cr(s) + 7 O2(g) = 2 K2Cr2O7(s)
C6H8O7(aq) + NaHCO3(s) = C6H5O7Na3(aq) + H2CO3(aq) =>
C6H8O7(aq) + 3 NaHCO3(s) = C6H5O7Na3(aq) + 3 H2CO3(aq)
Zn(OH)2 + H2O2 = ZnO(OH) + H2O =>
2 Zn(OH)2 + H2O2 = 2 ZnO(OH) + 2 H2O
C6H5COOH + O2 = CO2 + H2O =>
2 C6H5COOH + 15 O2 = 14 CO2 + 6 H2O
C9H8O4 + H2O = CH3COOH =>
2 C9H8O4 + 10 H2O = 9 CH3COOH
Ca3P2 + H2O = Ca(OH)2 + PH3 =>
Ca3P2 + 6 H2O = 3 Ca(OH)2 + 2 PH3
Zn + HCl = ZnCl2 + H2 =>
Zn + 2 HCl = ZnCl2 + H2
CH2ClCOOH + NaOH = CH2ClCOONa + H2O =>
CH2ClCOOH + NaOH = CH2ClCOONa + H2O
MgCl2 + H3PO4 = Mg3(PO4)2 + HCl =>
3 MgCl2 + 2 H3PO4 = Mg3(PO4)2 + 6 HCl
H2SO4 + KOH = K2SO4 + H2O =>
H2SO4 + 2 KOH = K2SO4 + 2 H2O
Mg2 + FeSO4 = MgSO4 + Fe =>
Mg2 + 2 FeSO4 = 2 MgSO4 + 2 Fe
KCl + Br2 = K + Br2Cl =>
KCl + Br2 = K + Br2Cl
P = P4 =>
4 P = P4
Cu{2} + I{-} = CuI + I2 =>
2 Cu{2} + 4 I{-} = 2 CuI + I2
O2 + Cu2S = CuO + S =>
O2 + Cu2S = 2 CuO + S
CuS + KCN + KOH = KCu(CN)2 + K2S + KCNO + H2O =>
2 CuS + 5 KCN + 2 KOH = 2 KCu(CN)2 + 2 K2S + KCNO + H2O
Br + AgNO3 = BrNO3 + Ag =>
Br + AgNO3 = BrNO3 + Ag
H2S + BrO3{-} + H{+} = S + Br2 + H2O =>
5 H2S + 2 BrO3{-} + 2 H{+} = 5 S + Br2 + 6 H2O
HCl(aq) + K2SO4(aq) = H2SO4(aq) + KCl(aq) =>
2 HCl(aq) + K2SO4(aq) = H2SO4(aq) + 2 KCl(aq)
C2H5NH2 + H2O = H3O + C2H5NH =>
C2H5NH2 + H2O = H3O + C2H5NH
CH3COO + NaHCO3 = CH3COONa + CO2 + H2O =>
8 CH3COO + 7 NaHCO3 = 7 CH3COONa + 9 CO2 + 5 H2O
MgSO4 + AgCl = MgCl2 + Ag2SO4 =>
MgSO4 + 2 AgCl = MgCl2 + Ag2SO4
Pb(C2H3O2)2 + KBr = PbBr2 + KC2H3O2 =>
Pb(C2H3O2)2 + 2 KBr = PbBr2 + 2 KC2H3O2
KNO3 + AgNO3 = AgK + NO3 =>
KNO3 + AgNO3 = AgK + 2 NO3
FeCl2 + K2CO3 = FeCO3 + K2Cl2 =>
FeCl2 + K2CO3 = FeCO3 + K2Cl2
CUSO4 + Ag = AgSO4 + CU =>
CUSO4 + Ag = AgSO4 + CU
Fe(s) + HC2H3O2(aq) = Fe(C2H3O2)3(aq) + H2(g) =>
2 Fe(s) + 6 HC2H3O2(aq) = 2 Fe(C2H3O2)3(aq) + 3 H2(g)
FeBr2(aq) + K2CO3(aq) = FeCO3(s) + KBr =>
FeBr2(aq) + K2CO3(aq) = FeCO3(s) + 2 KBr
FeH3 + H2O = Fe2O3 + H2 =>
2 FeH3 + 3 H2O = Fe2O3 + 6 H2
Au(ClO3)3 = Au + Cl2 + O2 =>
2 Au(ClO3)3 = 2 Au + 3 Cl2 + 9 O2
CaCl2 + (NH4)2HPO4 = Ca3(PO4)2 + NH4Cl + HCl =>
3 CaCl2 + 2(NH4)2HPO4 = Ca3(PO4)2 + 4 NH4Cl + 2 HCl
KBr + PbO2 + HNO3 = Pb(NO3)2 + Br2 + KNO3 + H2O =>
2 KBr + PbO2 + 4 HNO3 = Pb(NO3)2 + Br2 + 2 KNO3 + 2 H2O
CH4 + H2 = CH5 =>
2 CH4 + H2 = 2 CH5
CuSO3 + O2 = CuSO4 =>
2 CuSO3 + O2 = 2 CuSO4
Pb + Fe2(NO3)3 = Fe + Pb(NO3)2 =>
3 Pb + 2 Fe2(NO3)3 = 4 Fe + 3 Pb(NO3)2
Fe(OH)3 + H2SO4 = Fe(OH)SO4 + H2O =>
Fe(OH)3 + H2SO4 = Fe(OH)SO4 + 2 H2O
Mg + HCl = MgCl2 + H2 =>
Mg + 2 HCl = MgCl2 + H2
Cr2(SO4)3 + H2O = Cr2O3 + H2SO4 =>
Cr2(SO4)3 + 3 H2O = Cr2O3 + 3 H2SO4
CaOH2 + H3PO4 = CaH2 + PO4OH3 =>
CaOH2 + H3PO4 = CaH2 + PO4OH3
Fe(SO4) + H2O = Fe(OH)2 + H2SO4 =>
Fe(SO4) + 2 H2O = Fe(OH)2 + H2SO4
Al(NO3)3 + H2SO4 = Al2(SO4)3 + HNO3 =>
2 Al(NO3)3 + 3 H2SO4 = Al2(SO4)3 + 6 HNO3
CaCl2(aq) + AgNO3 = AgCl(s) + Ca(NO3)2(aq) =>
CaCl2(aq) + 2 AgNO3 = 2 AgCl(s) + Ca(NO3)2(aq)
Fe{2+} + Br{-} = FeBr2 =>
Fe{2+} + 2 Br{-} = FeBr2
Zn + HOH = ZnOHH =>
Zn + HOH = ZnOHH
BaSO4 + Br2 = BrSO4 + Ba =>
2 BaSO4 + Br2 = 2 BrSO4 + 2 Ba
Cl2 + Cu = CuCl2 =>
Cl2 + Cu = CuCl2
HClO2 + Ca(OH)2 = Ca(ClO2)2 + H2O =>
2 HClO2 + Ca(OH)2 = Ca(ClO2)2 + 2 H2O
Cr3{+} + ClO3{-} + H2O = Cr2O72{-} + ClO2{-} + H{+} =>
4 Cr3{+} + 427 ClO3{-} + 5 H2O = 6 Cr2O72{-} + 427 ClO2{-} + 10 H{+}
SrCO3 + ZrO2 = Sr3Zr2O7 + CO2 =>
3 SrCO3 + 2 ZrO2 = Sr3Zr2O7 + 3 CO2
Na + O2 = Na2O =>
4 Na + O2 = 2 Na2O
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