Na + O2 = Na2O => 4 Na + O2 = 2 Na2O

CaI2 + K3PO4 = Ca3(PO4)2 + IK => 3 CaI2 + 2 K3PO4 = Ca3(PO4)2 + 6 IK

Zn(s) + FeCl2(aq) = ZnCl2(aq) + Fe(s) => Zn(s) + FeCl2(aq) = ZnCl2(aq) + Fe(s)

C4H10 + O2 = H2O + CO2 => 2 C4H10 + 13 O2 = 10 H2O + 8 CO2

Na + HCl = H2 + NaCl => 2 Na + 2 HCl = H2 + 2 NaCl

KI + NaCl = KCl + NaI => KI + NaCl = KCl + NaI

C2H4 + O2 = CO2 + H20 => 5 C2H4 + 10 O2 = 10 CO2 + H20

K + Cl2 = KCl => 2 K + Cl2 = 2 KCl

Na + H2O = NaOH + H2 => 2 Na + 2 H2O = 2 NaOH + H2

KI + K2SO4 = KSO4 + K2I => KI + K2SO4 = KSO4 + K2I

Cl2 + SO2 + H2O = HCl + H2SO4 => Cl2 + SO2 + 2 H2O = 2 HCl + H2SO4

Br2 + H2O + SO2 = HBr + H2SO4 => Br2 + 2 H2O + SO2 = 2 HBr + H2SO4

Cr2(SO3)3(aq) + H2SO4(aq) = Cr2SO4 + H2(SO3)3 => Cr2(SO3)3(aq) + H2SO4(aq) = Cr2SO4 + H2(SO3)3

Al(s) + ZnCl2(l) = AlCl3(s) + Zn(s) => 2 Al(s) + 3 ZnCl2(l) = 2 AlCl3(s) + 3 Zn(s)

C2H6 + O2 = CO2 + H2O => 2 C2H6 + 7 O2 = 4 CO2 + 6 H2O

KI + K2SO4 = KSO4 + K2I => KI + K2SO4 = KSO4 + K2I

LiCl + NaOH = LiOH + NaCl => LiCl + NaOH = LiOH + NaCl

KMnO4 + NaCl + H2SO4 = Cl2 + MnSO4 + K2SO4 + Na2SO4 + H2O => 2 KMnO4 + 10 NaCl + 8 H2SO4 = 5 Cl2 + 2 MnSO4 + K2SO4 + 5 Na2SO4 + 8 H2O

Y(NO3)3*6H2O + Ba(NO3)2 + Cu(NO3)*3H2O = YBa2Cu3O7 + H2O + NO2 + O2 => 2 Y(NO3)3*6H2O + 4 Ba(NO3)2 + 6 Cu(NO3)*3H2O = 2 YBa2Cu3O7 + 30 H2O + 20 NO2 + 3 O2

K2MnO4 + NaCl + H2SO4 = Cl2 + MnSO4 + K2SO4 + Na2SO4 + H2O => K2MnO4 + 4 NaCl + 4 H2SO4 = 2 Cl2 + MnSO4 + K2SO4 + 2 Na2SO4 + 4 H2O

Cu(s) + HgCl2(aq) = Hg + CuCl2(aq) => Cu(s) + HgCl2(aq) = Hg + CuCl2(aq)

Mg(OH)2 + HCl = MgCl2 + H2O => Mg(OH)2 + 2 HCl = MgCl2 + 2 H2O

LiCl + NaCO3 = LiCO3 + NaCl => LiCl + NaCO3 = LiCO3 + NaCl

BaCl2 + HSO4 = BaSO4 + HCl2 => BaCl2 + HSO4 = BaSO4 + HCl2

Al(s) + HCl(aq) = AlCl3(aq) + H2(g) => 2 Al(s) + 6 HCl(aq) = 2 AlCl3(aq) + 3 H2(g)

NaOH + H2SO4 = Na2SO4 + H2O => 2 NaOH + H2SO4 = Na2SO4 + 2 H2O

BaCl2 + Na2SO4 = BaSO4 + NaCl =>

BaCl2 + Na2SO4 = BaSO4 + 2 NaCl

N2H3(CH3) + N2O4 = CO2 + H2O + N2 => 4 N2H3(CH3) + 5 N2O4 = 4 CO2 + 12 H2O + 9 N2

Al + O2 = Al2O3 => 4 Al + 3 O2 = 2 Al2O3

N2H4 + N2O4 = H2O + N => 2 N2H4 + N2O4 = 4 H2O + 6 N

Fe + H2SO4 = Fe2(SO4)3 + H2 => 2 Fe + 3 H2SO4 = Fe2(SO4)3 + 3 H2

Ca(NO3)2 + KF = CaF2 + KNO3 => Ca(NO3)2 + 2 KF = CaF2 + 2 KNO3

Mg3N2 + H2O = MgO + NH3 => Mg3N2 + 3 H2O = 3 MgO + 2 NH3

Ca(ClO3)2 = CaCl2 + O2 => Ca(ClO3)2 = CaCl2 + 3 O2

Ca(OH)2 + H2SO4 = CaSO4 + H2O => Ca(OH)2 + H2SO4 = CaSO4 + 2 H2O

(NH4)2SO4 + KOH = NH3 + H2O + K2SO4 => (NH4)2SO4 + 2 KOH = 2 NH3 + 2 H2O + K2SO4

MgBr2 + NaOH = Mg(OH)2 + NaBr => MgBr2 + 2 NaOH = Mg(OH)2 + 2 NaBr

CuCl2 + H2S = CuS + HCl => CuCl2 + H2S = CuS + 2 HCl

Al + H2SO4 = Al2(SO4)3 + H2 => 2 Al + 3 H2SO4 = Al2(SO4)3 + 3 H2

AgNO3(aq) + NaCl(aq) = AgCl + NaNO3 => AgNO3(aq) + NaCl(aq) = AgCl + NaNO3

K + O2 = K2O => 4 K + O2 = 2 K2O

Na3PO4(aq) + AgNO3(aq) = Ag3PO4(s) + NaNO3(aq) => Na3PO4(aq) + 3 AgNO3(aq) = Ag3PO4(s) + 3 NaNO3(aq)

P4 + Cl2 = PCl5 => P4 + 10 Cl2 = 4 PCl5

Na3PO4 + AgNO3 = Ag3PO4 + NaNO3 => Na3PO4 + 3 AgNO3 = Ag3PO4 + 3 NaNO3

NH4Cl + Ba(OH)2 = NH3 + H2O + BaCl2 => 2 NH4Cl + Ba(OH)2 = 2 NH3 + 2 H2O + BaCl2

NH4NO3(aq) + Mg3(PO4)2(aq) = Mg(NO3)2(aq) + NH3(g) + H3PO4(aq) => 6 NH4NO3(aq) + Mg3(PO4)2(aq) = 3 Mg(NO3)2(aq) + 6 NH3(g) + 2 H3PO4(aq)

C8H18 + O2 = CO2 + H2O => 2 C8H18 + 25 O2 = 16 CO2 + 18 H2O

Cu + S8 = CuS => 8 Cu + S8 = 8 CuS

Ca3(PO4)2 + SiO2 = P4O10 + CaSiO3 => 2 Ca3(PO4)2 + 6 SiO2 = P4O10 + 6 CaSiO3

Fe + O2 = Fe2O3 => 4 Fe + 3 O2 = 2 Fe2O3