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HgO + O2 = HgO3
Pb + AgNO3 = Pb(NO3)2 + Ag =>
Pb + 2 AgNO3 = Pb(NO3)2 + 2 Ag
P4(s) + Br2(l) = PBr3(s) =>
P4(s) + 6 Br2(l) = 4 PBr3(s)
MgO + P2O5 = Mg3(PO4)2 =>
3 MgO + P2O5 = Mg3(PO4)2
Fe + Hg(No3)2 = Fe(No3)2 + Hg =>
Fe + Hg(No3)2 = Fe(No3)2 + Hg
methane + chlorine = chloromethane + HCl =>
CH4 + Cl2 = CH3Cl + HCl
K2S + KMnO4 + H2O = KOH + S + MnO2 =>
3 K2S + 2 KMnO4 + 4 H2O = 8 KOH + 3 S + 2 MnO2
C3H5CO2H + O2 = CO2 + H2O =>
2 C3H5CO2H + 9 O2 = 8 CO2 + 6 H2O
NaOH + Zn + H2O + KNO3 = K2Zn(OH)4 + NH3 + Na2Zn(OH)4 =>
14 NaOH + 8 Zn + 12 H2O + 2 KNO3 = K2Zn(OH)4 + 2 NH3 + 7 Na2Zn(OH)4