The equation for the combustion of methane: CH4[g] + 2O2[g] → CO2[g] + 2H2O[l] Methane + Oxygen → Carbon Dioxide + Water The synthesis equation of aluminum oxide: 4Al[s] + 3O2[g] → Al2O3[s] Aluminum + Oxygen → Aluminum Oxide The decomposition equation of potassium chlorate: 2KClO3[s] → 2KCl[s] + 3O2[g] Potassium Chlorate → Potassium Chloride + Oxygen The replacement equation with magnesium and hydrogen chloride: Mg[s] + 2HCl[aq] → MgCl2[aq] + H2[g] Magnesium + Hydrogen Chloride → Magnesium Chloride + Hydrogen The ionic reaction equation of sodium chloride and silver nitrate: NaCl[aq] + AgNO3[aq] → NaNO3[aq] + AgCl[s] Sodium Chloride + Silver Nitrate → Sodium Nitrate + Silver Chloride