动二：配平下列化学方程式（1）___H2___O2___H2O（2）___N2___H2___NH3（3）___NH3___Cl2___N2___HCl（4）___H2S___O2___S___H2O（5）___C2H2___O2___H2O___CO2总结配平技巧：____________________________________________________________________________________________【课堂演练】配平下列化学方程式（1）___Fe___H2O___Fe3O4___H2（2）_NH3_O2NOH2O（3）_KClO3KClO24____H2OCCOH2（5）___Al___Fe3O4___Fe___Al2O3（6）___Fe2O3___H2SO4___Fe2SO43___H2O（7）___Al___H2SO4___Al2SO43___H2（8）___CH3OH___O2教学反思___CO2___H2O
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