摘要:23.O2 Al N2
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①______Al+______HCl═______AlCl3+______H2
②______Al+______Fe3O4═______Fe+______Al2O3
③______ N2+______H2═______NH3
④______C2H2+______O2═______H2O+______CO2.
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①______Al+______HCl═______AlCl3+______H2
②______Al+______Fe3O4═______Fe+______Al2O3
③______ N2+______H2═______NH3
④______C2H2+______O2═______H2O+______CO2.