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最佳答案:设CxHyCxHy + (y/2+2x)O2 → (y/2)H2O + xCO2xCO2 = 9.9 gM(CO2)=44g/moln(CO2)=9.9/44=
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最佳答案:C+O2高温=CO24P+5O2=2P2O5S+O2=SO26Fe+4O2=2Fe3O42Mg+O2=2MgO2Cu+O2=2CuOCH4+2O2==CO2+2