设有机物CxHyOz有amol,则
CxHyOz+(x+y/4-z)O2→xCO2+y/2H2O
ax ay/2
又CO2 --- CaCO3
1 100
ax 20
a=0.2/x
又石灰水质量变化关系:20-18×ay/2-44ax=5.8 x:y=1:3
即有机物为:(CH3)nOz,因此只能是C.设有机物CxHyOz有amol,则CxHyOz+(x+y/4-z/2)O2→xCO2+y/2H2Oax ay/2 又CO2 --- CaCO3 1 100 ax20a=0.2/x又石灰水质量变化:20-18×ay/2-44ax=20-18×(0.2/x)×y/2-44×(0.2/x)×x =20-1.8y /x-8.8 =5.8 y /x=3:1