在常温常压下,将20 ml 3种气态烃的混合物与120ml氧气混合,点燃后恢复到原状态,得到90ml气体,则此三种气态烃可能是

问题描述:

在常温常压下,将20 ml 3种气态烃的混合物与120ml氧气混合,点燃后恢复到原状态,得到90ml气体,则此三种气态烃可能是
A C2H6 C3H6 C4H8
B C2H6 C3H6 C4H6
C C2H6 C3H8 CH4
D C2H2 C2H4 C3H4

差量法:CxHy+(x+y/4)O2→xCO2+(y/2)H2O(水是液体,不算体积)1``````````````````````````````````物质的量质量减小=1+x+y/4-x=1+y/420···························140-901/20=(1+y/...