等质量的有机物1 C15H32 2 C20H40 3 C12H36 4 C30H58 5 C22H42 燃烧后耗O2的量从大到小的顺序为?

问题描述:

等质量的有机物1 C15H32 2 C20H40 3 C12H36 4 C30H58 5 C22H42 燃烧后耗O2的量从大到小的顺序为?
答案31245 谁演算下

因为是等质量的有机物燃烧,不能用烃燃烧通式.所以要比较y/x
1:32/15=2.1333
2:40/20=2
3:36/12=3
4:58/30=1.9333
5:42/22=1.909