此烃的摩尔质量为
4.6g/(2.34L/22.4L/mol) = 44g/mol
CxHy + (x+y/4)O2 --- xCO2 + (y/2)H2O
根据此方程,x+y/4应该等于5
当x取值为1到5时,只有当x=3,y=8时满足题意
所以该烃分子式为C3H8