首先是甲烷
CH4+2O2===2H2O+CO2
16 64
100g X
16X=6400g
X= 400g
400g/1.429g/L=279.92L(约数)
其次是酒精
C2H5OH＋3O2=2CO2＋3H2O
46 96
100g Y
46Y=9600g
Y=208.70g(约数)
208.70g/1.429g/L=146.05L(约数)
大概是这样吧,有错误请见谅~