甲烷耗氧多.
CH4+2O2=点燃=CO2+2H2O
16 64
4.6g x
16/4.6=64/x
x=18.4g
C2H5OH+3O2=点燃=2CO2+3H2O
46 96
4.6g y
46/4.6=96/y
y=9.6g
所以甲烷耗氧多.