设该物质为CXHY
M=12X+Y
n=1.4/(12X+Y)
则生成二氧化碳的物质的量为1.4X /(12X+Y)
[1.4X /(12X+Y)]*44=4.4
Y=2X
M=1.25*22.4=28
该物质为CXH2X
12X+2X=28
X=2
则该物质为C2H4,乙烯
设该物质为CXHY
M=12X+Y
n=1.4/(12X+Y)
则生成二氧化碳的物质的量为1.4X /(12X+Y)
[1.4X /(12X+Y)]*44=4.4
Y=2X
M=1.25*22.4=28
该物质为CXH2X
12X+2X=28
X=2
则该物质为C2H4,乙烯