1 C4H10+6.5 O2, O2在空气中约占1/5,所以1:6.5*5
M(O2):M(空气)=29:125416/(29/125)=841:13000
841:130002C4H10+13O2=8CO2+10H2O116 416116g 416gM(O2):M(空气)=29:125416/(29/125)=841:13000