Let the mixture contains a,b, and c mL of C3H8,CH4 and CO respectively, then
a+b+c=100...(i)
Also, a=36.5...(ii)
The combustion reactions are:
C3H8+5O2→3CO2+4H2O
CH4+2O2→CO2+2H2O
CO+12O2→CO2
∴CO2 formed as a combustion of mixture
=3a+b+c(seevolumeormoleratio)
=3×36.5+(b+c)
=3×36.5+(100−36.5)=173mL