Chemistry - Concentration Terms Question with Solution | TestHub

An ideal gaseous mixture of ethane $\left({\mathrm{C}}_2{\mathrm{H}}_6\right)$ and ethene $\left({\mathrm{C}}_2{\mathrm{H}}_4\right)$ occupies 28 litre at 1 atm and $273\mathrm{K}$. The mixture reacts completely with $128\mathrm{g}$ ${\mathrm{O}}_2$ to produce ${\mathrm{CO}}_2$ and ${\mathrm{H}}_2\mathrm{O}.$ Mole fraction at ${\mathrm{C}}_2{\mathrm{H}}_6$ in the mixture is: