Question $2$

The surplus gasoline liquid stream from a catalytic reformer which is $20\%C_3{H}_8$ and $80\%C_4{H}_{10}$ is burned in a furnace in the presence of air. The composition of the gas leaving the furnace is

$\backslash$table$[[O_2,0\mathrm{.}073],[N_2,0\mathrm{.}836],[C{O}_2,0\mathrm{.}092],[CO,0\mathrm{.}0]]$

How much $O_2$ is required to burn $1$ mol of the gasoline stream under these conditions?