Q$3(25$ pt$)$ A boiler uses a distillate fuel oil of composition $C_9{H}_{16}{O}_2{N}_{0\mathrm{.}03}.$

Combustion occurs with $25\%$ excess air. Assume conversion of all fuel nitrogen to

$N{O}_2,$ and no thermal $N{O}_2$ forms. Calculate the $N{O}_2$ concentration $($in $ppm)$ in the

exhaust gas.