Ethanol, $C_2{H}_{6}O,$ is most often blended with gasoline $-$ usually as a $10$ percent $m|x|-$ to create a fuel called gasohol. Ethanol is a renewable resource and ethanol$-$blended fuels, Ilike gasohol, appear to burn more efficiently in combustion engines. The combustion of one mole of ethanol releases $326\mathrm{.}7$kcal of energy.

The combustion of one mole of octane, $C_8{H}_{18},$ releases $1\mathrm{.}308{10}^3$kcal of energy. How much energy is released during the complete combustion of $475$ grams of octane?

kcal

Assuming the same efficiency, would $475$ grams of ethanol provide more, less, or the same amount of energy as $475$ grams of octane?