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Numerade Educator



Problem 107 Hard Difficulty

One of the compounds used to increase the octane rating of gasoline is toluene (right). Suppose 20.0 $\mathrm{mL}$ of toluene $(d=$ 0.867 $\mathrm{g} / \mathrm{mL}$ ) is consumed when a sample of gasoline burns in air.
(a) How many grams of oxygen are needed for complete combustion of the toluene? (b) How many total moles of gaseous products form? (c) How many molecules of water vapor form?


$\mathrm{m}\left(\mathrm{O}_{2}\right)=54,24 \mathrm{g}$
$\mathrm{n}($ total $)=\mathrm{n}\left(\mathrm{CO}_{2}\right)+\mathrm{n}\left(\mathrm{H}_{2} \mathrm{O}\right)=2,068 \mathrm{mol}$
$\mathrm{N}\left(\mathrm{H}_{2} \mathrm{O}\right)=4,53^{*} 10^{23} \mathrm{molecules}$


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Video Transcript

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