Liquid hexane C$7$H$14$ reacts with gaseous oxygen gas O$2$ to produce gaseous carbon dioxide CO$2$ and gaseous water H$2$O$.$ If $5\mathrm{.}63$g of water is produced from the reaction of $7\mathrm{.}76$g of hexane and $18\mathrm{.}1$g of oxygen gas, calculate the percent yield of water.