In a laboratory experiment, a student found that a solution consisting of $53\mathrm{.}37$ g of an unknown compound $($a nonvolatile nonelectrolyte$)$ and $164\mathrm{.}9$ g of C$2$H$5$OH has a boiling point of $80\mathrm{.}71\backslash$deg C$.$ The normal boiling point of C$2$H$5$OH is $78\mathrm{.}50\backslash$deg C$.$ What is the molar mass of the compound? $($Kbp $=1\mathrm{.}22\backslash$deg C$/$m for C$2$H$5$OH$)$