A gaseous hydrocarbon, in a volume of $29\mathrm{.}4$ L at $395$ K and a pressure of $3\mathrm{.}53$ atm, reacts in an excess of oxygen to give $114\mathrm{.}2$ g of H$2$O and $141\mathrm{.}6$ g of CO$2.$ Determine the molecular formula of the hydrocarbon.