Can anyone help with this chemistry problem?

Please show me all your steps! The following procedure is a simple though somewhat crude way to measure the molar m of a gas. A liquid of m .0184 g is introduced into a syringe like the one shown here by injection through the rubber tip using a hypodermic needle. The syringe is then transferred to a temperature bath heated to 45degrees C and the liquid vaporizes. The final volume of the vapor (measured by the outward movement of the plunger) is 5.58mL and the atmospheric pressure is 760mm Hg. Given that the compound's empirical formula is CHsubscript 2. Deteremnee the molar m of the compound. Thanks!!!