User A purified liquid compound derived from turpentine is introduced into a syringe by injection through the rubber tip using a hypodermic needle. the mass of the injected liquid is .0105 g. the syringe is then transferred to a temperature bath heated to 125.00 degrees c. and the liquid vaporizes causing the syringe plunger to expand to a volume of 2.25 ml. the external atmospheric pressure is 650 mm Hg. what is the molar mass, in grams, of this compound under identical conditions, compared to oxygen gas, how many times faster does helium gas effuse?