Hydrocarbons are organic compounds composed entirely of hydrogen and carbon. A 0. 1647 g sample of a pure hydrocarbon was burned in a combustion apparatus to produce 0. 4931 g of co2 and 0. 2691 g of water. Determine the empirical formula; enter as c#h#, so c1h1. Through another experiment it was determined that the molecular weight of this hydrocarbon is approximately 132 amu. What is the molecular formula of this compound? enter as c#h#, so c2h6.