An unknown hydrocarbon is subjected to elemental analysis. The results of this test show that the compound is 83.24% carbon and 16.76% H. With a molar mass of 72 g/mole, the molecular formula of this compound is:

Question

Quizplus · Accepted Answer

The empirical formula is CH2, and the molar mass of the empirical formula is 14 g/mol. The molecular formula is a multiple of the empirical formula, and 72/14 = 5.14, which is approximately 5. Therefore, the molecular formula is C5H12.

An Unknown Hydrocarbon Is Subjected to Elemental Analysis