Octane is a principle component of gasoline. The empirical formula of octane is C₄H₉, and the molar mass of octane is 114.26 grams per mole. What is the molecular formula of octane?

Question

Quizplus · Accepted Answer

The empirical formula mass of C4H9 is 57.13 g/mol. The molecular formula is a multiple of the empirical formula. 114.26 g/mol divided by 57.13 g/mol is approximately 2, so the molecular formula is C8H18.

Octane Is a Principle Component of Gasoline