Determination of Molecular Formula

Step 1

Determine the number of empirical formula units in the compound.

(Molar mass of the compound)/Empirical formula mass of C₄H₉
= 114.0 g / 57.0 g

= 2 empirical formula units

Step 2

Determine the molecular formula.

(Empirical formula)	x	(Number of empirical formula units)	= Molecular formula
C₄H₉	x	2	= C₈H₁₈

The molecular formula is C₈H₁₈