The empirical formula represents the simplest whole-number ratio of atoms in a compound. To find the empirical formula, you need to divide the subscripts in the molecular formula by their greatest common factor.

Here's how it works for hexane (C5H14):

1. Find the greatest common factor (GCF): The GCF of 5 and 14 is 1.

2. Divide the subscripts by the GCF: Since the GCF is 1, the subscripts remain the same.

Therefore, the empirical formula of hexane (C5H14) is C5H14.

Important Note: Hexane's molecular formula is already the simplest whole-number ratio, so its empirical formula is the same.