Final answer:
The empirical formula can be computed from a knowledge of the percentage composition of a compound and atomic weights.
Step-by-step explanation:
The correct option is the Empirical formula. The empirical formula represents the simplest whole-number ratio of atoms in a compound.
It can be determined by knowing the percentage composition of the compound and the atomic weights of the elements involved, using molar masses to convert the mass of each element to a number of moles, and then calculating the whole-number ratios of the elements.
The empirical formula can then be used to calculate the molecular formula if the molar mass of the compound is known.