1. Convert Grams to Moles

* Iron (Fe): 55.85 g Fe / 55.845 g/mol Fe = 1.000 mol Fe

* Chlorine (Cl): 106.5 g Cl / 35.45 g/mol Cl = 3.000 mol Cl

2. Find the Mole Ratio

* Divide the number of moles of each element by the smallest number of moles (which is 1.000 mol in this case):

* Fe: 1.000 mol / 1.000 mol = 1

* Cl: 3.000 mol / 1.000 mol = 3

3. Write the Empirical Formula

* The mole ratio tells us that the empirical formula is FeCl₃.

Therefore, the empirical formula for iron chloride with these proportions is FeCl₃.