Answer:
The chemical formula of that compund is FeF3
Step-by-step explanation:
This compound is known as a ferrec flouride, Anhydrous iron(III) fluoride is white, whereas the hydrated forms are light pink.
It is a non ferromagnetic solid consisting of high spin Fe(III) centers, which explains the pale colors of the differents forms of this material.
Anhydrous iron(III) fluoride is generally prepared by treating any anhydrous iron compound with fluorine.
For example:
FeCl3 + 3 HF → FeF3 + 3 HCl.