Question

the compound fecl₃ is made of
three molecules of iron chloride.
one atom of iron and three atoms of carbon.
one atom of iron and three atoms of chlorine.
two atoms of iodine, one atom of iron, and one atom of carbon.

Explanation:

Step1: Analyze compound formula

The formula $\text{FeCl}_3$ indicates one iron (Fe) atom and three chlorine (Cl) atoms.

Step2: Evaluate options

A is wrong as it's not three molecules. B has wrong elements (carbon instead of chlorine). D has wrong elements (iodine and carbon). So C is correct.

Answer:

C. one atom of iron and three atoms of chlorine.