Answer:
Empirical formula for the given elements =

Step-by-step explanation:
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
Moles of aluminum = 0.0200 mol
Moles of chlorine = 0.0600 mol
For empirical formula , divide the smallest number of moles from each moles of element.
Aluminium =

Calcium =

Empirical formula for the given elements =
