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The empirical formula of the compound becomes

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

Given values:

Mass of Ti = 0.72 g

Mass of Cl = 2.85 g

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

......(1)

To formulate the empirical formula, we need to follow some steps:

Molar mass of Ti = 47.9 g/mol

Molar mass of Cl = 35.6 g/mol

Putting values in equation 1, we get:

Calculating the mole fraction of each element by dividing the calculated moles by the least calculated number of moles that is 0.015 moles

The ratio of Ti : Cl = 1 : 5

Hence, the empirical formula of the compound becomes