Formulas of hydrates and compounds

Lead reacted with hydrochloric acid to form lead chloride and hydrogen gas. The following data was collected:
Initial mass of lead: 6.72 g
Final mass of lead chloride = 11.29 g
What is the formula of lead chloride as determined by formula?

11.29 g - 6.72 g = 4.57 g Cl

(6.72 g) / (207.2100 g Pb/mol) = 0.032431 mol Pb
(4.57 g Cl) / (35.4532 g Cl/mol) = 0.12890 mol Cl
Divide by the smaller number of moles:
(0.032431 mol Pb) / 0.032431 = 1.000
(0.12890 mol Cl) / 0.032431 = 3.974

Round to the nearest whole numbers to find the empirical formula:
PbCl4

There's no information here that would tell about a hydrate of lead chloride.