The Fully Hydrated Form of Sodium Sulfate Is the Decahydrate $\underline{\text{ per formula unit }}$

Multiple Choice

The fully hydrated form of sodium sulfate is the decahydrate, Na₂SO₄. 10H₂O.This compound dehydrates (loses some waters of hydration) when heated.A sample of partially dehydrated sodium sulfate was found to have a molar mass of 232.1 g/mol.How many water molecules are found $\underline{\text{ per formula unit }}$ in in this sample? (i.e.determine n in Na₂SO₄.nH₂O) .

A) 5 waters.
B) 6 waters.
C) 7 waters.
D) 8 waters.
E) 3 waters.