Anhydrous calcium chloride is a good drying agent because it will rapidly pick up water. Suppose you have stored some carefully dried CaCl₂ in a desiccator. Unfortunately, someone did not close the top of the desiccator tightly, and the CaCl₂ became partially hydrated. A 150-g sample of this partially hydrated material was dissolved in 80 g of hot water. When the solution was cooled to 20°C, 74.9 g of CaCl₂ ⋅ 6 H₂O precipitated. Knowing the solubility of calcium chloride in water at 20°C is 74.5 g CaCl₂/100 g water, determine the water content of the 150-g sample of partially hydrated calcium chloride (in moles of water per mole of CaCl₂).