6.) Determine the molarity of these solutions: (Assume that all are aqueous)

a) 1.67 moles of Na2SO3 dissolved to make 3.04 liters of solution.

b) 0.629 moles of Na2O to make 1.500 liters of solution.

c) 47.83 grams of Na2CO3 to make 10.00 liters of solution.

d) 8.97 grams of (NH4)2CO3 to make 250 mL of solution.

e) 4.48 grams of FeCl2 to form 450.0 mL of solution.

7.) Given an aqueous solution that is 28.23% by mass NaCl and has a density of 1.17 g/mL Calculate the mol fraction, the molality and the molarity.

8.) A 1.7 M solution is made by dissolving LiBr in Methanol (CH3OH). The solution has a total volume of 1.0 L and density of 0.746 g/mL. Calculate the % by mass of LiBr, the mol fraction and molality of LiBr.