329.10 g is the mass of 1.59 moles of Ca(ClO3)2
Quarts are a measurement for liquids.
1 quart is equivalent to 0.943 litres
The volume of the solution is 2.50 L
Since 0.943 L = 1 quart
Then 2.50 L = 1 quart/0.943 L x 2.50 L
Volume = 2.65 quarts
Volume in quarts is 2.65 qt