Question 1
What mass of NaCl is contained in 24.88 g of a 15.00% by mass solution of NaCl in water?
◦ 12.44 g
◦ 3.73 g
◦ 21.15 g
◦ 20.00 g
◦ 1.50 g
Question 2
A solution is prepared by dissolving 38.6 g sucrose (C
12H
22O
11) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.
◦ 7.80 × 10
-2◦ 1.28 × 10
-3◦ 2.45 × 10
-3◦ 4.09 × 10
-3◦ 7.23 × 10
-2