38.9 g of lactose (C₁₂H₂₂O₁₁) is dissolved in 483 g of water to a final volume of 496 mL. Determine the concentration of this solution in the following units.
a. Molarity


b. Molality


c. Percent by mass


d. Mole fraction


e. Mole percent

• A. a. 0.235 M, b. 0.229 m, c. 4.03%, d. 4.83x10^-3, e. 0.48%
• B. a. 229 M, b. 235 m, c. 4.03%, d. 4.83x10^-3, e. 0.48%
• C. a. 0.229 M, b. 0.235 m, c. 7.45%, d. 4.22x10^-3, e. 0.42%
• D. a. 0.235 M, b. 0.229 m, c. 8.05%, d. 4.22x10^-3, e. 0.42%

Answer: (C)