A solution is 15% NaCl by mass. If the total mass of the solution is 500 grams, evaluate the mass of NaCl and the mass of the solvent.

• A. 425 grams NaCl, 75 grams solvent
• B. 75 grams NaCl, 500 grams solvent
• C. 75 grams NaCl, 425 grams solvent
• D. 85 grams NaCl, 415 grams solvent

Answer: (C)