13. How much NaCl is needed to make 75 mL of a 12% (w/v) solution? A) 30 g B) 6.0 g C) 7.5 g D) 9.0 g E) 12 g 14. Which solution is the most concentrated? Each choice refers to the same solute and solvent. A) 2.4 g solute in 2 mL solution B) 2.4 g solute in 5 mL solution C) 20 g solute in 50 mL solution D) 30 g solute in 150 mL solution E) 50 g solute in 175 mL solution 15. What is the molarity of a solution prepared by dissolving 10.0 g of acetone, C3H60, in enough water to make 125 mL of solution? A) 4.65 M B) 1.38 M C) 0.0465 M D) 0.0214 M E) 0.0125 M