A saline solution contains 72.3 grams of NaCl in 500.0 mL if water. What is the concentration (Molarity) of this solution?

2.47 M

Explanation:

Molarity is (mol of solute) / (L of solvent). To find molarity, convert grams of NaCl to moles of NaCl and milliliters of water to liters of water.

72.3 g : 58.44 g/mol = 1.2372 ... mol

500 mL : 1000 mL = 0.5 L

Molarity = 1.2372/0.5 = 2.47 M