What is the molarity of a solution prepared by dissolving 3.0 moles of sodium bromide (NaBr) in 600 mL of solution?

• A. 0.50 M
• B. 0.20 M
• C. 5.0 M
• D. 2.0 M

Answer: (D)

Verified step by step guidance

1. Identify the formula for molarity, which is defined as the number of moles of solute divided by the volume of the solution in liters: \(M = \frac{\text{moles of solute}}{\text{volume of solution in liters}}\).
2. Note the given values: moles of sodium bromide (NaBr) = 3.0 moles, and volume of solution = 600 mL.
3. Convert the volume from milliliters to liters because molarity requires volume in liters: \$600\ \text{mL} = \frac{600}{1000} = 0.600\ \text{L}$.
4. Substitute the values into the molarity formula: \(M = \frac{3.0\ \text{moles}}{0.600\ \text{L}}\).
5. Perform the division to find the molarity, which will give the concentration of the NaBr solution in moles per liter.