What is the molarity of a solution containing 6 moles of NaCl dissolved in 2 L of aqueous solution?

• A. 12 M
• B. 3 M
• C. 0.33 M
• D. 6 M

Answer: (B)

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. Determine the given values from the problem: moles of NaCl = 6 moles, volume of solution = 2 L.
3. Substitute the known values into the molarity formula: \(M = \frac{6}{2}\).
4. Perform the division to find the molarity (note: do not calculate the final value here, just set up the expression).
5. Interpret the result as the concentration of the NaCl solution in moles per liter (M), which tells you how many moles of NaCl are present in each liter of solution.