Which of the following is the correct unit for molarity, a measure of concentration?

• A. g/L
• B. mol/L
• C. L/mol
• D. mol/kg

Answer: (B)

Verified step by step guidance

1. Understand that molarity is defined as the number of moles of solute dissolved in one liter of solution.
2. Recall the formula for molarity: \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\).
3. Identify the units involved: moles (mol) for the amount of substance and liters (L) for the volume of solution.
4. Recognize that molarity is expressed as moles per liter, which corresponds to the unit \(\text{mol/L}\).
5. Compare the given options and confirm that \(\text{mol/L}\) correctly represents molarity, while the others represent different concentration units or are incorrect.