Which of the following represents the correct units for molarity?

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

Answer: (D)

Verified step by step guidance

1. Understand that molarity is a measure of concentration 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. Analyze each unit option given: mol/kg represents molality, L/mol is the inverse of molarity, and g/L is a unit of density or concentration by mass, not molarity.
4. Identify that the correct unit for molarity must have moles in the numerator and liters in the denominator, matching \(\text{mol}/\text{L}\).
5. Conclude that the correct units for molarity are \(\text{mol}/\text{L}\), which directly corresponds to the definition of molarity.