Understanding Molarity

Molarity (M) is a measure of concentration defined as moles of solute per liter of solution.

Formula

Molarity (M) = Moles of Solute / Liters of Solution

Calculation

1. Identify the given values:

* Moles of NaCl (solute): 15 moles

* Liters of solution: 2.5 L

2. Plug the values into the formula:

M = 15 moles / 2.5 L

3. Calculate the molarity:

M = 6 M

Answer: The molarity of the 2.5 L sample containing 15 moles of NaCl is 6 M.