Understanding Molarity

Molarity (M) is a unit of concentration that expresses the number of moles of solute dissolved in one liter of solution.

Formula:

Molarity (M) = Moles of solute / Liters of solution

Steps

1. Convert mL to L:

150 mL * (1 L / 1000 mL) = 0.15 L

2. Apply the molarity formula:

M = 0.20 mol / 0.15 L = 1.33 M

Answer:

The molarity of the solution is 1.33 M.