If of NaOH is completely dissolved to prepare exactly of an aqueous solution, what is the molarity o — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Molarity ($M$) = $\frac{\text{Mass of solute}}{\text{Molar Mass}} \times \frac{1000}{\text{Volume in mL}}$. Here, $M = \frac{0.4}{40} \times \frac{1000}{40} = 0.01 \times 25 = 0.25\text{ M}$.