Mole Concept and Some Basic Concepts of ChemistryhardCOMPREHENSIVE

**Passage 3:** Concentration terms like Molarity () and Molality () are related by density (). For aMole Concept and Some Basic Concepts of Chemistry Chemistry Question

Question

**Passage 3:** Concentration terms like Molarity ($M$) and Molality ($m$) are related by density ($d$). For a $10\% \text{ (w/w) } NaOH$ solution with density $1.2 \text{ g/mL}$, find the Molarity.

Answer: A

💡 Solution & Explanation

$M = \frac{10 \times d \times \%}{MW} = \frac{10 \times 1.2 \times 10}{40} = \frac{120}{40} = 3 \text{ M}$.

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