(AIEEE 2009) The density of a solution prepared by dissolving of urea (MW=60) in of water is . The m — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
(AIEEE 2009) The density of a solution prepared by dissolving $120\text{ g}$ of urea (MW=60) in $1000\text{ g}$ of water is $1.15\text{ g/mL}$. The molarity of this solution is:
Answer: C
💡 Solution & Explanation
$\text{Total mass} = 1120\text{ g}$. <br>$\text{Volume} = 1120 / 1.15 = 973.9\text{ mL}$. <br>$\text{Moles} = 120 / 60 = 2\text{ mol}$. <br>$\text{Molarity} = 2 / 0.9739 \approx 2.05\text{ M}$. [24, 34]
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