If 3.0 moles of solute are dissolved in 2.0 kilograms of solvent, the molality is?

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Study for the Honors Chemistry Exam with flashcards and multiple choice questions. Enhance your understanding with detailed explanations and hints. Prepare to excel in your exam!

Multiple Choice

If 3.0 moles of solute are dissolved in 2.0 kilograms of solvent, the molality is?

Explanation:
Molality is defined as the number of moles of solute per kilogram of solvent. Here, you have 3.0 moles of solute dissolved in 2.0 kilograms of solvent, so the molality is 3.0 ÷ 2.0 = 1.5 mol/kg. This measure uses the mass of the solvent (not the total solution) and is typically independent of temperature changes that affect volume. Therefore the correct value is 1.5 mol/kg.

Molality is defined as the number of moles of solute per kilogram of solvent. Here, you have 3.0 moles of solute dissolved in 2.0 kilograms of solvent, so the molality is 3.0 ÷ 2.0 = 1.5 mol/kg. This measure uses the mass of the solvent (not the total solution) and is typically independent of temperature changes that affect volume. Therefore the correct value is 1.5 mol/kg.

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