When of glucose (, molar mass ) is dissolved in of water, what is the elevation in boiling point? ( for water )
Answer and explanation
Correct answer: B.
- Step 1: Number of moles of glucose is .
- Step 2: Molality of the solution is .
- Step 3: Boiling point elevation is .
Answer
.
Why not the others: assumes of solute; multiplies by 10; and mistakenly doubles the molality.
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