COMEDK · Chemistry · 17. Solutions
An aqueous solution of glucose boils at \(100.01^{\circ} \mathrm{C}\). The number of glucose molecules in a solution containing \(100 \mathrm{~g}\) of water is _________ [\(\mathrm{K}_{\mathrm{b}}\) for water is \(0.5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\)]
- A \(1.204 \times 10^{23}\)
- B \(1.204 \times 10^{21}\)
- C \(6.022 \times 10^{23}\)
- D \(6.022 \times 10^{21}\)
Answer & Solution
Correct Answer
(B) \(1.204 \times 10^{21}\)
Step-by-step Solution
Detailed explanation
The elevation in boiling point is given by \(\Delta T_b = T_b - T_b^{\circ} = 100.01^{\circ} \text{C} - 100^{\circ} \text{C} = 0.01 \text{ K}\). Using the formula \(\Delta T_b = K_b \times m\), where \(m\) is the molality of the solution:…
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