What is the molality of $\mathrm{C_{2}H_{5}OH}$ in water solution which will freeze at $-10^{\circ}\mathrm{C}$? [Mol. wt. of $\mathrm{C_{2}H_{5}OH}=46$, $K_{f}$ for water $=1.86$]
- A$6.315\,\mathrm{m}$
- B$63.15\,\mathrm{m}$
- C$3.540\,\mathrm{m}$
- D$5.3\,\mathrm{m}$
✓ Correct answer: D
Want the full step-by-step reasoning?