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Answer :
Final answer:
Explanation of molality and vapor pressure in a KNO₃ solution at 100°C.
Explanation:
**Molality** is the subject of this question. Molality is calculated by dividing the number of moles of solute by the mass of the solvent in kilograms. In this case, the molality of the KNO₃ solution is 1.37 mol/kg.
The vapor pressure of this aqueous solution at 100°C can be calculated using **Raoult's law**. The vapor pressure of the solution will be lower than that of pure water due to the presence of the solute particles.
Using the molality provided, you can calculate the vapor pressure of the KNO₃ solution at 100°C by considering the **ideal behavior of solutions** and the lowering of vapor pressure due to the presence of solute particles.
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