The vapor pressure of water above a solution of water and a nonvolatile solute at 68 °F is 2.3 cm Hg. What is the mole fraction of the solute? (The vapor pressure of pure water is 23.8 torr at 25°C).
We know that 1cmHg= 10torr
2.3cm Hg= 23torr
"P=P_{pure}\u00d7mole fraction\\\\ \n23=23.8\u00d7mole fraction\\\\\nmole fraction= 0.96"
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