What Is the Vapor Pressure at 20°C of an Ideal

question 70

Multiple Choice

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.50 g of the nonvolatile solute urea,CO(NH₂) ₂,to 22.7 g of methanol,CH₃OH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg.

• A) 8.51 mmHg
• B) 64.9 mmHg
• C) 74.3 mmHg
• D) 80.5 mmHg
• E) 24.1 mmHg

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