# Problem: A solution of urea [(NH2)2CO] (MM: 60 g/mol) in water has a vapor pressure 2.50 mmHg less than that of pure water at 30°C (The vapor pressure of water at 30°C is 31.8 mmHg). a. What is the mole fraction of urea in this solution?     b. How many grams of urea does this correspond to?

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A solution of urea [(NH2)2CO] (MM: 60 g/mol) in water has a vapor pressure 2.50 mmHg less than that of pure water at 30°C (The vapor pressure of water at 30°C is 31.8 mmHg).

a. What is the mole fraction of urea in this solution?

b. How many grams of urea does this correspond to?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Colligative Properties concept. You can view video lessons to learn The Colligative Properties. Or if you need more The Colligative Properties practice, you can also practice The Colligative Properties practice problems.

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