Molality of an aqueous solution of urea is 4.44 m. Mole fraction of urea in solution is . Value of x is (Integer answer)

Question

Molality of an aqueous solution of urea is 4.44 m. Mole fraction of urea in solution is . Value of x is  (Integer answer)

Canvas Classes · Accepted Answer

Strategy:
 Molality () expresses the number of moles of solute per 1 kg of solvent. By assuming exactly 1 kg of solvent (water), we can calculate the moles of both urea and water, and subsequently find the mole fraction.

Step 1: Assume 1 kg (1000 g) of water as the solvent
- Moles of urea () = 4.44 mol (from the definition of molality)
- Moles of water () =

Step 2: Calculate the mole fraction of urea ()

Step 3: Express as 
.

More questions from Solutions