The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H₂O is _ . A) 0.37 B) 0.58 C) 9.1 D) 0.13 E) 0.11

Question

Quizplus · Accepted Answer

To find the mole fraction of urea, calculate the moles of urea and water. Moles of urea = 16 g / 60 g/mol = 0.267 mol. Moles of water = 39 g / 18 g/mol = 2.167 mol. Mole fraction of urea = moles of urea / (moles of urea + moles of water) = 0.267 / (0.267 + 2.167) = 0.11.

The Mole Fraction of Urea (MW = 60