A solution is prepared by dissolving 14.0 g of NH₃ in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The mole fraction of NH₃ in the solution is __________. A)0.0550 B)0.0560 C)0.940 D)0.922 E)16.8

Question

Quizplus · Accepted Answer

To find the mole fraction of NH3, calculate the moles of NH3 and water, then divide the moles of NH3 by the total moles. Moles of NH3 = 14.0 g / 17.03 g/mol = 0.822 moles. Moles of water = 250.0 g / 18.02 g/mol = 13.88 moles. Mole fraction of NH3 = 0.822 / (0.822 + 13.88) = 0.0560.

A Solution Is Prepared by Dissolving 14