A solution is prepared by dissolving 15.0 g of NH₃in 250 g of water. The density of the resulting solution is 0.974 g/mL. The molarity of NH₃in the solution is _ _. A) 3.53 B) 3.24 C) 0.882 D) 60.0 E) 0.00353

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Quizplus · Accepted Answer

To find the molarity, first calculate the moles of NH3: 15.0 g / 17.03 g/mol = 0.880 moles. The total mass of the solution is 265 g (15 g NH3 + 250 g water). Using the density, the volume of the solution is 265 g / 0.974 g/mL = 272.2 mL = 0.2722 L. Molarity = moles/volume = 0.880 moles / 0.2722 L = 3.24 M.

A Solution Is Prepared by Dissolving 15