At 20 °C, a 1.73 M aqueous solution of ammonium chloride has a density of 1.0257 g/mL. What is the mass % of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol. A)1.85 B)3.31 C)1.68 D)0.594 E)9.00

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Quizplus · Accepted Answer

To find the mass %, calculate the mass of NH4Cl in 1 L of solution: 1.73 mol/L * 53.50 g/mol = 92.555 g. The mass of 1 L of solution is 1025.7 g (density * volume). Mass % = (92.555 g / 1025.7 g) * 100% = 9.02%, approximately 9.00%.