What mass of an aqueous 22.9% sodium chloride solution contains 99.5 g of water?
A) 129 g
B) 29.6 g
C) 0.500 g
D) 22.8 g
E) 99.5 g

Question

Quizplus · Accepted Answer

To find the total mass of the solution, use the formula: mass of solution = mass of solute + mass of solvent. Given that the solution is 22.9% NaCl, the remaining 77.1% is water. If 99.5 g is 77.1% of the solution, the total mass of the solution is 99.5 g / 0.771 = 129 g.

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