Problem: A 0.3146-g sample of a mixture of NaCI(s) and KBr(s) was dissolved in water. The resulting solution required 46.90 mL of 0.08765 M AgNO3(aq) to precipitate the Cl^-(aq) and Br^-(aq) as AgCI(s) and AgBr(s). Calculate the mass percentage of NaCI(s) in the mixture.

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A 0.3146-g sample of a mixture of NaCI(s) and KBr(s) was dissolved in water. The resulting solution required 46.90 mL of 0.08765 M AgNO3(aq) to precipitate the Cl^-(aq) and Br^-(aq) as AgCI(s) and AgBr(s). Calculate the mass percentage of NaCI(s) in the mixture.