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You weight out exactly 1.00 mg of benzoic acid and dissolve it in a mixture of...

You weight out exactly 1.00 mg of benzoic acid and dissolve it in a mixture of 2.0 mL of diethyl ether and 2.0 mL of water. After mixing and allowing the layers to separate, the ether layer is removed, dried, and concentrated to yield 0.68 mg of benzoic acid. What is the Kp value (ether/water) for this system?

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