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Determine the mass of the lead in grams if the water level in a graduated cylinder initially at 224 mL rises to 274 mL after a piece of Pb is submerged?

A sample of36.0-mg an organic compound (MW = 84g/mol) is mixed in water of 10.0-mL . solution is extracted with five mili litres of hexane. it now contains 12.0 milligrams of the organic compound. Determine the partition coefficient (Kp hexane/water) for the compound?

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