3. Determine the composition of the phases specified for each of the following phase equilibria (a) The organic solvent phase in equilibrium with an aqueous solution of uranyl nitrate of concentration 0.4 mole uranyl nitrate per liter water at 25C (b) The two liquid phases in a mixture with an overall composition of 0.25 mole fraction acetic acid, 0.30 mole fraction isopropyl ether, 0.45 mole fraction water at 20C (c) The silica-gel phase in equilibrium with a gas containing 0.6 mole fraction propane, 0.4 mole fraction propylene (d) An underflow sludge in equilibrium with a solution containing 20 mass percent solute and 80 mass percent solvent. The sludge retains 2 lb of solution per pound of insoluble material.