Apharmaceutical chemist is working on a new large-scale synthesis for the popular pain reliever, naproxen. to be useful, however, the synthesis must be highly stereospecific, for whereas the (s) isomer of naproxen is a safe pain-reducing drug, the (r) isomer is a potentially harmful liver toxin. to determine the purity of the synthesized product, the chemist dissolves 81.6 mg of obtained product in 2.40 ml of solvent and measures the optical activity of the sample in a 5.00-cm tube, observing a value of +1.03? . a 0.500 g/ml solution of pure (s) isomer is measured under identical conditions, giving a value of + 16.5 ? .part a: continue your analysis by finding the specific rotation, [? ], of the synthesized product. express your answer in degrees. part b: determine the optical purity of the obtained product, using the calculated specific rotation values for the pure (s)-naproxen and the synthesized product. express your answer as a percentage. part c: assuming that the only impurity present in the synthesized product is the (r) enantiomer, calculate the percentage of (s)-naproxen it contains, using the previously determined value for optical purity. this can be done by adding the following two equations where d and l represent the percent quantities of the two enantiomers: d ? l = optical purityd + l = 100%
state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne
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hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?