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Show supporting work on your paper. Find the measure of angle B and the length of side b for the triangle shown below, where the measure of angle A is 53.1°, the measure of angle C is 90°, and the length of side a is 5.2 cm. Make sure your calculator is in degree mode. Round your answer to the nearest tenth. solve right triangle.jpg     Side b = [BLANK-1] Angle B = [BLANK-2]

Which is the “zigzag” skeletal representation of the following Fischer projection?

Which set of molecules is NOT considered to be a set of constitutional isomers?

A solution of a pure chiral molecule has a specific rotation of -23.1o. What is the specific rotation of a solution that is 83% (+) enantiomer and 17% (-) enantiomer?

Which of the given Haworth projections corresponds to the following chair conformation?

Naltrexone is an antagonist at the mu opioid receptor. What are the hybridization state and geometry of the nitrogen atom in naltrexone?

Turn the original molecule shown below 90o in a clockwise direction on the plane of this paper. Which choice represents the product of this manipulation?

Consider the skeletal structure below and answer the following questions:  (13.25 pts) (a) Convert the skeletal structure to the chair conformation and complete the ring flip, drawing the ring-flipped conformer. Note the following: Pay close attention to the numbering scheme provided.   Be certain to draw the properly orient axial and equatorial bonds on each chair conformer.  Be certain to draw in hydrogen atoms on the three carbons of the cyclohexane right that already have substituents.  (you don’t need to draw in all the H’s on the ring) (b) identify the MOST STABLE conformer by placing an asterisk (*) above the molecule.  Succinctly explain why it is the most stable conformer. (c) place the proper arrow that indicates that the conformers are rapidly interconverting in solution. 

The carbon atoms in the molecule below are labeled 1–8. Which C—C—C bond angle in the molecule would be approximately 120o?

The mass spectrum for an unknown molecule has an molecular ion peak with a relative intensity of 50 and an (M+1) peak with a relative intensity of 1.65. How many carbons are in the unknown molecule?