CHEM164 Midterm: CHEM 164 UofA ExamsChemX6X Midterm 2
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8: determine whether the following pairs of structures are identical, structural isomers, or stereoisomers. (4 points each) 4: conformation, draw the newman projection showing the gauche conformation of the central bond of hexane. (4 pts, draw the most stable conformation of the molecule shown below. If you make an error, please redraw the template. (2 pts: in the structure below, circle one of the isoprene units and specify to what type of terpene class this molecule belongs. (2 pts) The highly irritating and toxic compound in the extract is cantharidin, which contains only c, h and o atoms. H 6. 17%: show how to calculate the empirical formula. (14 pts) 100% - 61. 21% - 6. 17% = 32. 62% oxygen. Divide % composition by atomic weights to get crude ratios of atoms. Divide each crude ratio by smallest crude ratio to get refined ratios (smallest become integer) Multiply each refined ratio by integer (1, 2, 3) to get integral ratios of atoms.
