Which of these compounds is aromatic? Select one: O a. b. C. C O Which bond would take the most energy to stretch or break? Select one: a. C-CI b. C-H C. C-O d. C-N Which carbocation is most stable? Select one: a. ethyl b. isopropyl c. methyl d. tert-butyl Which is the correct Newman projection of the N-C-O-H dihedral angle in this conformation of 2-hydroxypyridine? Select one: a. b. C. d. XN ! H 0 N .H