Which are constitution isomers?    

     

D) cal structures stereoisomers constitutional isomers different compounds with different compositions 2. Which of the following are constitutional isomers? CH I HC A) I, II, and III B) I, III, and IV II CH CH3 III C) D) HC-C=N-6: A) +1,-1 B) 0,-1 C) +1,0 D) 0,0 CH3 IV only I and III all are constitutional isomers 3. The formal charges on the nitrogen and oxygen in the following structures are, respectively: 4. Based on the VSEPR model, which of the following species has (have) a trigonal planar geometry? I. BC13 II. NH, III. NO A) only I B) I and II C) I and III D) I, II, and III 5. The H-C-H bond angles in ethylene, CH4, are closest to A) 90. B) 109.5. C) 120. D) 180.