1-25 continued H H:O: C三N: H _C-H C-H H H H 0 0: (g H-- H-C-N=C=δ ①H-C-0- 0 -H HH H H :-N-0 H k H 126 H :O:H :O: (a) 9-H H-:H0: ()H-c=c-c-c-c-8-H (d)H-c=c-c=c-c-g-c-B HHH H 1-27 In each set below,the second structure is a more correct line formula.Since chemists are human COOH (b) CHO COOH (d) OR 14 Copyright2013 Pearson Education,Inc