Below are the structures for benzonitrile, nicotine and ca Each atom obeys the o

Question

Below are the structures for benzonitrile, nicotine and ca Each atom obeys the octet rule (duet for hydrogen and no atom possesses a formal charge C H. CH benzonitrile micotine caffeine (Lone pairs and non-methyl hydrogens are understood.) a) What is the total number of hydrogens in the nicotine molecule? b) What is the total number of lone pairs in the caffeine molecule? c) What is the molecular formula for caffeine? Use the format CWHxNyoz where w, x, y and z represent the subscripts. d) In the nicotine molecule the approximate angle about the nitrogen bonded to the other nitrogen a methyl group (CH3-) is: the one which has a double bond) is O 90 O 180 O 1200 O 120 109 109 O 180 90 CH

Explanation / Answer

a) 14

b] 8 [ 2 from each Oxygen and 1 from each Nitrogen]

c] C8H10N4O2

d] 109 [sp3 ] and 120 [sp2]

e] 5 pi bonds and 13 sigma bonds

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