How many bonds are in caffeine?

There are 29 bonds in caffeine! How did I get my answer?

The chemical formula for caffeine is C8H10N4O2

1. Count total octet electrons

64+20+32+16=132

2. Count the # of valence electrons in the molecule.

32+10+20+12=74

3. Subtract valence electrons from octet electrons

132-74=58

4. Divide the bonding electrons by 2 to find the number of bonds.

58/2=29