Worst. Chemistry. Teacher.

(Seriously, C-H-H? Pentavalent carbon on a malformed TNT molecule with missing oxygens? C-H-O2? HOOC-NHO2? WAT.

I don't expect all artists to be conversant in chemistry, but counting atom valencies is very basic stuff, especially for C, H and N. One or two mistakes are okay, but this is just too much, and detracts from the character who's supposed to be skilled at chemistry.)