  We demonstrate the benefits of a convex geometric perspective for questions
on chemical stoichiometry. We show that the balancing of chemical equations,
the use of "mixtures" to explain multiple stoichiometry, and the half-reaction
for balancing redox actions all yield nice convex geometric interpretations. We
also relate some natural questions on reaction mechanisms with the enumeration
of lattice points in polytopes. Lastly, it is known that a given reaction
mechanism imposes linear constraints on observed stoichiometries. We consider
the inverse question of deducing reaction mechanism consistent with a given set
of linear stoichiometric restrictions.
