Smoke is the normally referred to as a byproduct of a combustion reaction.
i.e. it can be anything released from fire.
for e.g:
methane or CH4+O2= CO2 + 2 H2O
Or ethanol:CH3CH2OH + O2 = 4 CO2 + 6 H2O
~anon!
Moo.
E = mc^2 = mass-energy equivalence
However, because only anti-matter is the only thing that converts pure matter into pure energy (100% conversion of matter into energy), most of the fuels we have today only release small amounts of energy despite their mass. A gram of matter and a gram of anti-matter is the order of the bomb dropped on Hiroshima.