Which reaction produces the most energy per mass?
fission
fusion
chemical
ionization

The reaction which produce the most energy per mass is NUCLEAR FUSION. This is because, fusion involves the coming together of two nuclei; the binding energy that hold the nucleus together is very great. The complete conversion of one gram of matter in a fusion process will release 9*10^13 joules of energy. Fusion reactions have very high energy density which is many times greater than all other types of reaction.

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way.