When collecting larvae from a body, half are to be preserved immediately and what should be done with the other half? (Forensic Science)

One or more substances changing into one or more substances is an example of a

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

Will mark brainliest how many electrons can be held in the energy level n = 4?