Part iii. is the dissolution reaction of ammonium nitrate enthalpy favored?

No, it is not enthalpy favored since the chemical system gains energy.

Explanation:

The dissolution of ammonium nitrate in water is an endothermic process.

Endothermic process requires the system to gain energy to can dissolve the particles in water.

So, the reaction is not enthalpy favored.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;