Which statement regarding nuclear and chemical reactions is not true?
a. chemical reactions involve electrons.
b. only chemical reactions produce stable atoms
c. nuclear reactions release more energy per mole
d. only nuclear reactions occur in the nucleus of the atom

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .