Calculate the mass defect and nuclear binding energy of an atom ... To convert to joules per nucleon, simply divide by the number of nucleons.
More than likely, your seeing a chemical reaction. The bubbles that are forming are caused by two compounds interacting with each other.
Answer:
the sum of the atomic masses of the elements
It would have to be carbon dioxide, the only gas listed. For gases, 1 mole of particles occupies 22.4 L of volume at STP.