Ling is doing a science project. She likes to exercise. She wants to find out about heart rates. She wants to see how long it takes for heart rates to slow down to normal after exercise.

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.