Which statements describe the death of stars? check all that apply.
a star’s final stages of life depend on its mass.
stars die when they run out of fuel.
when a star starts to die, its core expands.
the outer portion of the star contracts.
all stars become black holes when they die.

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.