88 multiple choice\nlisten\nwhat must happen for a chemical reaction to occur?\nselect all that apply.\na…

88 multiple choice\nlisten\nwhat must happen for a chemical reaction to occur?\nselect all that apply.\na the law of the conservation of mass is followed.\nb atoms are gained or lost.\nc the reactants must change phases.\nd chemical bonds break, and new chemical bonds are formed.

88 multiple choice\nlisten\nwhat must happen for a chemical reaction to occur?\nselect all that apply.\na the law of the conservation of mass is followed.\nb atoms are gained or lost.\nc the reactants must change phases.\nd chemical bonds break, and new chemical bonds are formed.

Answer

Answer:

D. Chemical bonds break, and new chemical bonds are formed.

Brief Explanation:

In a chemical reaction, bonds in reactants break and new - bond formation in products occurs. Mass is conserved in all chemical reactions (A is a general fact but not a requirement for reaction to occur), atoms are neither gained nor lost (B is incorrect as per conservation of atoms), and reactants don't have to change phases for a reaction to happen (C is incorrect).