This happens because chemical bonds break in the reactants and new chemical bonds form in the products.
(This; happens; because chemical bonds break in the reactants and new chemical bonds form in the products) (chemical bonds; break; L:in the reactants) (new chemical bonds; form; L:in the products)
This chemical bonds new chemical bonds
happens break form
because chemical bonds break in the reactants and new chemical bonds form in the products
L:in the reactants
L:in the products