4 is true I learned that the hard way
I believe it is either A or D
sorry if i am wrong
Answer:
Chemical reactions begin with reactants and end with products.
Explanation:
Chemical reactions begin with reactants and end with products. Synthesis reactions bond reactants together, a process that requires energy, whereas decomposition reactions break the bonds within a reactant and thereby release energy. In exchange reactions, bonds are both broken and formed, and energy is exchanged.
