Final answer:
The correct answer is that chemical reactions involve the making and breaking of chemical bonds, adhering to the law of conservation of mass where the number of atoms remains unchanged.
Step-by-step explanation:
The correct answer to the question is: C) They involve the making and breaking of chemical bonds. Chemical reactions are processes whereby atoms are reorganized through the making and breaking of chemical bonds, resulting in the transformation of substances. These reactions adhere to the law of conservation of mass, which states that atoms are neither created nor destroyed during the reaction, ensuring that the number of atoms of each element remains constant throughout the process. Therefore, statement D is incorrect as the number of atoms given for each element must be the same on both sides of a chemical equation once it is balanced.
Furthermore, the concept of chemical equilibrium is important to understand. Chemical equilibrium is achieved not necessarily when amounts of products and reactants are equal (statement B is misleading), but when the rate of the forward reaction equals the rate of the reverse reaction. Equilibrium does not depend on the amounts being equal but rather on the rates of the reactions. Lastly, both organic and inorganic molecules can participate in chemical reactions, disproving statement E, and matter is not created or destroyed as per statement A.