1pt The idea that matter is neither created nor destroyed in chemical reactions is known as the: O A. law of conservation of chemicals.
O B. law of conservation of energy.
C. law of conservation of mass.
OD. second law of thermodynamics.

C Law of Conservation of Mass
Because-
The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass. In a physical change, a substance's physical properties may change, but its chemical makeup does not