What is always true according to the Law of Conservation of Matter?

Question

New molecules cannot be formed from the reactants during a chemical reaction

Atoms can be rearranged during a chemical reaction but cannot be added or taken away.

The total number of molecules before and after a chemical reaction stays the same.

Atoms created during a chemical reaction must have the same mass as the atoms in the reactants.

Answer 1

According to the Law of Conservation of Matter, the statement that is always true is:

Atoms can be rearranged during a chemical reaction but cannot be added or taken away.

This law states that matter cannot be created or destroyed in a chemical reaction, meaning the total number of atoms remains constant throughout the process, even though they can be rearranged to form new molecules.