What is always true according to the Law of Conservation of Matter
1. The total number of molecules before and after a chemical reaction stays the same.
2. Atoms created during a chemical reaction must have the same mass as the atoms in reactants.
3. New molecules cannot be formed from the reactants during a chemical reaction.
4. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.
1 answer
4. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.