According to the law of conservation of matter (or mass), you can not create or destroy matter (or mass). You only transform it.
The law is most relevant to chemical processing where matter changes form dramatically, but if you do a careful accounting of all elements going into a chemical process, the quantity and mass of every element coming out totals up to the same as went in. This is, of course, important in engineering applications as well.
To get technical though, the simple version of the law is not correct in exotic circumstances. Elements do change when there is radioactivity and in such circumstances the mass changes slightly as well. When one is extremely precise in stating this conservation law, one must include the special theory of relativity and Einstein's famous equation, energy equal mass time the square of the speed of light. So, technically, mass and energy combined are conserved.
The law of conservation of mass/matter states that mass/matter cannot be created or destroyed in chemical or physical changes.
The law of conservation of matter is applied to processes not to a compound.
The law of conservation of matter states that in a chemical reaction, matter is neither created nor destroyed.
The law of conservation of matter
If matter were destroyed, then it would not be conserved. "Conservation" means that the amount of mass doesn't change.
If by the law of conservation you mean the Law of Conservation of Matter, then it states that matter cant be created or destroyed.
If by the law of conservation you mean the Law of Conservation of Matter, then it states that matter cant be created or destroyed.
The conservation of Energy-Matter.
The law of conservation of mass/matter states that mass/matter cannot be created or destroyed in chemical or physical changes.
The law of conservation of matter is applied to processes not to a compound.
Answer the question...
The law of conservation of mass, which states that in a closed system, mass is neither created nor destroyed, it can only change form. This means that in a chemical reaction that takes place in a closed system, the mass of the reactants equals the mass of the products.
Mass can not be lost. According to the Law of Conservation of Mass, matter can not be created or destroyed.
You are confusing the law of conservation of matter/mass with the law of conservation of energy. The law of conservation of matter/mass states that in a closed system matter is neither created nor destroyed. During a chemical reaction matter is rearranged, it doesn't change forms (energy can change forms). The atoms in the products are the same atoms that were in the reactants.
The law of conservation of matter states that in a chemical reaction, matter is neither created nor destroyed.
The law of conservation of matter
All chemical reactions obey the law of conservation of matter.