It is always true, but may be a little confusing if you run an experiment where, for example, a gas is formed as one of the products, and that gas escapes into the atmosphere. Thus, you wouldn't collect it, and so the mass of the products would APPEAR to be less than the mass of the reactants. But alas, conservation of matter always holds true.
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
Antoine Lavoisier
The law that states mass cannot be created or destroyed in chemical or physical changes is the Law of Conservation of Mass, also known as the Principle of Mass Conservation. This law implies that in a closed system, the total mass remains constant before and after any chemical or physical process, even if the substances undergo a change in form or state.
If by the law of conservation you mean the Law of Conservation of Matter, then it states that matter cant be created or destroyed.
matter is neither created nor destroyed (this is not 100% true but for most purposes the specifics are unnecessary)
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 law of conservation of matter states that matter is neither created nor destroyed. An example of this is a simple combustion reaction of methane. CH4 + 2O2 --> CO2 + 2H2O. There is 1 carbon, four oxygen's and four hydrogens on each side, thus showing conservation of matter.
The law of conservation of matter is applied to processes not to a compound.
False. The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. The total mass of the reactants must equal the total mass of the products.
The law of conservation of matter is also known as the law of conservation of mass. It states that mass is neither created nor destroyed in a chemical reaction, only rearranged.
law of conservation of mass
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The law of conservation of matter states that in a chemical reaction, matter is neither created nor destroyed.
The Law of Conservation of Matter states that matter is neither created nor destroyed in a chemical reaction. This means that the total mass of the reactants before a reaction must equal the total mass of the products after the reaction.
The law of conservation of matter