A helium atom is about 0.71% less massive than the four hydrogen atoms that combine to form it, and that lost mass is converted to energy (with the amount of energy given by the formula E = mc2).

Chemical reactions can be described by chemical equations. The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.

Matter is anything that has mass and takes up space. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. 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.

Following the Law This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

The law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction. Thus, the amount of matter cannot change. Because mass is always conserved in chemical reactions, balanced chemical equations have the same number and type of each atom on both sides of the equation.

Explanation: Mass can neither be created nor be destroyed.

What happens to the total mass of a substance undergoing a physical change? It stays the same.

The mass that is neither incorporated into the animal’s body nor passed as waste is converted directly into energy. Instead, a portion of the mass was broken down to release the energy that it contained, locked inside its chemical bonds. …

1 Answer. The law of conservation of mass states that, for any closed system, the mass of the system must remain constant. In a burning log, the initial mass of the wood and the ashes that are left behind after it burns are different, which would seem to violate the law of conservation of mass.

According to the law of conservation of mass, during any physical or chemical changes, the total mass of the products is equal to the total mass of the reactants. Here conservation of mass is not obeyed as certain part of mass is converted into energy. So, law of conservation of mass is violated here.

On one hand, there is no known way, given the particles and their interactions in the Universe, to make more matter than antimatter. This creation-and-annihilation process, which obeys E = mc^2, is the only known way to create and destroy matter or antimatter.

This is called the Law of Conservation of Matter. It states that matter can never be created or destroyed, only changed and rearranged. They may be bonded into different molecules, or in a different state of matter, but they cannot disappear. When changes occur, energy is often transformed.

For any type of energy to be converted to mass, a nuclear reaction (or something similar) is required that absorbs energy and releases a particle that has rest mass. This is called rest-mass energy. This conversion deals with very small amounts of mass and comparitively large amounts of energy.

In “traditional” quantum mechanics, energy does not have mass, but there is an equivalency. Equivalency does not have to be sameness. Everything can be explained that way, and a particle that can only exist at v = c does not have to have any rest mass. It can still have momentum at v = c.