Who proposed the law of conservation of mass

Nobody brought it up! It is summed up by the working people in the practice of labor, study, and life over a long period of time, and a truth that cannot be proved is like an axiom in mathematics, and is the premise for proving other laws

The law of conservation of mass states that in a chemical reaction, the sum of the substances participating in the reaction is equal to the sum of the substances produced after the reaction.

Microscopic explanation: Before and after a chemical reaction, the type, number, and mass of atoms remain the same. Six unchanged:

1. The total mass of the substance before and after the reaction remains unchanged. 2. The type of element remains unchanged. 3. The total mass of each element remains unchanged.

4. The type of atom remains unchanged. 5. The number of atoms remains the same. 6. The mass of the atom does not change.

The law of conservation of mass is one of the fundamental laws that prevail in nature. This law states that for any system where matter and energy are transferred in its entirety, the mass of the system must remain constant over time, because the mass of the system cannot be changed, increased or eliminated. As a result, the quality remains the same over time.

This law implies that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may change formally, such as in a chemical reaction, where the mass of the chemical composition before the reaction is equal to the mass of the component after the reaction.

The law of conservation of mass, proposed by Albert Einstein, mainly refers to the fact that the sum of relativistic static and kinetic energy of all particles in an isolated system remains unchanged during interaction. The law of conservation of mass and energy fully reflects the unity of matter and motion.

In classical physics, the law of conservation of mass and the law of conservation of energy are completely independent of each other. Because the value of mass is not determined by the value of energy, and the value of energy is not determined by the value of mass. And there is also the case that when the system interacts with the outside world, from the point of view of classical physics, the energy of the system is not conserved, but the mass can be conserved.

The idea of the law of conservation of energy was first developed by the German physicist JMeyer proposed it in 1842 on the basis of experiments. After this the British physicist J

Joule has done a lot of experiments to find the thermal work equivalent in various ways, and found that the results obtained are all consistent, that is, there is a certain conversion relationship between heat and work.

The law of conservation of energy is one of the most common and important fundamental laws of nature. From physics and chemistry to geology and biology, to cosmic celestial bodies. As small as the inside of the atomic nucleus, as long as there is energy transformation, it must obey the law of energy conservation.

From daily life to scientific research and engineering technology, this law plays an important role. Human beings' utilization of various energies, such as coal, oil and other fuels, as well as hydropower, wind energy, nuclear energy, etc., is achieved through energy conversion. The law of conservation of energy is a powerful way for people to understand and use nature.

One of the fundamental laws of nature. In any system of matter that is isolated from its surroundings (an isolated system), its total mass remains the same regardless of the changes or processes that occur. In the 18th century, after the French chemist Lavoisier experimentally overturned the phlogiston theory, this law was recognized.

Since the beginning of the 20th century, it has been found that the mass of high-speed moving objects changes with its velocity, and it has been found that the physical object and the field can be converted into each other, so the mass of the field should be considered according to the mass-energy relationship. The development of the concept of mass has led to a new development of the principle of conservation of mass, and the two laws of conservation of mass and energy have been merged into one conservation law through the relationship between mass and energy, that is, the law of conservation of mass and energy.

In the 20th century, Albert Einstein deduced the special theory of relativity, pointing out that the mass of matter is proportional to its energy, which can be expressed by the following formula: e=mc2 where e is energy; m is the mass; c is the speed of light. The above formula shows that matter can be converted into radiant energy, and radiant energy can also be converted into matter.

This phenomenon does not mean that matter will be destroyed, but that the static mass of matter will be transformed into another form of motion. (Due to the limitations of science at that time, this law was only verified in the microscopic world, and later in nuclear tests) So after the 20th century, this law has developed into the law of conservation of mass and the law of conservation of energy, collectively known as the law of conservation of mass and energy.

The sum of the masses of the substances participating in the reaction is equal to the sum of the masses of the substances formed after the reaction, and this law is called the law of conservation of mass

Therefore, the answer is: the sum of the masses of the substances participating in the reaction is equal to the sum of the masses of the substances produced by the reaction after the reaction