Question

what is law of conservation of mass? who proposed law of conservation of mass ​

Answer 1

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Answer 2

Explanation Of The Law Of Conservation Of Mass:

• What is the law of conservation of mass ? This law states that in a chemical reaction matter can be neither created nor be destroyed. The mass of the reactants is equal to the mass of the products.

• This law was proposed by Antoine Lavoisier in 1789. Even when a matter undergoes physical change the mass is not lost. Example when the ice which is the solid form of water is converted to liquid state of water the mass is conserved there would be no change in the volume of water it would still be the same as it was when it was in the form of ice.

• In a chemical reaction too this law is applicable. Example we can take the example of the chemical reaction of water. 2H2 + O2 -------> 2H20

• In this reaction we can clearly see that the equation is balanced the mass of the reactants is equal to the mass of the products.

• It is because of the law of conservation of mass that all the  equations that are written must be balanced or else the equation will be incorrect and will be said as an unbalanced equation.