define =1.conservation of momentum
2.conservation of mass
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1. Law of conservation of momentum is a result of Newton's third law of motion. According to this law, the total momentum of a system of objects remains conserved before and after their interaction or collision provided that there is no external unbalanced force acting on them.
2.It states, mass can neither be created nor be destroyed during a chemical reaction." This means that in any chemical reaction, the total mass of the reactants is equal to the total mass of the products and there is no change in mass during the chemical reaction. It is also known as law of indestructibility of matter.
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