Plz which scientific law does balancing chemical equations demonstrate?

The law which is being demonstrated by the balancing of the chemical equation is the mass conservational law.

Explanation:

The law of conservation of mass is signified when the chemical equations are balanced. While balancing the chemical equation, what we do is, the number of atom of an element is seen to be equal on the reaction as well as the product side.

So here the number of atom when balanced equal on either side shows the presence of that mass of the atom to be equal on either side and hence, the mass is conserved in the chemical reaction.

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.