When 50g of na is reacted with 22g of ci, 72g of product is yielded. nacl is created
in this reaction. explain why this is true?

This is true because according to the law of conservation of mass in chemical equation the mass of reactants should be equal to the mass of products.

Explanation:A chemical equation contains reactants and products.In this case, the reactants are sodium(Na) and chlorine gas(Cl), while the product is sodium chloride, NaCl.The equation for the reaction is;

2Na(s) + Cl₂(g) → 2NaCl(s)

According to the law of conservation of mass, the mass of reactants should be equal to the mass of products in a chemical reactions.Therefore, Mass of Na + Mass of Cl  = Mass of NaCl Sum of mass of Na and mass of Cl = 72 g, while The mass of NaCl = 72 g This explains why the sum of mass of Na and Cl is equal to the mass of NaCl.