Answer:
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.
