What would be the total mass of the products of a reaction in which 25 grams of table salt decomposes into the elements sodium and chlorine?

25 grams

Explanation:

By the law of conservation of mass, mass cannot either be created or destroyed.

Applied to chemical reactions, that means that the mass of producs formed from the chemical reaction is equal to the mass of the substances that reacted.

The given example of table salt is represented by this balanced chemical equaiton:

2NaCl (s) → 2Na (s) + Cl₂ (aq)

So, when 25 grams of NaCl (s) decomposes (reacts) 25 grams in total of products, Na (s) and Cl₂ (g), would be formed.