Question

A student claims that the given chemical reaction will conserve mass.

Na2SO4 + BaCl2 BaSO4+ 2NaCl
Which evidence supports the claim?
A. The same elements are present in the reactants and products.
B. The number of atoms of each type of element is the same on both sides of the reaction.
C. The number of compounds of reactants and products is the same on both sides of the reaction.
D. The chemical reaction can occur in reverse direction after the products are formed.

Answer 1

The evidence that supports the claim that the given chemical reaction will conserve mass is that the number of atoms of each type of element is the same on both sides of the reaction.

Step-by-step explanation:

In chemical reactions, the components of the reactants—the elements involved and the number of atoms of each—are all present in the product(s). This is because chemical reactions are governed by the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.

Furthermore, a balanced chemical equation shows that the number of atoms of each type of element is the same on both sides of the reaction. Therefore, the evidence that supports the claim that the given chemical reaction will conserve mass is option B.