Question

Which statement about a chemical reaction supports the claim that mass is conserved?(1 point)
Responses

The reactants and products have the same number of elements.
The reactants and products have the same number of elements.

The reactants and products have the same number of molecules of the same elements.
The reactants and products have the same number of molecules of the same elements.

The reactants and products have the same number of atoms of the same elements.
The reactants and products have the same number of atoms of the same elements.

The reactants and products have the same number of substances.
The reactants and products have the same number of substances.

Answer 1

The reactants and products have the same number of atoms of the same elements.

Explanation: Conservation of mass requires each element's atoms to be neither created nor destroyed in a chemical reaction, so the total number of atoms of each element is the same before and after.