Question

Conservation in Chemical Reactions Quick Check
2 of 42 of 4 Items
Question
Which statement is true regarding a chemical reaction?(1 point)
Responses

Even if the total number of atoms does not change, mass may not be conserved in the reaction.
Even if the total number of atoms does not change, mass may not be conserved in the reaction.

Even if the total number of atoms changes, mass may not be conserved in the reaction.
Even if the total number of atoms changes, mass may not be conserved in the reaction.

The total number of atoms does not change, so mass is conserved in the reaction.
The total number of atoms does not change, so mass is conserved in the reaction.

The total number of atoms changes, so mass is conserved in the reaction.
The total number of atoms changes, so mass is conserved in the reaction.
Skip to navigation

Answer 1

The correct statement regarding a chemical reaction is:

**The total number of atoms does not change, so mass is conserved in the reaction.**

According to the Law of Conservation of Mass, in a closed system, the mass of the reactants equals the mass of the products, meaning that the total number of atoms before and after a reaction remains unchanged, and thus mass is conserved.