Which statement is true regarding a chemical reaction?

Question

(1 point)
Even if the total number of atoms does
not change, mass may not be conserved
in the reaction.
The total number of atoms changes, so
mass is 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.

Answer 1

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