Question

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed.


Which of the following is true about the atoms involved in a chemical reaction?
A.
The total mass of the atoms involved in a chemical reaction always changes as the atoms are rearranged into new molecules.
B.
The total mass of the atoms involved in a chemical reaction will stay the same no matter how the atoms are rearranged.
C.
The total mass of the atoms involved in a chemical reaction will increase if a new compound is formed during the reaction.
D.
The total mass of the atoms involved in a chemical reaction will decrease if two molecules combine to form one single compound.

Answer 1

B.
The total mass of the atoms involved in a chemical reaction will stay the same no matter how the atoms are rearranged.