Multiple Choice
According to the Law of Conservation of Mass, what should the total mass of the jar and its contents be after the candle goes out in a closed system?
2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
According to the Law of Conservation of Mass, what is conserved in every chemical reaction?
A
Number of molecules
B
Volume
C
Mass
D
Energy
Verified step by step guidance1
Understand the Law of Conservation of Mass: It states that mass is neither created nor destroyed in a chemical reaction.
Recognize that this means the total mass of the reactants equals the total mass of the products.
Note that the number of molecules can change due to rearrangement of atoms, so it is not necessarily conserved.
Volume can change depending on the state of substances and reaction conditions, so it is not conserved.
Energy can be absorbed or released during reactions, so it is not conserved as mass is; therefore, mass is the conserved quantity.
Related Videos
Related Practice
