Multiple Choice
Which statement best explains how the existence of atoms supports the Law of Conservation of Mass?
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2. Atoms & Elements
Law of Conservation of Mass
Multiple Choice
Which of the following best demonstrates that matter is always conserved in a chemical reaction?
A
By ensuring the total mass of reactants equals the total mass of products
B
By measuring the temperature change during the reaction
C
By observing the color change of the substances involved
D
By calculating the energy released or absorbed in the reaction
Verified step by step guidance1
Understand the Law of Conservation of Matter, which states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.
Recognize that to demonstrate this law, one must show that the total amount of matter before and after the reaction remains the same.
Identify that measuring the total mass of reactants before the reaction and comparing it to the total mass of products after the reaction is the direct way to confirm matter conservation.
Note that other observations like temperature change, color change, or energy calculations do not directly measure the amount of matter and therefore do not demonstrate conservation of matter.
Conclude that the best demonstration of matter conservation is by ensuring the total mass of reactants equals the total mass of products.
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