Question Video: Identifying Which Particle Diagram Shows the Law of Conservation of Mass Being Preserved | Nagwa Question Video: Identifying Which Particle Diagram Shows the Law of Conservation of Mass Being Preserved | Nagwa

# Question Video: Identifying Which Particle Diagram Shows the Law of Conservation of Mass Being Preserved Science • First Year of Preparatory School

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Which of the following particle diagrams shows the law of conservation of mass being preserved? [A] Diagram A [B] Diagram B [C] Diagram C [D] Diagram D [E] Diagram E

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### Video Transcript

Which of the following particle diagrams shows the law of conservation of mass being preserved?

The law of conservation of mass states that mass cannot be created or destroyed during a chemical reaction. To answer this question, we need to determine which of the particle diagrams shows the law of conservation of mass being preserved. Each of the particle diagrams represents a chemical reaction. The left-hand side of the arrow represents the reactants, and the right-hand side of the arrow represents the products. In order for the law of conservation of mass to be preserved, the mass of the reactants must equal the mass of the products as mass cannot be created or destroyed during a chemical reaction.

Since we don’t know the mass of the particles, we’ll have to look at this question another way. Instead of comparing the masses of the particles, we’ll compare the number and type of particles on each side of the arrow. If the number and type of particles are the same on both sides of the arrow, then the law of conservation of mass is preserved. Let’s go through each of the answer choices, counting the number of orange, blue, red, and white particles on each side of the arrow.

In answer choice (A), there’s one orange particle, one blue particle, three red particles, and one white particle on the left-hand side of the arrow. On the right-hand side of the arrow, there’s one orange particle, two blue particles, six red particles, and one white particle. There’s the same number of orange and white particles on both sides of the arrow, but the number of blue and red particles is not the same. So this particle diagram does not show the law of conservation of mass being preserved and cannot be the answer to the question.

In answer choice (B), there are the same number of orange, blue, and red particles on both sides of the arrow. But there are two white particles on the left-hand side of the arrow and no white particles on the right-hand side of the arrow. This means that answer choice (B) cannot be the answer to the question.

In answer choice (C), there’s the same number of all of the particles on both sides of the equation except for the white particles. Once again, the diagram does not show the law of conservation of mass being preserved.

In answer choice (D), we see one orange particle, two blue particles, six red particles, and two white particles on both sides of the arrow. The number and type of particles are the same on both sides of the arrow. So this diagram does show the law of conservation of mass being preserved. But to be sure that this is the correct answer, let’s take a look at answer choice (E).

In answer choice (E), the number of orange, blue, and red particles is the same on both sides of the arrow, but the number of white particles is different. Therefore, this diagram does not show the law of conservation of mass being preserved.

In conclusion, the particle diagram that shows the law of conservation of mass being preserved is the diagram shown in answer choice (D).

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