The Law of Conservation of Mass

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What is the Law of Conservation of Mass?

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The Law of Conservation of Mass states that in a closed system, the total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction. Matter cannot be created or destroyed.

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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

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A balanced chemical equation shows that the total number of atoms of each element is the same on both sides of the equation, indicating that mass is conserved during the reaction.

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If a chemical reaction starts with 20g of reactants, what is the total mass of the products?

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The total mass of the products will also be 20g, according to the Law of Conservation of Mass.

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What happens to the mass of a substance during a chemical reaction in a closed system?

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The mass of the substance remains constant; it does not change during the reaction.

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What is a reactant in a chemical reaction?

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A reactant is a substance that undergoes a chemical change during a reaction.

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What is a product in a chemical reaction?

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A product is a substance that is formed as a result of a chemical reaction.

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Why is it important to balance chemical equations?

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Balancing chemical equations is important to ensure that the Law of Conservation of Mass is upheld, meaning that the number of atoms of each element is the same on both sides of the equation.

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