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 mass is neither created nor destroyed in a chemical reaction; it remains constant.

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What does a subscript in a chemical formula indicate?

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A subscript indicates the number of atoms of an element in a molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

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What does a coefficient in a chemical equation represent?

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A coefficient indicates the number of molecules or moles of a substance involved in a reaction. For example, in 2H2 + O2 -> 2H2O, the '2' before H2O indicates two water molecules are produced.

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How can you tell if a chemical equation is balanced?

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A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

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What are reactants in a chemical reaction?

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Reactants are the starting substances in a chemical reaction that undergo change to form products.

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What are products in a chemical reaction?

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Products are the substances formed as a result of a chemical reaction.

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What is the significance of balancing chemical equations?

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Balancing chemical equations is important because it reflects the Law of Conservation of Mass, ensuring that mass is conserved during the reaction.

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What does it mean if an equation is unbalanced?

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An unbalanced equation indicates that the number of atoms of one or more elements is not the same on both sides, violating the Law of Conservation of Mass.

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What is the role of coefficients in balancing equations?

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Coefficients are used to adjust the number of molecules of reactants and products to achieve balance in a chemical equation.

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What is an example of a balanced chemical equation?

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An example of a balanced equation is: 2H2 + O2 -> 2H2O.