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, mass is neither created nor destroyed during a chemical reaction; it is conserved.

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What is a subscript in a chemical formula?

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A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

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What is a coefficient in a chemical equation?

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A coefficient is a number placed in front of a chemical formula in a reaction to indicate how many molecules or moles of that substance are involved.

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If 50g of reactants are used in a reaction, what is the total mass of the products?

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50g of products, according to the Law of Conservation of Mass.

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What does it mean when a chemical equation is balanced?

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A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

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What happens to matter during a chemical reaction?

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Matter is transformed or changed; it is not created or destroyed.

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What is an example of a balanced chemical equation?

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4Al + 3O₂ → 2Al₂O₃ is a balanced equation.

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What is the difference between reactants and products in a chemical reaction?

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Reactants are the starting substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

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What is the significance of the coefficients in a balanced equation?

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Coefficients indicate the relative amounts of reactants and products involved in the reaction.

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How can you tell if a chemical equation is unbalanced?

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If the number of atoms of any element is different on the reactant side compared to the product side, the equation is unbalanced.