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. Mass cannot be created or destroyed.

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What does it mean for a chemical reaction to be balanced?

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A chemical reaction is balanced when the number of atoms of each element is the same on both the reactant and product sides.

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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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Which of the following substances cannot be broken down into simpler substances: Na, H2O, C6H12O6, CO?

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Na (Sodium) cannot be broken down into simpler substances.

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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 an equation to indicate how many molecules or moles of that substance are involved.

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What is the difference between a reactant and a product in a chemical reaction?

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

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How do you determine the number of atoms in a molecule from its chemical formula?

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Count the number of each type of atom represented by the chemical symbols and their corresponding subscripts in the formula.

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What is the significance of balancing a chemical equation?

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Balancing a chemical equation ensures that the Law of Conservation of Mass is upheld, meaning that matter is neither created nor destroyed during the reaction.

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What is an example of a balanced chemical equation?

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An example of a balanced chemical equation is: @@2H_2 + O_2 ightarrow 2H_2O@@.