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 coefficient represent in a chemical formula?

Back

A coefficient indicates the number of molecules or moles of a substance in a chemical reaction.

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How do you determine the number of atoms of an element in a compound?

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To find the number of atoms of an element in a compound, multiply the coefficient by the subscript of that element.

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What are reactants in a chemical equation?

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

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What are products in a chemical equation?

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

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In the compound 4NH₃, how many total hydrogen atoms are present?

Back

There are 12 hydrogen atoms in 4NH₃ (4 x 3 = 12).

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What is a subscript in a chemical formula?

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A subscript indicates the number of atoms of an element in a molecule.

Front

How many nitrogen atoms are in the compound 4NH₃?

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There are 4 nitrogen atoms in 4NH₃.

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What is the difference between a coefficient and a subscript?

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A coefficient indicates the number of molecules, while a subscript indicates the number of atoms of an element in a molecule.

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What is the significance of balancing a chemical equation?

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Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides, adhering to the Law of Conservation of Mass.