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What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What are reactants in a chemical equation?

Back

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

Front

What are products in a chemical equation?

Back

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

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What does a subscript in a chemical formula indicate?

Back

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

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How do you calculate the total mass of reactants in a chemical reaction?

Back

The total mass of reactants is calculated by adding the masses of all reactants before the reaction occurs.

Front

If the total mass of products is 84 g, what is the total mass of reactants?

Back

According to the Law of Conservation of Mass, the total mass of reactants must also be 84 g.

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What is the significance of balancing a chemical equation?

Back

Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides of the equation, reflecting the conservation of mass.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.

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How do you determine the mass of a reactant if the mass of products is known?

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You can determine the mass of a reactant by subtracting the known masses of other reactants from the total mass of products.

Front

What is the formula for calculating the mass of a compound?

Back

The mass of a compound can be calculated by summing the masses of its constituent elements multiplied by their respective subscripts.