Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it can only be transformed or rearranged.

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What happens to matter during a chemical reaction?

Back

During a chemical reaction, the total mass of the reactants equals the total mass of the products, meaning matter is conserved.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

In the equation 2NaHCO3 -> Na2CO3 + CO2 + H2O, what is the reactant?

Back

NaHCO3 is the reactant in this equation.

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What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

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How can mass decrease in a chemical reaction?

Back

Mass can decrease if some particles escape as gases during the reaction.

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

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A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

How many atoms of Calcium are in 3Ca(OH)2?

Back

There are 3 atoms of Calcium in 3Ca(OH)2.

Front

What is the significance of balancing chemical equations?

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Balancing chemical equations ensures that the Law of Conservation of Mass is upheld, showing that mass is conserved.

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What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.