Balancing Chemical Equations

Front

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

How do you balance a chemical equation?

Back

To balance a chemical equation, ensure that the number of atoms of each element is the same on both sides of the equation by adjusting coefficients.

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What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What is a reactant in a chemical reaction?

Back

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

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What is a product in a chemical reaction?

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

Front

What does it mean to say a chemical equation is balanced?

Back

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 is the significance of coefficients in a chemical equation?

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Coefficients indicate the number of molecules or moles of a substance involved in a reaction and are used to balance the equation.

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What is the total number of atoms in the equation: 2H2 + O2 → 2H2O?

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There are 6 atoms in total: 4 hydrogen atoms and 2 oxygen atoms.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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What is the role of oxygen in combustion reactions?

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Oxygen acts as a reactant in combustion reactions, reacting with a fuel to produce heat, light, and new products, typically carbon dioxide and water.