Front

What is a chemical equation?

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A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

What does it mean to balance a chemical equation?

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Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

What is the Law of Conservation of Mass?

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The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction.

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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 to indicate how many molecules or moles of that substance are involved in the reaction.

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What is a subscript in a chemical formula?

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A subscript is a small number written after an element symbol that indicates the number of atoms of that element in a molecule.

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How do you determine the number of atoms in a molecule?

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To determine the number of atoms in a molecule, add the subscripts of each element in the chemical formula.

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What is the difference between reactants and products in a chemical reaction?

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

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What is the significance of the arrow in a chemical equation?

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The arrow in a chemical equation indicates the direction of the reaction, showing that reactants are transformed into products.

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How can you tell if a chemical equation is balanced?

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A chemical equation is balanced if the number of atoms of each element is the same on both sides of the equation.

Front

What is the role of oxygen in combustion reactions?

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In combustion reactions, oxygen reacts with a fuel to produce energy, carbon dioxide, and water.