CHEMICAL REACTIONS CFU

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What is a chemical reaction?

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A process in which substances (reactants) undergo a transformation to form new substances (products).

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What are reactants in a chemical equation?

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The starting materials that undergo a chemical change to form products.

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What are products in a chemical equation?

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The substances that are formed as a result of a chemical reaction.

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What is a coefficient in a chemical equation?

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A number placed before a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

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What is the Law of Conservation of Mass?

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The principle stating that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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What is a physical change?

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A change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a chemical change?

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A change that results in the formation of new chemical substances.

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What is a catalyst?

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A substance that increases the rate of a chemical reaction without being consumed in the process.

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What is combustion?

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A chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.

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What is a balanced chemical equation?

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An equation in which the number of atoms for each element is the same on both sides of the equation.