Chemical Reactions & Equations

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What is the Law of Conservation of Mass?

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The Law of Conservation of Mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.

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What is a balanced equation?

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A balanced equation is a chemical equation in which the number of atoms for each element is the same on both sides of the equation, ensuring that mass is conserved.

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What is an unbalanced equation?

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An unbalanced equation is a chemical equation where the number of atoms for each element is not the same on both sides, violating the Law of Conservation of Mass.

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What is a chemical reaction?

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A chemical reaction is a process that involves the transformation of one or more substances into different substances, characterized by the breaking and forming of chemical bonds.

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What is sublimation?

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Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.

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What is combustion?

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Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light, typically resulting in the formation of carbon dioxide and water.

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What happens to the mass of ice when it melts into water?

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The mass of ice remains the same when it melts into water; for example, 100 grams of ice will produce 100 grams of water.

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What is a reactant in a chemical reaction?

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A reactant is a substance that undergoes a change during a chemical reaction, starting the process.

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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.

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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 with different properties.