Flashcard on the Law of Conservation of Mass

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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 total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction.

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NGSS.MS-PS1-5

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What type of reaction is also known as redox?

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Oxidation-reduction (redox) reactions involve the transfer of electrons between substances, resulting in changes in oxidation states.

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

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A balanced chemical reaction has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

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NGSS.MS-PS1-5

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What is an indicator of a chemical change?

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Indicators of a chemical change include the formation of gas bubbles, color change, temperature change, and the formation of a precipitate.

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What happens to the total mass in a closed container during a chemical reaction?

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The total mass remains the same before and after the reaction.

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What is an example of a physical change?

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Melting of ice is a physical change where the state of matter changes from solid to liquid without altering the chemical composition.

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What is an example of a chemical change?

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The burning of wood is a chemical change that produces new substances, such as ash and gases.

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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 matter is neither created nor destroyed in a chemical reaction.

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What is an endothermic reaction?

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An endothermic reaction is a process that absorbs heat from the surroundings, such as the melting of ice.

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What is an exothermic reaction?

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An exothermic reaction is a process that releases heat to the surroundings, such as combustion.

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