Balancing Chemical Equations

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What is a balanced chemical equation?

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

Tags

NGSS.MS-PS1-5

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What does it mean when a chemical reaction is said to be 'closed'?

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A closed chemical reaction occurs in a sealed container where no matter can enter or leave, ensuring that the mass remains constant.

Tags

NGSS.MS-PS1-5

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What is the law of conservation of mass?

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The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-5

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What is a physical change?

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

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NGSS.MS-PS3-4

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What is a chemical change?

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A chemical change occurs when substances combine or break apart to form new substances with different properties.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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What is the role of coefficients in a chemical equation?

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Coefficients are numbers placed before compounds in a chemical equation to indicate the number of molecules or moles of that substance involved in the reaction.

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What is the difference between reactants and products?

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

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

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How do you determine if a chemical equation is balanced?

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To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation and ensure they are equal.

Tags

NGSS.MS-PS1-5

Front

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

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The mass of the system remains constant during a chemical reaction in a closed container, as no mass is lost or gained.

Tags

NGSS.MS-PS1-5

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What is an example of a physical change?

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An example of a physical change is the melting of ice into water, where the substance remains H2O but changes state.

Tags

NGSS.MS-PS1-4