Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

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 an Open System?

Back

An Open System is a type of system that allows matter and energy to flow freely in and out.

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What is a Closed System?

Back

A Closed System is a type of system that does not allow matter to enter or leave, but can exchange energy.

Front

If a chemical reaction starts with 30g of reactants, what is the total mass of the products?

Back

30g of products.

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

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What is a Coefficient in a chemical equation?

Back

A Coefficient is a number placed in front of a compound or element in a chemical equation to indicate how many molecules or moles are involved.

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What is a Subscript in a chemical formula?

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A Subscript is a small number written to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

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What is the difference between mass and weight?

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Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the reactants remains constant and is equal to the mass of the products.

Front

What is an example of a chemical reaction in an Open System?

Back

Burning wood in an open fireplace is an example of an Open System, as gases and ash are released into the environment.