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.

Front

How do you identify the number of oxygen atoms in a chemical formula?

Back

Count the subscript number next to the oxygen symbol (O). If there is no subscript, it means there is one oxygen atom.

Front

What is mass?

Back

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

Front

What evidence supports the Law of Conservation of Mass in a chemical reaction?

Back

The total mass of the reactants before the reaction equals the total mass of the products after the reaction.

Front

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 atoms are involved.

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What is a subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

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

Back

The total mass remains constant; it does not change before and after the reaction.

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What is the difference between mass and weight?

Back

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

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How can you demonstrate the Law of Conservation of Mass using baking soda and vinegar?

Back

By measuring the mass of baking soda and vinegar before the reaction and comparing it to the mass of the products after the reaction.

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What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into new substances (products) with different properties.