Chemical Reactions and Moles

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What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. Example: Rusting of iron.

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What is the boiling point?

Back

The boiling point is the temperature at which a liquid changes to a gas.

Front

What happens to atoms during a chemical reaction?

Back

During a chemical reaction, atoms are rearranged to form new substances.

Front

What is a physical change?

Back

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

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

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What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not change the chemical composition of the substance.

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What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

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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 law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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What is an example of a chemical reaction?

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An example of a chemical reaction is the combustion of gasoline in a car engine.