Chemical Reactions

Front

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.

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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.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.

Front

What are products in a chemical equation?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

What do coefficients in a chemical equation represent?

Back

Coefficients indicate the number of molecules of each reactant and product involved in the reaction.

Front

Give an example of a physical change.

Back

Mowing the lawn is an example of a physical change.

Front

Give an example of a chemical change.

Back

Baking cookies is an example of a chemical change.

Front

What is the law of conservation of mass?

Back

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

Front

What is a phase change?

Back

A phase change is a transition of matter from one state to another, such as solid to liquid or liquid to gas.

Front

What is combustion?

Back

Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.