Chemical reactions and more

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products.

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What are products in a chemical reaction?

Back

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

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both the reactant and product sides.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is never created or destroyed in a chemical reaction.

Front

How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation; they must be equal.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are present.

Front

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.

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances, but they are not created or destroyed.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.