Law of Conservation of Matter Pretest

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that matter is conserved.

Front

What does the symbol '→' represent in a chemical equation?

Back

The symbol '→' indicates the direction of the reaction, showing that reactants are transformed into products.

Front

What are reactants in a chemical reaction?

Back

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

Front

What are products in a chemical reaction?

Back

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

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients in front of the compounds to ensure the same number of each type of atom on both sides.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of each substance involved in the reaction.

Front

What is the balanced equation for the formation of ammonia from hydrogen and nitrogen?

Back

The balanced equation is @@3H_2 + N_2 ightarrow 2NH_3@@.

Front

What does it mean if a chemical equation is unbalanced?

Back

An unbalanced chemical equation does not have the same number of each type of atom on both sides, violating the Law of Conservation of Matter.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.