Chemical Reactions and Balancing Equations

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 moles of that substance are involved in the reaction.

Front

What are reactants in a chemical reaction?

Back

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

Front

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 the Law of Conservation of Mass state?

Back

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

Front

In the equation 2H₂ + O₂ → 2H₂O, what are the reactants?

Back

The reactants are 2H₂ (hydrogen) and O₂ (oxygen).

Front

In the equation 2H₂ + O₂ → 2H₂O, what is the product?

Back

The product is 2H₂O (water).

Front

What is a subscript in a chemical formula?

Back

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

Front

What is the difference between a reactant and a product?

Back

A reactant is a substance that starts a chemical reaction, while a product is a substance that is formed as a result of the reaction.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

Why is it important to balance chemical equations?

Back

It is important to balance chemical equations to comply with the Law of Conservation of Mass, ensuring that mass is conserved during the reaction.