Law of Conservation of Mass

Front

What does the coefficient in a chemical formula represent?

Back

The coefficient indicates the number of molecules of the substance present.

Front

In the chemical formula 3H₂O, what does the '3' signify?

Back

It signifies that there are 3 molecules of water.

Front

What are the reactants in a chemical equation?

Back

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

Front

What are the products in a chemical equation?

Back

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

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

How can you tell if a chemical equation is balanced?

Back

A chemical equation is balanced if the number of atoms of each element is the same on both sides of the equation.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation.

Front

How many hydrogen atoms are in the molecule C₂H₆?

Back

There are 6 hydrogen atoms in C₂H₆.

Front

What is the significance of the subscript in a chemical formula?

Back

The subscript indicates the number of atoms of the element in one molecule of the compound.

Front

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

Back

The reactants are 2H₂ and O₂.