Law of Conservation of Mass

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in a molecule.

Front

In the chemical formula 3H₂O, how many atoms of hydrogen are there?

Back

There are 6 atoms of hydrogen.

Front

What is the definition of a balanced chemical equation?

Back

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

Front

How many sulfur atoms are in the equation 2SO₂ + 2H₂O₂ → 2H₂SO₄?

Back

There are 2 sulfur atoms.

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

Identify the subscripts in the chemical formula 3Fe₂O₄.

Back

The subscripts are 2 and 4.

Front

What is the purpose of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a 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 and ensure they are equal.

Front

What is the significance of 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

In the equation 2H₂ + O₂ → 2H₂O, how many total atoms are present on the reactant side?

Back

There are 6 total atoms (4 hydrogen and 2 oxygen).