Intro to Balancing Equations

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products.

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 mass is conserved.

Front

What does a coefficient in a chemical equation represent?

Back

A coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of an element in a molecule.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

What is the purpose of balancing chemical equations?

Back

The purpose of balancing chemical equations is to reflect the conservation of mass and to accurately represent the quantities of reactants and products.

Front

In the equation 2H2 + O2 -> 2H2O, how many hydrogen atoms are present on each side?

Back

There are 4 hydrogen atoms on each side of the equation.

Front

In the equation 4Al + 3O2 -> 2Al2O3, how many oxygen atoms are present on each side?

Back

There are 6 oxygen atoms on each side of the equation.

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.

Front

What is the significance of the number '2' in 2H2O?

Back

The '2' indicates that there are 2 molecules of water (H2O) in the reaction.