Balancing chemical equations

Front

What is the Law of Conservation of Mass?

Back

It states that no matter can be created or destroyed.

Front

Balance this equation: HgO ---> 2Hg + O₂

Back

2HgO ---> 2Hg + O₂

Front

Balance this equation: H₂ + Cl₂ ---> HCl

Back

H₂ + Cl₂ ---> 2HCl

Front

Is the following equation balanced? Al + O₂ ---> 2Al₂O₃

Back

NO

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of molecules.

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol indicating the number of atoms of that element.