Balancing Chemical Equations

Front

What does the principle of conservation of mass mean in chemical reactions?

Back

Matter is not created or destroyed.

Front

How many oxygen atoms are present in 4Ca(OH)₂?

Back

8

Front

What is used to represent the amount of each atom in a molecule?

Back

Subscript

Front

What number should go in the blank for the equation Al(NO₃)₃ + _ NaOH -> Al(OH)₃ + 3 NaNO₃?

Back

3

Front

What physical state symbol should be included for water?

Back

(l) - liquid

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Front

What does a coefficient in a chemical equation indicate?

Back

The number of molecules or moles of a substance.

Front

What is the difference between a subscript and a coefficient?

Back

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