Counting Atoms

Front

What are the reactants in the reaction 2H₂ + O₂ → 2H₂O?

Back

The reactants are 2H₂ + O₂.

Front

How many Sodium (Na) atoms are in the compound 6NaCl?

Back

There are 6 Sodium (Na) atoms.

Front

How many Oxygen (O) atoms are in Al₂(SO₄)₃?

Back

There are 12 Oxygen (O) atoms.

Front

How many Nitrogen (N) atoms are in the compound (NH₄)₂CrO₄?

Back

There are 2 Nitrogen (N) atoms.

Front

What is the definition of a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is the definition of a product in a chemical reaction?

Back

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

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the coefficients and subscripts in the formula.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient represents the number of molecules or moles of a substance.

Front

In the formula Ca(OH)₂, how many Oxygen (O) atoms are present?

Back

There are 2 Oxygen (O) atoms.

Front

What is the total number of atoms in the compound C₆H₁₂O₆?

Back

There are 24 total atoms (6 Carbon, 12 Hydrogen, 6 Oxygen).