Molecular Formulas

Front

What is a molecular formula?

Back

A molecular formula shows the number and types of atoms in a molecule, using chemical symbols and subscripts.

Front

What does the subscript in a molecular formula indicate?

Back

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

Front

What does the coefficient in a molecular formula represent?

Back

The coefficient represents the number of molecules or moles of the compound.

Front

What is the molecular formula for water?

Back

H₂O, which means there are 2 hydrogen atoms and 1 oxygen atom.

Front

How many total atoms are in the molecular formula C₆H₁₂O₆?

Back

There are 24 total atoms (6 carbon, 12 hydrogen, 6 oxygen).

Front

What is the symbol for the element oxygen?

Back

O

Front

What is the difference between a reactant and a product in a chemical reaction?

Back

Reactants are substances that start a chemical reaction, while products are substances formed as a result of the reaction.

Front

What is an example of a chemical change?

Back

Burning sugar, which gives off an odor and changes color.

Front

What does it mean if a molecule is polar?

Back

A polar molecule has a partial positive charge on one side and a partial negative charge on the other, due to uneven distribution of electrons.

Front

What is the molecular formula for carbon dioxide?

Back

CO₂, which means there is 1 carbon atom and 2 oxygen atoms.