Chemical Formulas

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.

Front

What do the subscripts in a chemical formula represent?

Back

Subscripts in a chemical formula indicate the number of atoms of each element present in a molecule.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H₂O, indicating it contains 2 hydrogen atoms and 1 oxygen atom.

Front

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

Back

To determine the total number of atoms, add the subscripts of all elements in the formula.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO₂, which means it has 1 carbon atom and 2 oxygen atoms.

Front

What elements are present in the formula C₆H₁₂O₆?

Back

The formula C₆H₁₂O₆ contains carbon (C), hydrogen (H), and oxygen (O).

Front

How many atoms of hydrogen are in the formula C₃H₇NO₂?

Back

There are 7 hydrogen atoms in the formula C₃H₇NO₂.

Front

What is the significance of parentheses in chemical formulas?

Back

Parentheses in chemical formulas indicate that the enclosed group of atoms is a repeating unit, and the subscript outside the parentheses applies to all atoms inside.

Front

What is the chemical formula for sulfuric acid?

Back

The chemical formula for sulfuric acid is H₂SO₄.

Front

How many oxygen atoms are in the formula H₂SO₄?

Back

There are 4 oxygen atoms in the formula H₂SO₄.