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 does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element that are present in one molecule of the compound.

Front

In the formula SO₃, how many oxygen atoms are there?

Back

3

Front

In the formula CaCl₂, how many chlorine atoms are there?

Back

2

Front

In the formula CaCl₂, how many calcium atoms are there?

Back

1

Front

What is the formula for caffeine?

Back

C₈H₁₀N₄O₂.

Front

How many different elements are in caffeine (C₈H₁₀N₄O₂)?

Back

4

Front

What is the total number of atoms in the molecule SO₃?

Back

4 (1 sulfur atom and 3 oxygen atoms).

Front

What does the formula CaCl₂ represent?

Back

Calcium chloride, a compound made of calcium and chlorine.

Front

What is the significance of the chemical formula in chemistry?

Back

It provides essential information about the composition and structure of a chemical compound.