Formula Kimia (4)

The meaning of Al2O3

The subscript number shows that two atoms of aluminium combine with three atoms of oxygen

The meaning of NH3

The subscript number shows that one atoms of nitrogen combine with three atoms of hydrogen

The meaning of ZnCl2

The subscript number shows that one atoms of zinc combine with two atoms of chlorine

The subscript number 1

Need not be written in a chemical formula

Two types of chemical formulae

Namely the empirical formula and the molecular formula

The empirical formula

Is the chemical formula that shows the simplest ratio of the number of atoms of each element in a compound

The molecular formula

Is the chemical formula that shows the actual number of atoms of each element found in a molecule of a compound

The difference between the empirical formula and the molecular formula

Molecular formula of glucose

C₆H₁₂O₆

Empirical formula of glucose

CH₂O