The molecular formula is the true formula representing the total number of atoms of each element present in one molecule of a compound. It is entirely possible that two or more substances will have the same percent composition, yet be distinctly different compounds.
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule. Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element’s symbol.
Molecular Formula is defined as "the formula that shows the actual number of each kind of atom in a molecule."
The Molecular Formula
is calculated from the empirical formula when the molar mass is known.
The Molecular Formula is the true formula representing the total number of atoms of each element present in one molecule of the compound.
Often the molecular formula is the same as the empirical formula. If the molecular formula is not the same, it will be an integral multiple of the empirical formula.