Here's the breakdown:

* Brutto Formula: This simply shows the types of atoms present in a molecule and their respective numbers. It doesn't indicate how these atoms are connected or arranged.

* Example: The brutto formula for glucose is C6H12O6.

* Molecular Formula: This gives the exact number of each type of atom in a molecule. It reflects the true composition and structure of the molecule.

* Example: The molecular formula for glucose is also C6H12O6.

Key Differences:

* Structure: Brutto formulas don't show structure, while molecular formulas do.

* Isomers: Different molecules with the same brutto formula but different arrangements of atoms are called isomers. They have different molecular formulas.

In summary:

* Brutto formula: Gives the elemental composition (what atoms are present and how many).

* Molecular formula: Gives the exact composition and structure of a molecule.

The two formulas are identical for simple molecules like glucose. However, for more complex molecules with isomers, they can be different.