* Avogadro's Number: One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.). This is known as Avogadro's number.

* Molecules to Atoms: Since each molecule has 5 atoms, we need to multiply Avogadro's number by 5 to find the total number of atoms.

Calculation:

(6.022 x 10^23 molecules/mole) * (5 atoms/molecule) = 3.011 x 10^24 atoms

Therefore, there are 3.011 x 10^24 atoms in 1.00 mole of molecules if each molecule contains 5 atoms.