"}Just realized the “mole” in “molecular” was probably the same one as moles, like the Avogadro’s number unit
The name mole is an 1897 translation of the German unit Mol, coined by the chemist Wilhelm Ostwald in 1894 from the German word Molek\u00fcl (molecule).[9][10][11]
Correct, and also:
molecule (n.)
1794, “extremely minute particle,” from French mol\u00e9cule (1670s), from Modern Latin molecula, diminutive of Latin moles “mass, barrier” (see mole (n.3)). For ending see -cule. It has a vague meaning at first; the vogue for the word (used until late 18c. only in Latin form) can be traced to the philosophy of Descartes. First used of Modern Latin molecula in modern scientific sense (“smallest part into which a substance can be divided without destroying its chemical character”) is by Amedeo Avogadro (1811).