Where does “моле́кула” come from?

моле́кула (Russian) comes from French molécule, from New Latin molecula, from Latin mōlēs.

Ancestry of “моле́кула”, step by step

Step	Language	Word	Meaning
1	French	molécule	molecule
2	New Latin	molecula	a molecule; molecule
3	Latin	mōlēs	—

моле́кула — Etymology, Origin & Word History | Etymology Explorer