Here are the rounded molar masses for a few elements in the game and according to google.
GAS LIQUID GOOGLE Ethanol 184 46 46 H2O 18 18 18 H 1 1 1 O2 16 16 16 CO2 44 44 44
As the molar mass is hidden to the user, I am assuming https://oni-db.com/details/ethanolgas represents the actual values in the game.
I suspect the molar mass of ethanol gas is bugged, similarly to a recent bug @Bryce fixed with its conductivity.
Steps to Reproduce
Find a way to look at the hidden molar mass values in the game.
This issue has been fixed in either a future version or updated in a previous version.