How to extract the equivalent molecules concentration ?

[khariyahA]

Dear Sir,

I am studying gas sensing effect on graphene. I watch video tutorial as this link ..https://www.youtube.com/watch?v=BeDbeDztQeY&t=98s ...I am seeking help from expert to guide on how to extract the equivalent molecules concentration as demonstrated in this video.
Thank you

[khariyahA]

Dear Sir,

My apology for repost. I am still figuring out on how to extract the equivalent concentration. My material is graphene with H2O (water) molecule attached to it. Is there any way to extract the equivalent H2O concentration. I am attaching herewith the picture for H2O attached on graphene.
I appreciate any feedback from the expert.
Thank you.

[Anders Blom]

I don't recall this video mentioning equivalent molecular concentration... It talks about equivalent doping, which you get from looking at the charge transfer from the 2D material to the molecule.