the unit for the molecular quantity in openfoam
 

Hi All,
About the quantitiy unit in Openfoam , I found that different webpages gave different results. In the following:
http://www.foamcfd.org/Nabla/guides/...sGuidese5.html

the unit of the quantity (the 5th) is mol. but in another link:
http://www.openfoam.org/docs/user/basic-file-format.php
the unit is kilogram-mole. I am a little confused about this point. I am using OF211 version. Which one is correct ?

O