what is the punctuation of molar mass

punctuation? ...or do you mean units?

molar mass can be in g/mol or lb/lbmol...
they can be found in periodic table of elements.

The term "molar mass" is not a question and therefore does not require punctuation. However, if you are asking for the punctuation when referring to the molar mass in a sentence, it would depend on the context. In general, the molar mass should be written with the appropriate units and surrounded by parentheses, such as "The molar mass of water (H2O) is 18.015 g/mol."