# What is the STP of H_2 in chemistry?

As far as I l know $S T P$ specifies $273.15 \cdot K$, and a pressure of $1$ $a t m .$
Under the given condtions, $1$ $m o l$ dihydrogen gas would have a volume of $22.41 \cdot L$ at $S T P$. What is the mass of this quantity of ${H}_{2}$?