One way of purifying gaseous H₂ is to pass it under high pressure through the holes of a metal’s crystal structure. Palla-dium, which adopts a cubic closest packed structure, absorbs more H₂ than any...

One way of purifying gaseous H₂ is to pass it under high pressure through the holes of a metal’s crystal structure. Palla-dium, which adopts a cubic closest packed structure, absorbs more H₂ than any other element and is one of the metals cur-rently used for this purpose. Although the metal-hydrogen inter-action is unclear, it is estimated that the density of absorbed H₂ approaches that of liquid hydrogen (70.8 g/L). What volume (in L)of gaseous H₂, measured at STP, can be packed into the spaces of1 dm3of palladium metal?