Rbh definitions

Rbh

1) President after USG 2) President before JAG 3) President between USG and JAG 4) Presidential monogram 5) Rubidium hydride
Found on https://www.crosswordclues.com/clue/rbh

---

RbH

Rubidium Hydride Molar mass: 86.47574
Found on http://www.convertunits.com/molarmass/Rubidium+Hydride

---