English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 111 F5U uranium pentafluoride F5W tungsten pentafluoride F6Fe2 diiron hexafluoride F6La2 lanthanum trifluoride dimer F6Mo molybdenum hexafluoride F6NP3 nitridotriphosphorous hexafluoride F6Os osmium hexafluoride F6Pu plutonium hexafluoride