What is the mass of 19.42 atoms of F? Chemistry Matter Atomic Mass 1 Answer anor277 Aug 26, 2016 Well 6.022xx10^23 atoms of fluorine (as the atom, not as F_2) have a mass of 19.00*g. Explanation: And thus 19/(6.022xx10^23*mol^-1)xx19.00*g*mol^-1 = "not too many grams". We cannot really speak of 0.42*"atoms" of fluorine. We can have the one atomic particle; we cannot really have 1/2 of an atom. Answer link Related questions How do you calculate the atomic mass of carbon? How are atomic mass and mass number different? How do you calculate atomic mass from isotopic composition ? How do atomic mass and atomic weight differ? How do atomic masses reflect isotope abundances? How do atomic masses vary throughout the periodic table? How much atomic mass is in hydrogen? What atomic mass does ekasilicon have? Why are atomic masses of most of the elements fractional? What is atomic mass? See all questions in Atomic Mass Impact of this question 2807 views around the world You can reuse this answer Creative Commons License