Empirical formula is the simplest formula showing the simplest ratio of atoms in a compound. Calculated as shown; we start by calculating the number of moles of each atom; moles of nickel = 9.11 g ÷ 58.7 g = 0.155 moles moles of fluorine = 5.89 g ÷ 19 g = 0.31 moles Then we get the ratio of the moles of nickel to that of flourine That is 0.155 : 0.31 (dividing by the smallest) 0.155/0.155 : 0.31/0.155 we get 1:2 ( the simplest ratio) Therefore the empirical formula is nif2
