Atomic mass of S = 32.07 g/mol Atomic mass of F = 19.00 g/mol Moles = mass/atomic mass Moles of S : F = 1/32.07 : 1.19/19.00 = 0.0312 : 0.0626 = 1 : 2 Thus x = 2 and the compound is SF2 Solution Atomic mass of S = 32.07 g/mol Atomic mass of F = 19.00 g/mol Moles = mass/atomic mass Moles of S : F = 1/32.07 : 1.19/19.00 = 0.0312 : 0.0626 = 1 : 2 Thus x = 2 and the compound is SF2.