posted by Anonymous .
the mass of an individual atom of fluorine is 19 amu. how many atoms would weigh a total of 1.7455x10-3g of this element if the mass of 1 amu is 1.6650x10-24
Divide 1.7455x10-3 g by the mass of one F atom, which is 19*1.6650x10-24 g
That will give you the number of atoms.
i got 1.812e-25 but it says that not the correct answer
it didn't work
1.7455e-3/(19*1.6650e-24) is not 1.812e-25