How many fluorine atoms are in 4.0 moles of fluorine molecules?

Question

1) 2.4 X 10^24 atoms
2) 6.6 X 10^-24 atoms
3) 4.8 X 10^24 atoms
4) 1.5 X 10^23 atoms

Answer 1

one mole is about 6.022×10^23 particles(avogadro's constant), so one mole of fluorine molecules is about 1.204x10^24 (two atoms per molecule of fluorine)
4 moles would have about 4.816 x 10^24 atoms of flourine
(answer number 3)

Answer 2

By defnition, there are 6.022 X 10^23 particles in a mole.

Molecular fluorine exists as F2, so one mole of molecules contains two moles of atoms. And you have 4 moles of molecules. Which comes out to 8 moles of fluorine atoms.

8 X 6.022 X 10^23 = 48.176 X 10^23

So, the answer is 3) 4.8 X 10^24 atoms.