1. Calculate the molar mass of CF4

* Carbon (C) has a molar mass of 12.01 g/mol

* Fluorine (F) has a molar mass of 19.00 g/mol

* Molar mass of CF4 = 12.01 + (4 * 19.00) = 88.01 g/mol

2. Calculate the moles of CF4

* Moles = Mass / Molar mass

* Moles of CF4 = 65 g / 88.01 g/mol = 0.738 mol

3. Calculate the moles of fluorine atoms

* There are 4 fluorine atoms per molecule of CF4.

* Moles of fluorine atoms = 0.738 mol CF4 * (4 mol F atoms / 1 mol CF4) = 2.95 mol F atoms

4. Calculate the number of fluorine atoms

* Avogadro's number: 6.022 x 10^23 atoms/mol

* Number of fluorine atoms = 2.95 mol * 6.022 x 10^23 atoms/mol = 1.78 x 10^24 atoms

Therefore, there are approximately 1.78 x 10^24 fluorine atoms in 65g of CF4.