Number of Li atoms in 4.5 moles of Li?

Oh, dude, you're hitting me with that chemistry question! So, like, one mole of any element contains Avogadro's number of atoms, which is 6.022 x 10^23. In this case, you've got 4.5 moles of Li, so you just multiply that by Avogadro's number to get the total number of Li atoms. That's like... a lot of Li atoms, man.