Molecules vs Formula Units? E21

[harperlacroix1a]

In the 6th Edition, questions E21 asks for the amount (in moles) of molecules and formula units. What is the difference between these when calculating?

[anthony_trieu2L]

There is essentially no difference when calculating for molecules and formula units. Formula units are used for ionic compounds and molecules are used for covalent bonds.

[megan blatt 2B]

I don't believe there is any difference when calculating for molecules vs formula units. In both cases you would use Avogadro's number to convert them to moles. The biggest difference between the two is that a molecule refers to covalently bonded compounds and formula units involve ionic bonds.