Question

What equivalence factor should you use to convert from `4.28 x 10^19` molecules of oxygen (`O_2`) to moles of `O_2`?

Answer 1

Divide by `"Avogadro's Number", 6.022xx10^23*mol^-1`

Explanation:

`1*"mole"` of stuff specifies `"Avogadro's Number", 6.022xx10^23*mol^-1`, i.e. `N_A` individual items of stuff.

If I have `4.28xx10^19` dioxygen molecules, I have a molar quantity of `(4.28xx10^19)/(6.022xx10^23*mol^-1)` `=` `??` moles of `O_2`?

Since I know (how?) that `1` `"mole " O_2` has a mass of `32.00*g`, what is the mass of your quantity?