Question

How many ATOMS in a `6*mol` quantity of `HCl(g)`?

Answer 1

Well, we know that the `"Avogadro number"-=6.022xx10^23*mol^-1=N_A`

Explanation:

And so in 6 moles of `HCl(g)` CLEARLY there are `12N_A` ATOMS, and here we use `N_A` as we would any other collective number, `"dozens, grosses, 100's"`. There are 6 moles of hydrogen atoms, and 6 moles of chlorine atoms, bound together to form 6 moles of `HCl` molecules.

We use such an absurdly large number because we KNOW that `N_A` hydrogen, and `N_A` chlorine atoms have masses of approx. `1*g`, and `35.5*g` respectively. How did I know these numbers?