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

1 Answer
Sep 16, 2017

Answer:

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?