How many atoms are in a mole of barium chloride, #BaCl_2#?

1 Answer
anor277
Feb 11, 2016

Clearly there are #3# #"moles"# of atoms in one mole of #BaCl_2#.

Explanation:

If I asked how many atoms there were in a dozen formula units of #BaCl_2#, I think you would quickly answer 3 dozen: 12 barium atoms, and 24 chlorine atoms.

The question specified molar quantities, and the mole is just another number, admittedly a very large number, i.e. #N_A# #=# #6.022xx10^23# #mol^-1#.

So in #1# mole of #BaCl_2#, there are #3# #xx# #N_A# barium and chlorine atoms, where #N_A# is Avogadro's number, #6.022xx10^23#.

What is the actual mass of this quantity of barium chloride?

Related questions
See all questions in The Mole
Impact of this question
23790 views around the world
You can reuse this answer
Creative Commons License