posted by Al .
If you had 5 grams of Na and 5 grams of Br, which would have more atoms
Is that 5g Br2?
moles Na = 5/23 = ??
# atoms = moles x 6.022E23 = ??
moles Br2 = 5/about 160 = ?? and since it is Br2, number of atoms is twice that.
Each mole contains 6.022E23 atoms.
?? moles Br2 x (2 atoms Br2/mole Br2) x 6.022E23 = number of atoms Br2.