Question

How many chloride ions are there in 4.50 mol of aluminum chloride?

Answer 1

1 mol aluminium chloride `AlCl_3` delivers 3 mol of `Cl^-` ions.

Explanation:

So `4.50` mol `AlCl_3harr3xx4.50=13.50` mol `Cl^-`

1 mol contains `~~6.02xx10^23` particles, so the answer is:

`n_(Cl^-)=13.50xx6.02xx10^23=81.27xx10^23~~8.13xx10^24`

(rounded to 3 significant digit because of the `4.50`)