How many atoms of oxygen are in one MOLE of Al_2(CrO_4)_3 8H_2OAl2(CrO4)38H2O?

1 Answer
Oct 24, 2016

Well, there are clearly (?) 20 oxygen atoms per formula unit of Al_2(CrO_4)_3*8H_2OAl2(CrO4)38H2O. Agreed?

Explanation:

So thus in 1 mol of the aluminum chromate hydrate there must be 20 mol of oxygen atoms, i.e. 20xxN_A20×NA "oxygen atoms"oxygen atoms, where N_A="Avogadro's number"NA=Avogadro's number == 6.022xx10^23*mol^-16.022×1023mol1. That's a lot of arithmetic.