Question

How many atoms are there in 17 moles of SO4.

Answer 1

well we know that in every mole of every substance there are 6.022*10^23 particles so you would go ahead and do this operation to find out how many particles you have
17*6.022*10^23

Answer 2

Yes, ... then go on and determine how many moles of ATOMS you have, by multiplying the number of moles of molecules times the number of atoms in each molecule.

Answer 3

totally didnt see that it was a sulfate oxyanion