Question

How many moles are equal to `2.69 * 10^78` atoms of sulfur?

Answer 1

`4.47xx10^54` moles

Explanation:

How many dozens is 72? you just need to divide 72 by 12.

With mols it is exactly the same thing.
1 mol is approximately `6.022xx10^23`, so you must divide the given number by `6.022xx10^23`:

`(2.69xx10^78)/ (6.022xx10^23)=4.47xx10^54`

Since the molar mass of Sulfur is about 32.06 g/mol you will get:

`4.47xx10^54xx32.06xx10^(-3)=1.43xx10^53 kg`

This number is extraordinarly huge. It is comparable with the mass of the whole Universe, which it's taken as being at least `10^53 kg`

https://en.wikipedia.org/wiki/Universe