How many atoms of cobalt would there be in a 2.2-gram sample of cobalt?

Well, honey, if we're talking about cobalt with an Atomic Mass of 58.93 g/mol, you can use Avogadro's number to find that there are roughly 2.67 x 10^22 atoms in a 2.2-gram sample. So, buckle up and get ready to wrap your head around a whole lot of tiny cobalt atoms in that itty bitty sample.