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

Answer : The number of atoms of cobalt are,

Explanation : Given,

Mass of cobalt sample = 2.2 g

Molar mass of Cobalt = 58.93 g/mole

First we have to calculate the moles of cobalt.

Now we have to calculate the number of atoms present in cobalt sample.

As, 1 mole of cobalt sample contains number of cobalt atoms

So, 0.0373 mole of cobalt sample contains number of cobalt atoms

Therefore, the number of atoms of cobalt are,