<h2>Hello!</h2>
The answer is: 
<h2>Why?</h2>
First, we need to look for the K molecular mass:

Also, we need to remember that 1 mol of a compound or element is equal to
of that compound.
From the statement, we are asked to calculate how many atoms of K are present in 195,49 of K.
So, doing the calculations, we have:

So, we have
atoms of K in 195,49 grams of K.
Have a nice day!