Calculate the moles in a sample with 7.50 x 1026 atoms of potassium.

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 7.50 × 10^26 atoms of potassium

So we have

We have the final answer as

Hope this helps you

increased stability in the completion of fluorine's outer shell.