Question

How many number of potassium atoms are present in 7.8 g of potassium element?

Answer 1

Thanks for asking the question!

ANSWER::

Step 1 => Change to moles

7.8 g of potassium / Molar mass of potassium

7.8 / 39.0983

0.19949716 moles

Step 2 => Change to atoms by multiplying with Avogadro Number

0.19949716 x 6.02 x 10²³

1.200 x 10²³ atoms

Hope it helps!

Answer 2

Answer- See the following attachment.