Calculate the mass of 3.01 x 1024 atoms of P.

155g

Explanation:

To solve this problem, we have to derive the number of moles of the element given from the number of atoms first.

   Number of atoms  = 3.01 x 10²⁴ atoms

 From mole concept;

    6.02 x 10²³ atoms is found in 1 mole of a substance

     3.01 x 10²⁴ atoms of P will contain   = 5moles of P

 Now;

  Mass of P  = number of moles x molar mass

Molar mass of P = 31g/mol

  Mass of P = 5 x 31  = 155g