5. How many moles of aluminum sulfate would contain 3.54 x 1025 sulfur atoms?

19.6 moles of aluminum sulfate

Explanation:

Given parameters:

Number of sulfur atoms  = 3.54 x 10²⁵  atoms

Unknown:

Number of moles of aluminum sulfate = ?

Solution:

Aluminum sulfate is expressed as;

        Al₂(SO₄)₃

  1 mole of Aluminum sulfate contains 3 moles of sulfur.

 6.02 x 10²³ atoms are found in 1 mole of any substance;

 3.54 x 10²⁵  sulfur atoms will be found in   =  58.8moles of sulfur

1 mole of Aluminum sulfate contains 3 moles of sulfur.

 or ;

      3 moles of sulfur is contained in 1 mole of aluminum sulfate

     58.8moles of sulfur will contain moles of aluminum sulfate

                                                       = 19.6 moles of aluminum sulfate