Question

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

Answer 1

19.6 moles of aluminum sulfate

Step-by-step 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
`(3.54 x 10^(25) )/(6.02 x 10^(23) )` = 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
`(58.8)/(3)` moles of aluminum sulfate

= 19.6 moles of aluminum sulfate