Exercise 1-8
Calculate the number of moles
of 4.82 x 10 to the power of 24 iron atoms

7.10 moles of iron

Explanation:

Given data:

Number of moles of iron = ?

Number of atoms of iron = 4.82×10²⁴

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

4.82×10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms

0.710×10¹

7.10 moles of iron