Answer:
0.87 moles
Step-by-step explanation:
Given data:
Number of moles of magnesium = ?
Number of atoms of magnesium = 5.23 × 10²³ atoms
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.
For example,
one mole = 6.022 × 10²³ atoms
5.23 × 10²³ atoms × 1 mol / 6.022 × 10²³ atoms
0.87 moles