Answer:
4.2 moles of Ar
Step-by-step explanation:
Given data:
Number of moles of Ar = ?
Number of atoms of Ar = 2.53 × 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
2.53 × 10²⁴ atoms × 1 mole / 6.022 × 10²³ atoms
0.42 × 10¹ mole
4.2 moles