Answer:
Mass = 83.33 g
Explanation:
Given data:
Number of atoms of neon = 2.486×10²⁴
Mass of neon = ?
Solution:
Avogadro number:
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
2.486×10²⁴ × 1 mol / 6.022 × 10²³ atoms
0.413×10¹ mol
4.13 mol
Mass of neon:
Mass = number of moles × molar mass
Mass = 4.13 mol × 20.18 g/mol
Mass = 83.33 g
