Answer:
0.517× 10²³ atoms
Explanation:
Given data:
Mass of nickel = 5.05 g
Number of atoms of nickel = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of nickel = 58.7 g/mol
by putting values,
Number of moles = 5.05 g/ 58.7 g/mol
Number of moles =0.086 mol
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
0.086 mol × 6.022 × 10²³ atoms / 1mol
0.517× 10²³ atoms
