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The total number of atoms : N = 8.95 x 10²²
Given
3 grams of Neon
Required
The number of atoms
Solution
mol of Neon :
= mass : Ar Neon
= 3 g : 20,1797 g/mol
= 0.1487
The number of atoms :
N = n x No(No=Avogaro's number)
N = 0.1487 x 6.02 x 10²³
N = 8.95 x 10²²