Question

how many atoms are present in 1/2 gm of oxygen ????​

Answer 1

no of atoms = moles×atmoic no ×Na

1/2×16×16×6.02×10^23

=3.01atom

Answer 2

Simply Asked????

Anyway answer:

No.of atoms= (Given mass/Molar Mass)×Avogadro Number

[0.5/(16×2)]×6.022×10²³

=0.015625×6.022×10²³

=0.09409375×10²³

=9409375×10^(15)

=9409375000000000000000 atoms