Question

Find out mass of 6 x 10^20 atoms of Iron (Fe).​

Answer 1

Answer:

Explanation:

Mass of iron (Fe ) is 55

Since avagadro number is 6.022×10^23

So ,

==> 55.85× 6×10^20 ÷ 6×10^23

==> 5.5×10^-2g

Hope it's helpful!!!!!

Answer 2

atomic weight of iron=56 amu, take avogadro no=6×10^23

Explanation:

no of atoms=Atomicity×no of moles×Avogadro no

6×10^20=1×mass/atomic weight×6×10^23

mass= 6×10^20×56(atomic weight)/6×20^23

=56/1000

=56×10^-3

=5.6×10^-2