Solution:
Atomic weight of an element
x =6.643 x 10-23 x NA = 40
no. of moles of
One atom of an element x weighs 6.643 x 10-23 g. Number of moles of atom in 20 kg is:
One atom of an element x weighs 6.643 x 10-23 g. Number of moles of atom in 20 kg is:
