Question

One atom of an element weights 3.32 into 10 ^ - 23 graham how many number of gram atoms are there in 20 grams

Answer 1

Given

3.32 x 10^-23 gm = 1 atom of an element

1 gm = 1/(3.32 x 10^-23) atoms

20 gms = 20/(3.32 x 10^-23) atoms

= 6.02 x 10^23 atoms = N (avagadro number) atoms

Therefore the atomis mass of the element = 20 gms = 1 mole of the element