54.94X 7.42 cc

but the answer given to this question is 1.23 x 10/\-23 cc

use the formula

density=mass/volume

The mass is not given. It's the atomic mass.

Plz edit the question?

I f apply the formula of density=mass/volume then it shud be 54.95/7.42 which comes out to be 7.4043127cc and that doesnt  match with the answer.

Secondly,the question is to be given of atomic wt.