An element has bcc unit cell, with edge length $10\dot{A}$, if density is $2g/{cm}^3$, then molar mass of the compound is:

An element with bcc geometry has atomic mass 50 and edge length 290 pm. The density of unit cell will be

An element (atomic mass 100 g/mol) having bcc structure has a unit cell edge of 400 pm. Then the density of the element is