What is atomic mass unit?

The formula of an acid is HXO_2 . The mass of 0.0242 moles of the acid is 1.657g . What is the atomic mass of X ?

An elements crystallizes in a face centered cubic lattice and the edge of the unit cell is 0.559nm. The density is 3.19g//cm^(3) . What is the atomic mass?

Define the atomic mass unit?

Give vlaue of atomic mass unit.

Define atomic mass unit? Find its energy equivalent in MeV.