Question

The disappearance of one atomic mass unit (amu) releases $x$ MeV energy, then $x$ is :

Answer 1

The disappearance of one atomic mass unit (amu) releases x MeV energy, which is equal to 931 MeV. Thus, x is 931 MeV.
$1amu=931MeV$
The modern atomic mass unit (amu) is based on the mass of $C^{12}$.
It is equal to 1/12 of the mass of an atom of carbon -12 equal to $1.6605\times {10}^{-19}g$
amu is also called as avogram. Avogram is a unit of mass and weight equal to one gram divided by the Avogadro's number.