Answer
$E = 7.30~MeV$
Work Step by Step
We can find the change in mass:
$\Delta M = M_f-M_i$
$\Delta M = (3)(4.001 51~u)-(11.996 71~u)$
$\Delta M = 0.00782~u$
$\Delta M = (0.00782)~(1.66\times 10^{-27}~kg)$
$\Delta M = 1.29812\times 10^{-29}~kg$
We can find the minimum required energy:
$E = (1.29812\times 10^{-29}~kg)(3.0\times 10^8~m/s)^2$
$E = 11.68308\times 10^{-13}~J$
$E = (11.68308\times 10^{-13}~J)(\frac{1~eV}{1.6\times 10^{-19}~J})$
$E = 7.30~MeV$
