Q30. If three helium nuclei combine to form a carbon nucleus then the energy released in this reaction is $\_\_\_\_$ $\times 10 ^ { - 2 } \mathrm { MeV }$. (Given $1 \mathrm { u } = 931 \mathrm { MeV } / \mathrm { c } ^ { 2 }$, atomic mass of helium $= 4.002603 \mathrm { u }$ )