The amount of the mass in grams that was lost from the fusion reaction is 5.56×10¯⁷ Kg
Energy is defined as the ability to work.
The mass can be obtained as follow
E = mc²
Divide both side by c²
m = E / c²
m = 5×10¹⁰ / 3×10⁸
m = 5.56×10¯⁷ Kg
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