Energy - Mass equation is,
E = mC²
E = Energy ( unit is J)
m = Mass of the particle ( Unit is kg)
C = Speed / velocity of light ( unit is m s⁻¹) = 3.0 x 10⁸ m s⁻¹
by rearranging the equation,
m = E /C²
m = 1 x 10⁶ J / (3 x 10⁸)² m² S⁻²
m = 1.1 x 10⁻¹¹ kg
Hence the answer is "C".
