Calculate the amount of energy produced by the conversion of 50.0 kg of mass into energy. use 3.00 x 108 m/s for the speed of light. round to 3 significant digits. which setup will solve this problem? e = (50.0 kg)(3.00 x 108 m/s) e = (50.0 kg)(3.00 x 108 m/s)2 e = (50.0 kg)(3.00)(1 x 108 m/s)2