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193. The energy that would be released if all the mass of an electrons, 0.00055 amu  is converted into energy is
    
A. 8.2 x 10 -14 J E = mc2   mass must be in kg

1 g = 6.02 x 10 23 amu      1 kg = 1000 g

    
                                    1 g                     1 kg
0.00055 amu x ------------------------ x ------------ =  9.1 x 10 -31 kg
                          6.02 x 10 23 amu        1000 g

     
E = 9.1 x 10 -31 kg x (3.00 x 10 8 m/s) 2 = 8.2 x 10 -14 J

The Correct Answer is A.
B. 8.2 x 10 -11 J
C. 5.0 x 10 13 J
D. 5.0 x 10 16 J