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135. How many electron volts are equivalent to 4.0 J?
        
A. 4.0 x 10 -20 eV 1 eV = 1.6 x 10 -19 J

   
                   1 eV
4.0 J x ---------------------- =  2.5 x 10 19 eV
              1.6 x 10 -19 J

     
The Correct Answer is C.
B. 6.4 x 10 -19 eV
C. 2.5 x 10 19 eV
D. 6.4 x 10 19 eV