When dissolved in water, an acid or a base breaks down into a proton and an electron.
two negative ions.
a positive anda negative ion.
a positive ion and a proton

C

Explanation:

the answer is a posotive and a negative ion

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j