What voltage is required to store 6.90 10-5 C of charge on the plates of a 7.00-µF capacitor?
C=q/V by definition, so V=q/C=6.9E-5.8E-6= about 12 in my head. Use your calculator.
your response doesnt make any sense to me.
Divide the desired charge by the value for the plates. Make sure you convert the micro F to 10^-6.