Last question out of all the ones ive done has got me 100% stumped, went and asked the tutor and he confessed he has not coverd this at all but desided to leave it into the practice questions, so wondering if anyone here might be able to explain how this works. 1. The problem statement, all variables and given/known data An aluminium nail has an excess charge of +3.2 µC. How many electrons must be added to the nail to make it electrically neutral? 2. Relevant equations as far as I know an electron is 1.6x10^-19 the tutor scribbled down quick since he was heading home what I beleave was ment to be the equation to equal the answer. C=3.2x10^-6 3. The attempt at a solution Im not even sure how he came to that conclusion, more than an aswer would anyone be able to explain how he got to where he is, or give me something to work on, to work it out.