what you have in your hand is zinc pennies,(1983 and newer)
look at 1982 and older COPPER pennies, I am positive they are not pitted like that, skip the vinegar, no need for that. Stick with the rest and you will be fine. I used to separate pennies from other clad because people say it will turn your quarters and dimes colors, then I said to myself, it is clad, who cares! Now I just run it all together, when it is clean I jut dump at the bank.