Which of the following processes involves an oxidation-reduction reaction and allows engineers to coat one metal with another?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer