Give the sign of the electrodes and the reaction that occurs at each for both voltaic and electrolytic cells. Help pls

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Which of the following best describes the formation of plasma?