What type of reaction is shown in the following chemical equation in nh3+hc1 nh4c1

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.

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.