Dung dịch X chứa 0,12 mol Mg2+; 0,1 mol Fe3+; a mol Cl- và b mol SO42-. Cô cạn X thu được 31,4 gam muối khan. Cho BaCl2 dư vào X thu được m gam kết tủa. Giá trị của m là?

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 produce would best increase the amount of heat energy that is actually gained by calorimeter b

__can be defined as which velocity changes