search is now on for an element with the atomic number 119 based on periodic trends which of the following would most likely be true of this element

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.

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

What is avogadro’s number, and why is it useful