How long does it usually take for a rock to undergo a stage within the rock cycle

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 is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

How many atoms are in 2 moles of phosphorus