What is the mass of 500mL of
1.0 M of Mg(OH)2

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.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

What human activity increases beach erosion?