How much of an energy change would it take to turn a 50.0 g sample of ethanol from a gas to a solid assuming no temperature change during the process?

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 best explains why an iceberg floats?

The grooves or folds of the brain are called