What volume would 20 moles of sulfur dioxide occupy at 75.3°C with a pressure of 3.80

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.

Iwll give extra points to who gets this for ! what type of reaction is this? ?

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons