Asample of freon-12 (cf2cl2) occupies 25.5 l at 298 k and 153.3 kpa. find its volume at stp.

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.

How would you reduce the volume of gas

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?