Aballoon that contains 0.750 moles of gas has a volume of 16.8 l. if additional gas causes the balloon to expand to a volume of 25.4 l at a constant pressure and temperature, how many moles of gas does the balloon now contain?

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

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.

If you want to create an electrical current, which situation would produce a solution capable of this