How many protons does an atom of zinc contain?
It contains an amount

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.

All of the following are part of the biosphere except

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same