Calculate the number of mg of mn2+ left
unprecipitated in 100 ml of a 0.1000m solution of mnso4
to whichenough na2s has been added to makethe final
sulfide ion (s2-)concentration equal to 0.0900 m. assume
no change in volume due tothe addition of na2s.
thepksp of mns is 13.500.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

In 2002, the rare earth elements mine in mountain pass, california was closed because

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.