If you have ever noticed a sharp odor in the air after a thunderstorm, you might be smelling ozone. Ozone can be formed from oxygen gas when lightning passes through the air. Which statement is true about ozone?
A. Ozone helps human health no matter where it occurs.
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B. Ozone is a harmful pollutant no matter where it occurs.
C. Ozone high in the atmosphere is a pollutant, but near Earth's surface, it provides protection from harmful rays.
D. Ozone high in the atmosphere protects Earth's surface from harmful rays, but near Earth's surface, it is a pollutant,

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.