When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. which property of the unknown element determines the other elements it reacts with? *
1 point
a. the total number of neutrons in the unknown element
b. the total number of particles in the nucleus of the unknown element
c. the number of protons in the nucleus of the unknown element
d. the number of valence electrons in the unknown element

How do scientists think that gravity affected the formation of our solar system?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

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.