2ND SEMESTER EXAMINATIONS 2016/2017 SESSION PAPER CC
MISTRY
TIME:2 HRS
COURSE
Jotting, writing or any other inscription on your question paper, except name and registration number where neces
PROHIBITED IN THE EXAMINATION HALL ATTEMPT 2 IN SECTION A AND 2 QUESTIONS IN SECTION B
T and Z are two elements which form T2Zz and TZ2 molecules. If 0.1 m
of T2Z3 and TZ2 weighs 16.9 g and 10.3 g respectively. What are the
atomic mass of T and Z?

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.