13. Determining whether the formation of an ionic compound is endothermic or exothermic reaction requires analyzing the individual steps that must occur for the reaction to take place. Which of the following steps is not necessary to combine barium and chlorine into the compound barium chloride?
Ba() + Cl2 → BaCl2
O Barium must be lonized.
O Chlorine must be lonized.
The compound must be separated into lons.
Ions combine to form compound.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.