An industrial operation results in releasing air containing chloroform into the environment. A cross current absorber column is desired to reduce the concentration of chloroform in air from a mole fraction of 0.09 (y0) to 0.02 (yN) before release by scrubbing it with water that contains nominally 0.001 (x0) mole fraction chloroform. Air stream enters the absorption column at 100 kmole/hour (G). Assume dilute species with constant flow rates and equilibrium relation as y = m*x (m =10). (a) If a single stage absorber column is used, what should be the flow rate (L) of the absorbent/water to achieve the desired mole fraction of chloroform (y = 0.02)? (5 points) (b) If a multistage absorber column was used for the above process with each stage using 1000 kmole/hour (L) of water, how many stages (N) will be required to reduce the concentration of chloroform from 0.09 (y0) to 0.02 (yN)? Calculate and show

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

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.