Afeed of 22.2 mole% ethanol and the balance water, at 1 atm and an enthalpy of 4,860 btu/lbmole, is to be separated by distillation in a plate column with open steam (at an enthalpy of 1,200 btu/1b) and a partial condenser. the bottom product is to contain 3.8 mole% ethanol and the distillate product (saturated vapour) 78 mole% ethanol. 10.0 lb of steam are used per lbmole of feed. (a) what is the condenser duty per mole of distillate product? (b) what are the co-ordinates of the δ point associated with the bottom of the column? (c) how many ideal stages are required? (d) how many actual plates are required, if the partial condenser is equivalent to one ideal plate and the rest of the tower has an overall efficiency of 75%?

Surface currents are caused by blank space . question 14 options: surface currents are caused by? differences in water temperature high salinity differences in density wind forces

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.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum