In a certain apparatus used for the absorption of sulfur dioxide, so2, from air by means of water, at one point in the equipment the gas contained 10.0 % so2 by volume and was in contact with liquid containing 0.3 % so2 by weight (liquid density is 990 kg/m3). the temperature was 50 c and the total pressure 1 atm. the overall mass-transfer coefficient based on gas concentrations was kg = 7.36*10-10 kmol/( m2 s pa). of the total diffusional resistance. 47% is in the gas phase. equilibrium data at 50 c are:

kg so2/100 kg water 0.2 0.3 0.5 0.7

partial pressure so2, mm hg 29 4683 119

a) calculate the overall mass-transfer coefficient based on liquid concentrations, kl (m/s).

b) calculate the individual mass-transfer coefficients kg, ky and kc for the gas and kl and kx for the liquid.

c) determine the interfacial concentrations in both phases.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Stage in which a typical star has completely stopped fusion

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.