Ahot-air dryer is used to reduce the moisture content of 2200 kg/min of soybeans from 0.18 w/w water to 0.13 w/w water. air is drawn from the atmosphere at 22°c, 760 mm hg, and 50% relative humidity ( 2 * 2 h o h o p p ). the air is heated and then passes through the dryer. the air leaves the dryer at 50°c and 15 mm hg (gauge). a sample of the air is drawn into a chamber and slowly cooled while keeping the pressure constant. a mist is observed to form on the mirror in the chamber at 35.5°c. a) what is the rate (kg/min) that water is removed from the soybeans? b) what is the volumetric flow rate of air entering the dryer to achieve this?

Lithium diisopropylamide [(ch3)2ch]2nli, referred to as lda, enjoys many uses as a strong base in synthetic organic chemistry. it is customarily prepared by the reaction of diisopropylamine [(ch3)2ch]2nh with butyllithium. draw the products of the reactions in the appropriate boxes and select the acid, base, conjugate acid, and conjugate base. be sure to answer all parts.

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?