What is the value of the acid dissociation constant ka
A 0.45 M solution of pentanoic acid (CH3CH2CH2CH2COOH) is found tohave a pH of 3.73 at 298K. What is the value of the acid dissociation constant Ka for this monoprotic acid?
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Liquid A has vapor pressure x and liquid B has vapor pressure y. What is the mole fraction of the liquid mixture if the vapor pressure above the solution is 30% A by moles?Calculate in terms of x and y.
Two blocks are stacked one on top of the other. the coefficient of friction between the two blocks is 0.20, adn the coefficient of friction between the bottom block adn the floor is 0.10. what is the maximum force you should apply to the bottom bl
If the spar has a cross sectional area of 10 mm x 20 mm, how many hours will the spar last based on the data in the graph provided?
A parallel plate capacitor is held at fixed potential while a dielectric with k=10 is inserted into the vaccuum between the plates,filling spaces. A) What is now the total electric energy stored by the capacitor if it stored 500 J prior to insertio
A box weighing 480 N is pushed along a horizontal floor at constant velocity by a force of 230 N parallel to the floor. What is the coefficient of kinetic friction between the box and the floor?
Calculate the percentages of Na2CO3 and NaHCO3 in the sample.Hint: Phenolphthalein will indicate when only the first equivalence point happens, Bromocresol green will indicate when the second equivalence happens (titrate all species).
A 0.15 kg mass is on the end of a thing rod that is rotating about its center with an angular frequency of 17 rad/s. The rod is 0.45 m long and has a mass of 0.06 kg. What is the rotational kinetic energy of this system?
Calculate the steady-state creep rate (in hr-1) if the bar has a tensile stress of (4.6x10^1) MPa at (2.45x10^2)oC. Assume that the activation energy for creep is 140 kJ/mol.
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