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Explain why the pKa value of p-aminophenol is higher than that of p-nitrophenol. Would you expect the pKa value of m-aminophenol to be higher or lower than the pKa of p-aminophenol?
Consider a solution of ethanol, C2H5OH, and water in which the mole fraction of ethanol is 0.0820. The density of the solution is 0.978 g/mL. Calculate the molality, molarity and percent by mass of
A pharmaceutical preparation made with ethanol (c2h5oh) iscontaminated with methanol (ch3oh). a sample of vapor above theliquid mixture contains 97/1 mass ratio of c2h5oh to ch3oh.
In order to use this for chemical species that often have Avogadro's number of particles present, we employ Stirling's Approximation. Stirling's Approximation is useful for large numbers on the orde
How fast must the wing move through the air at an altitude of 10,000 m with the same lift coefficient if it is to generate the same lift?
Osmotic pressure is often used to determine the molar mass of large molecules; however, errors can be introduced into the calculationif the sample is not purified.
A boat of length 50 m is designed to cruise at 30 mph and is to be tested in a tow tank with a model of length 0.5 m. What is the appropriate model tow velocity in m/s?
A solution of ammonia and water contains 3.30×1025water molecules and 6.90×1024 ammonia molecules.How many total hydrogen atoms are in this solution?
Compute the volume fraction of precipitates in both steps 1 and 2. Consider that the density of the precipitates is the same with that of the solid solution and is independent of the Cu concentratio
Draw a schematic showing several neighboring lattice unit cells and indicate the slip systems (slip plane(s) and slip direction(s)) which are activated by this type of loading. How many independent
What is the (a) upper-bound, and (b) lower-bound modulus of elasticity values (in GPa) for a composite that has a composition of 26 vol% of oxide particles.
Determine the number of sensors required and the cost of auxiliary power in a facility that provides hot water to a community of 34 residents.
IRA savings plans and average a 7% annual return on investment. When Sammy retires, how much money is in his retirement saving accounts? show your work.
What is the molarity of a solution of calciumhydroxide, Ca(OH)2, if 187 mL isneutralized with 47.79 mL of a 0.397 M HCl?
Estimate the final, uniform temperature of the sphere and water if it is left to cool for a very long time and all heat losses from the water to the surroundings can be neglected.
The pH of a Ba(OH)2 solution is 10.66 at25 oC. What is the hydroxide ion concentration of this solution? If the solution volume is 250. ml, how many grams ofBa(OH)2 must have been used to make this
Water is to be pumped from a lake to a tank uphill that is open to the atmoshpere. Calculate the maximum elevation z of the ranger station if the pipe rises at an angle of 30 degrees.
The human eye contains a molecule called 11-cis-retinalthat changes conformation when struck with light of sufficientenergy. The change in conformation triggers a series of events thatresults in an
Air expands from 500 psia, 5000F to 15 psia in a process that is reversible adiabatic. If the atmospheric pressure is 14.7 psia, what is the useful work produced from this expansion measured per l
The evaporator pressure is 200 kPa and the condensor pressure is 1600 Kp. Find the rate of cooling of the evaporator, the power input and the COP.
The state of air beginning the compression process is 95 kPa and 20 degrees celcius. The maximum temperature is not to exceed 2400 degress Kelvin. Find the MEP and the Thermal Efficiency.
Degrees Celcius, and the heat loss from the water during heating can be neglected. What is the time it takes to heat the water to the desired temperature?
A 10.0-L balloon contains helium gas pressure of655mmHg. What is the new pressure of helium gas at each of the following volumes if there is no change in temperature?
Determine the exit temperature of the helium in degrees celcius. Determine the exergy change of the steam during this process and the maximum work that the steam could have done.
On the second mechanism, the book only mention that the reactants includes the acetonitrile but there's no NaOH or acid. Where did you get the proton?