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Determine the molecular formula for ibuprofen, a common headache remedy. Analysis ofibuprofen yields a molae mass of 206 g/mol and a percent composition of 75.7% C, 8.80% H and 15.5% O.
125 mg of a protein is dissolved in 10 ml of water. the density of this solution is 0.789 gml. this is placed in
We will abbreviate malonic acid, CH2(CO2H) 2 as H2M. Find the pH and concentrations of H2M, HM-, and M2- for the following. (Ka values for malonic acid are Ka1 = 1.42 10-3 and Ka2 = 2.01 10-6.)
Compute the number of rads and rems of radiation in five years from such a level of plutonium.
A 50.00mL solution of 0.100M Cd2+ is titrated with 0.100M EDTA buffered at a pH of 7.2. What is the Cd2+ concentration at the equivalence point. Kf CdY2-= 2.9e16, Ka1 EDTA= 1.02e-2, Ka2 EDTA= 2.14e-3, Ka3 EDTA= 6.92e-7, Ka4 EDTA= 5.5e-11
A solution is prepared by mixing 50.0 mL of 0.20 M Pb(NO3)2 with 50.0 mL of 1.5 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. [Ksp for PbCl2(s) is 1.6 10-5.]
Assuming that the process is working as intended, draw and label the flowchart, do the degree-of-freedom analysis, and estimate the molar flow rate (lb-mole/h) of the humidified outlet air
The increase in the rate of reaction with temperature is due to A. increase in the number of effective collisions. B. decrease in activation energy.
If He(g) has an average kinetic energy of 4610 J/mol under certain conditions, what is the root mean square speed
Write a balanced equation for the reaction. What volume of 0.200M MnO4- solution is needed to titrate 22.5mL of a 0.350M solution of ethanol?
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
The dream finally became reality when it was shown that mercury-198 can be converted into gold-198 on bombardment by neutrons. A. What small particle is produced in addition to gold-198? B. Write a balanced nuclear equation for the reaction.
How many nodal planes does a 4p sublevel contain and why. What is the possible set of quantum numbers for an electron with spin up in the 4d sublevel.
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