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In BPTI the phenylalanine has five aromatic resonances of equal intensity. However after incubation in 6 M urea the same Phe has three resonances, one of which has half the integrated area of each of the others which have the same area. Define these two spectra and the differences between them. As well Sketch the spectrum expected for this side chain in the denatured protein where at H(delta)=7.05, H(epsilon)1= 7.08, H(zeta)1= 7.00 ppm.
Use standard reduction potentials (shown below) to calculate the potential of a nickel-cadmium cell that uses a basic electrolyte that has a 0.6 M hydroxide concentration.
A laser pulse with wavelength 540nm contains 4.40mJ of energy. How many photons are in the laser pulse?
which is connected to 2 oxygen atoms, one with is sp^3 and one sp^2 hybridized and so both oxygens have 2 lone pairs of electrons. All other single bonds consist of hydrogen.
Consider the reaction IO4 ^ - (aq) + 2 H2 O(l) =H4 IO6 ^ - (aq); Kc = 3.5 x 10^- 2 If you start with 27.0mL of a 0.901M solution of NaIO4, and then dilute it with water to 500.0 mL, what is the concentration of H4IO6^- at equilibrium
hydrazine n2h4 has pkb16.07 and pkb215.05. draw a structural formula for hydrazine and write the two equations
For a solution having 1.00 x 10^-3 equivalents/L total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+] = 4.69 x 10^-11, what is the percentage contribution to alkalinity from CO32-
a 12.6 g sample of nh4no3 is dropped into a constant-pressure calorimeter containing 175 g of water at 23.5 c. what
suppose 7.70g of methane is mixed with 54.7g of oxygen . Calculate the maximum mass of water that could be produced by the chemical reaction
how to draw the Lewis Structure for this. The complete questions says: "Lithium aluminum hydride, LiAlH4, contains both ionic
Ag+ is added to a solution of 0.0018 M Cl- and 0.0018 M SCN-. Define the AgSCN precipitates first (Ksp = 1.0 × 10-12), followed by the AgCl (Ksp = 1.8 × 10-10). Explain what percentage of the SCN- is still in solution not precipitated Explain when..
The solubility of KNO3 is 155 g per 100 g of water at 75 degree C and 38.0 g at 25 degree C. What mass of KNO3 will crystallize out of solution if exactly 550 g of its saturated solution at 75 degree c is cooled to 25 degree C
Provide an expression for the relative probability of finding a population of particles in the box in the second excited state relative to the ground state at 10000K
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