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Calculate the pH at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr
Usually in solving a crystal structure, the known amino acid sequence is built into the electron density. Mistakes in the protein sequence can be discovered by the X-ray crystallographers.
Calculate the solubilities of the following compounds in a .0333M solution of Mg(CIO4)2 using 1. activities and 2. molar concentrations
Looking at the effect of ionic strength on activity coefficients, why would the initial slope for Ca2+ be steeper than that of K+
A 50mL portion of a solution containing .2g of BaCl2.2H20 is mixed with 50mL of a solution containing .3g of NaIO3. Assume the solubility of Ba(IO3)2 in water is small.
The mercury in a .8142g sample was precipitated with excess of H5IO6. The precipitate was filtered and washed free of the precipitating agent, and .4114g was recovered. Calculate the % of Hg2Cl2 in
In what order will the following proteins be eluted from anSP-sepharose column by an increasing salt gradient at pH 7: hemoglobin, serum albumin, lysozyme, pepsin, and fibrinogen
In snapdragons, red flower color (R) is incompleletely dominant over white flower color (r), Give the genotypes and phenotypes of the F1 and F2, alongwith their expected proportions
the liberated CO2 was collected on calcium oxide and found to weigh .0515g. Calculate the percentage of aluminum in the sample
Acetic acid and ethanol enter cells by passive diffusion. Both compose of 2 carbons, hydrogen and oxygen, at pH 7 one is more membrane permeable than the other
2121g sample of an organic compound was burned in a stream of oxygen adn the CO2 produced was collected in a solution of barium hydroxide. Calculate the percentage of carbon in the sample if .6006 g
Name at least four metabolically signifant membrane bound cellular compartments and the metabolic pathways that take place with each compartment
treatment of .25g sample of impure potassium chloride with excess AgNO3 resulted in formation of .2912g AgCl. Calculate the % of KCl in the sample.
If we gave a tumor a single dose of radiation which cells would die (i.e., G1, S, G2M)? If we gave a tumor afractionated dose of radiation which cells would die, Does cell cycle affect OER (oxygen e
what is the equilibrium partial pressure of water vapor above a mixture of 44.0 g H2O and 56.0 g CHOCH2CH2OH at 35 Degree C. The partial pressure of pure water at 35.0 degree C is 42.2 mmHg. Assume
What is the change of molar Gibbs energy for the freezing of water at -10C? The vapor pressure of H2O (liquid, -10C) is 286.5Pa. The vapor pressure of H2O (solid, -10C) is 260Pa. At -10C the molar v
An ideal gas at 300K has an initial pressure of 15 bar and is allowed to expand isothermally to a pressure of 1 bar. Calculate the maximum work that can be obtained from the expansion
What weight of sodium formate must be added to 400mL of 1M formic acid to produce a buffer solution that has a pH of 3.50
The mole fraction of oxygen in the atmosphere is .21. If the barometric pressure is 0.975 atm, what is the concentration of oxygen in water? Kh=1.3 x10^-3 M/atm
What occurs with the plasma membrane so that frozen temperatures hurts a cell? I know crystals form and the cell bursts but WHAT actually occurs so that this happens
which of the following aqueous solutions will freeze at the lowest temperature? a. 0.10 m KCl, b. 0.20 m C6H12O6 (glucose), c. 0.050 m AlCl3, d. 0.15 m SrBr2, e. all of the above freeze at the same
Predict the products of the following protease digestionsby trypsin or chymotrypsin, Polylysine can adopt an alpha-helical conformation, butonly under certain buffer conditions
A gas mixtue of Ne and Ar has a toal pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture
A sucrose (table sugar, molar mass 342 g/mol) solution was made by dissolving 68.2g of sucrose in 800 g of water. What is the freezing point of this solution if Kf of water is 1.86 degrees C/Molal?
When a solution of hydrogen peroxide (H2O2) is put on a cut, it bubbles, producing water and oxygen gas. If someone puts 0.54 mL of a 3.00% hydrogen peroxide solution on a cut, what is the volume in