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Protein Quantification How did you determine whether your spectrophotometer was accurate(see hint above) and if it was not,what is the error?
Protein Quatification IS your spectrophotometer accurate? In other words,is the absorbance response it gives to your at A280 correct?
Protein Quantification Explain why necessity for one or two plots will depend on the absorption response of the instrument and not on your standard concentrations alone.In other words,why would your
Protein Quantification why should a new standard curve be prepared each time a protein sample must be analyzed for its concentration?
Protein Quantification why is it more useful to plot absorbance vs. weight units(mg/ml) instead of absorbance vs. molar concentration?
Protein Quantification :why did you choose one standard curve over the other for analysis of your unknown?
on't 2 and 3 have multiple answers? I think I'm only supposed to have one, though? How do you differentiate using the water solubility chart?
One student measure the pH of the following three solution (weak base, conjugate acid and buffer). Using this data, please calculate the pKa and pKb (show calculation).
A person ate 0.999 pound of cheese (an energy intake of 7990 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain
calculate the molar change in chemical potential of an ideal gas that expands 10 times of its original vol. at 100k
A gas expands and does P-V work on the surroundings equal to 259 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Calculate the expansion work done in kJ against a constant external pressure of 0.961 atm and at a constant temperature of 20°C. Assume that the initial volume of dry ice is negligible and that
One student measure the pH of the following three solution (weak base, conjugate acid and buffer). Using this data, please calculate the pKa and pKb (show calculation). a. pH = 8.7 for 0.010 M RNH2
A 25.00-mL sample of an unknown H3PO4 solution is titrated with a 0.100 M NaOH solution. The equivalence point is reached when 52.58 mL of NaOH solution is added. What is the concentration of the un
What type of energy, kinetic or potential, is contained in chemicals? What aspect of chemicals is changed during a chemical reaction such that reactions relate to chemical energy?
Propylamine, also known as n-propylamine, is an amine with the chemical formula C3H9N. Propylamine is a weak base with its Kb equaling 4.7 * 10^(-4). Calculate the pH of 0.59 M solution of propylami
Consider 1 mole each of gaseous He and N2 at the same temperature and pressure. The diameter of N2 is 1.7 times that of He. State which gas (if any) has the greater value for: a) <c>; b) crms;
Sulfuric acid is a strong monoprotic acid. The bisulfate anion is a weak acid with a pKa of 1.92. Calculate the pH of a 0.1000 M solution of sulfuric acid.
Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0 x 10-10 torr. Calculate the mean free path of N2 molecules and the binary number of collisions, Z11, of N2 molecules
Citric acid is a triprotic acid with pKa1=3.15; pKa2=4.77; pKa3=5.19. Calculate the concentrations of all species in solution.
For the molecule shown below, choose all the statements that are true. Soluble is where at least 10 drops of the compound can be added to a particular solvent (in this case, water or hexane-- CH3CH2
Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 2-bromobutane. Draw the organic product resulting from using these chemicals in the Wittig reaction.
Why does the haloform reaction only work for methyl ketones and not for compounds such as 3-pentanone?
Provide a structure for the following compound: C9H10O3; IR: 2400-3200, 1700, 1630 cm-1; 1H NMR: ? 1.53 (3H, t, J = 8 Hz); ? 4.32 (2H, q, J = 8 Hz); ? 7.08, ? 8.13 (4H, pair of leaning doublets, J =