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Problem- A polypeptide contains 3 lys and 2 arg residues (internal). Assuming cleavage was 100%efficient how many peptide fragments can be expected after cleavage with enzyme trypsin?
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Why is the H-O-H bond angle in a water molecule (H2O) smaller than the H-C-H bond angles in methane (CH4)
The solution was cooled in an ice-water bath for 10 minutes and pure crystals were obtained. The crystals were filtered on a Hirsch funnel and rinsed with about 0.5 mL of ice-cold ethanol. After drying, the weight of the crystals was found to be 5..
Three colorless solutions in test tubes, with no labels, are in a test tube rack on the laboratory bench. Lying beside the tests tubes are three labels : 0.10 M Na2CO3, 0.10 M HCL, and 0.10 M KOH.
Starting with a 5-carbon alcohol, a 6-carbon alcohol, and malonic ester, complete the synthesis and name the product(using the Malonic Ester Synthesis)
the absolute temperature of the gas at which 3.33 10-3 mol occupies 257 mL at 722 torr K (c) the pressure, in atmospheres, if 0.0471 mol occupies 428 mL at 118°C atm (d) the quantity of gas, in moles, if 66.2 L at 50.°C has a pressure of 11.38 kPa..
Name 4 properties of a compound that is directly influenced by the polarity of the compond. And state the 2 most important factors that affect the
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
question a hot air balloon has a volume of 4.00 x 105 l at 30 deg. c and pressure of 748 mmhg. if the avg molar mass of
Gaseous oxygen is held in 2 separate containers at identical temperature and pressure. The volume of container A is 7.92 L and it contains 0.209 mol of the gas. The volume of container B is 2.45 L. How many moles of the gas are in container B
Depict the arrowing pushing mechanism of Amyl acetate (pentyl acetate) being formed from acetic anhydride and pentanol, using Dowex 50 x 2 ion exchange resin as the acid catalyst.
What would be the absorbance expected if th sample is diluted toa concentration of 0.040 M? Explain. B) What would be the absorbance expected if the path length of theoriginal solution is decreased to 0.10 cm? Explain.
What are some factors to help you determine the relative strength of a base. For example, how would you know that NH2- is a very strong base. Or that OH- is a weaker base than NH2- And that CN- is a relatively weak base
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