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An oligomeric protein has a molecular weight of 168000. A 420 mg sample was treated with an excess of 1-fluoro-2,4-dinitrobenzene (Sanger\'s reagent) until the reaction was complete. Next the peptide bonds were hydrolyzed by heating with concentrated HCl. The product of the complete hydrolysis contained 3.2 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the ?-amino groups of other amino acids could be found.
A chemical process is used to convet toulene (MW=92) and hydrogen to benzene (MW=78) and methane (CH4) by the reaction : Toulene+H2->Benzene+CH4
electrons are ejected with a kinetic energy of 3.54x10^-19 J. What is the work function of the metal in joules?
A stream of oxygen was passed at a rate of 20mL per minute at S.T.P. for 1 hour through a silent electric discharge followed by a gas-washing bottle containing aqueous ammonium iodide
Calculate the molar amounts of NaOH used in the reaction with the HCI solution and with the HC2H3O2 solution?
A 1.80-g sample of a large biomolecule was dissolved in 21.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C
delta H = -174 kcal/mol (-728 KJ/ mol) methanol for the process. How many kilocalories are released by burning 2.00mol of methanol? 3- How many kilojoules are released by burning 55g of methanol?
Pesticide concentrations in the Rhine River between Germany and Grancn between 1969 and 1975 averaged 0.55 mg/L of C6Cl6, 0.06 mg/L of C12H8Cl60 and 1.02 mg/L of C6H6Cl6.
How many grams of ammonium sulfate can be produced in 30 mol of H2SO4 react with excess NH3 according to the equation 2NH3(aq)+H2SO4(aq)-->(NH4)2SO4(aq)?
A 40.2 L volume of methane gas is heated from 25°C to 86°C at constant pressure. What is the final volume of the gas?
A student was using the concentrations of pipet calibration data listed in the Background Information for the determination of ka or propionic acid. Explain the problem the student encountered when preparing the following equilibrium mixture.
What is the vapor pressure in mmHg of a solution prepared by dissolving 5.00g of benzoic acid (C7H6O2) in 100g of ethyl alcohol (C2H6O) at 35 C?
How much of an epoxy that has a "weight per epoxy" of 435 in 80% solid solution is needed for the same reaction?
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