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Problem- Bovine serum albumin (BSA) is a biochemically useful protein. A 0.452 gram sample of bovine serum albumin is dissolved in water to make 0.194 L of solution, and the osmotic pressure of the solution at 25 °C is found to be 0.869 mbar. Calculate the molecular mass of bovine serum albumin.
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You are trying to extract the compound 2-aminobenzoic acid from an aqueous solution into ether (in a form with a net zero charge). At which pH would the extraction be the most efficient? Ka1(COOH)=8.3x10^-3 and Ka2(NH3+)=1.10x10^-5
Explain how many grams per mL of aspirin are in the resulting solution. Note a 250-mL volumetric flask has a precision of 0.01 mL as well as the amount of NaOH added has no bearing on the important figures in the final concentration).
A dose of aspirin of 5.0 mg per kg of body weight has been prescribed to reduce the fever of an infant weighing 12.5 pounds (1.0lb = 454 g). The number of milligrams of aspirin that should be administered is
Explain how much does it cost me every time we heat the air in the living room from 73.0°F to 76.0°F? How many kWh does it take? The heat capacity of our air is 1.01 J/(g°C).
If the energy levels of hydrogen like one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Forecast the wavelength of the 2s--->1s transition in He+.
the osmotic pressure at 20.0 degrees C is 3.62x 10^-3 atm. What is the molar mass of the protein hemoglobin?
Problem- Ksp for SrSO4 increases from 2.8 x 10^-7 at 37 degrees celsius to 3.8 x 10^-3 at 77 degrees Celsius. Is the dissolution of SrSO4 exothermic or endothermic
given the following bond enthalpy values calculate the enthalpy of formation for gas phase isopropanol c3h7oh at 25
Choose the correct expression for Keq and description (homogeneous or heterogeneous) for the following reaction: 2 PbO(s) + 2 SO2(g) 2 PbS(s) + 3 O2(g)
Calculate the ph at the equivalence point for the titration of 1.0 m ethylamine by 1.0 m perchloric acid
Question- A cube of copper has a volume of 3.54cm^3. 1) What's is the mass of the copper cube. Given density of copper = 8.96g/cm^3. A sheet of Aluminum foil measures 3.5cm by 7in and has a mass of 2.95g.
Problem- A researcher mixed 8.00mL of 1.33x10-1M Fe(NO3)3 with 102.0mL of 2.45x10-3 M KSCN, using 5.00x10-1M HNO3 as solvent for both solutions. The resulting measured absorbance for the solution was 0.348. Based on the given data, calculate [SCN*..
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