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Pepsin is the principal digestive enzyme of gastric juice. A 3.00g sample of pepsin is dissolved in enough water to make 10.0 mL of solution. The osmotic pressure of the solution is found to be 0.213 atm. What is the molecular weight of pepsin?
The bulb of the thermometer placed at the head of a distillation apparatus should be adjacent to the condenser. Explain the effects on the temperature recorded if the thermometer were placed (a) below the exit to the condenser and (b) above the ex..
A gaseous fuel mixture stored at 752 mmHg and 298 K contains only methane and propane . When 11.6L of this fuel mixture is burned, it produces 767kJ of heat methane : 890 kJ/mol propane : 2,220 kJ/mol
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 {\rm J}/{\rm g} ^\circ {\rm C} and that of steam is 1.84
Describe the difference between the following and list any particular advantage possessed by one over the other a)hydrogen and deuterium discharge lamps as sources for ultraviolet radiation
A 1.348 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution.
Calculate the mass of ammonium chloride that must be added to 500.0 mL of 0.32 M NH3 to prepare a pH 8.50 buffer; Kb for NH3 is 1.8 × 10-5.
The water temperature rose from 20.00°C to 23.55°C. If the calorimeter (excluding the water) had a heat capacity of 403 J/K, what was the heat of combustion (qV) per gram of the fuel? a. 25.7 kJ/g b. 23.8 kJ/g c. 38.5 kJ/g d. 24.8 kJ/g e
Calculate the expectation value for the potential energy of the H atom with the electron in the 1s orbital. Compare your result with the total energy
determine the ph of the following solutions, showing calculations.
How can integral dQrev/T vanish when integrated around a cycle while the cyclical integral of dQrev remains finite
62.8 mL of air is collected over water at 24 degrees celsius and 733 mm Hg pressure. find the volume of the dry air at STP
A sodium thiosulfate, Na2S2O3, solution has a concentration of 0.150 M. An end point for this titration occurs when 32.89 mL of the sodium thiosulfate solution reacts with 24.80 mL of I2 solution.
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