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A protein subunit from an enzyme is part of a research study andneeds to be characterized. A total of 0.160 g of this subunitwas dissolved in enough water to produce 2.00 ml ofsolution. At 28 degrees C the osmotic pressure produced by thesolution was 0.138 atm. What is the molar mass of the protein.?
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-- CH3CH2CH2CH2CH2CH3) and the result is one homogeneous l..
A sample of gas has an initial volume of 3.0 L at a pressure of 747 mmHg,If the volume of the gas is increased to 3.4 L , what will the pressure be?
Find the mass of S8 required to produce 8.37L of Sulphur Dioxide gas at STP from the reaction described by the following equation:S8 + 8O2 yields 8SO2
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 7.0X10^-2 M NaOH. (a) hydrobromic acid (HBr)
Explain how the formation of a soap ‘micelle' helps remove dirt and oil in an aqueous environment.
a gas sample was collected over water at 25.3oc. the total pressure is determined to be 0.97 atm. what is the partial
Calculate the pH of a buffer that contains 0.060M ammonium chloride and 0.075M ammonia. The Ka of ammonium is 5.6 x 10^-10.
Assume that the ideal gas law is valid, with T=t(celcius)+a, and that the values of R and a are not known. Determine R and a from the measurements provided.
A sample system consists of argon confined in a cylinder with a movable piston. Moving the pistion inward uses 24.9J. 15.6J of heat are produced and dissipated to a surrounding water jacket.
A 4.82-L sample of carbon monoxide is collected at 55°C and 0.833 atm. What volume will the gas occupy at 1.05 atm and 25°C?
A solution is 0.43 M Sr(OH)2. What are the concentrations of H3O+ and OH ‾ in this solution?
The natural abundance of 13C is only 1.1%. Furthermore, its sensitivity in NMR spectroscopy (a measure of the energy difference between a spin aligned with or against an external magnetic field)
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