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A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.185 g of this subunit was dissolved in enough water to produce 2.00 rm mL of solution. At 28 ^circ rm C the osmotic pressure produced by the solution was 0.138 rm atm. What is the molar mass of the protein?
Calculate the distance (in Angstroms) and energy (KJ/mol) where the molecules are most attractive.
initially a 1.0 l container is filled with 2.0 mol of no2. as the system approaches equilibrium what happens to the
The Ksp of Ca(OH)2 is 5.5x10^-5. What is the concentration of the OH^- (aq) when in a saturated solution of Ca(OH)2 (aq)
At 850K the value of the equilibrium constant K(pressure) is 0.2970. If a sealed vessel contains an initial reaction mixture of [N2] = 0.0150M, [H2]= 0.0200M and N2H2= 0.000100M what will [N2H2] be when equilibrium in reached.
Draw a mechanism for each reaction which explains the results. All electron movement must be indicated by arrows.
What is the vapor pressure of a aqueous solution containing 10 %(by weight) ethylene glycol (62 g/mol) at 25°C. PH2O = 24.3 torr at 25°C.
Draw the skeletal structure of the major organic product in the following reaction (water is also a product).
Find the partial pressure of each produce and the total pressure in the flask at the end of the reaction.
what is the density of hydrogen sulfide at 1.2 atm and 307 K? answer in units of g/L
Calcium fluoride, CaF2, is a source of fluorine and is used to fluoridate drinking water. Calculate its molar mass to four significant figures.
What are the values of the entropy changes (system, surroundings, and universe) for the cooling of 1 mol of O2 (g) from 298 K to O2 (l) at 90.19 K if the process is done a. Reversibly b. Irreversibly by placing the sample in liquid hydrogen at 13...
For phenylanaline can be modeled as particle on a ring. Calculate the probability of finding electrons in one half of the ring from the ground state
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