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Phosphorous pentachloride forms from phosphorus trichloride and chlorine: PCl3(g)+Cl2(g)->PCl5(g) given: ?Ssys=-170.2J/K, ?Ssurr=295.0J/K, ?Stotal=124.8J/K, reaction is spontaneous under standard-state conditions at 25?C Estimate the temperature at which the reaction will become nonspontaneous.
when 15.0g of steam drops in temperture from 275.0C to 250.0C how much heat is released csteam=2.01j/gC
Determine the molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.46.
what is the minimum number of photons you would need to interact with these atoms in order to have all of their electrons promoted to the n = 3 level? What wavelength of light would you need to perform this experiment
Use the Van Der Waals equation to calculate the pressures of the three real gases. Compare the plots and explain the origins of any differences you find.
If a solution contains 0.01 M Ca^2+, 0.01 M Zn^2+, and 0.01M Ni^2+ ions and you want to separate them using aqueous (NH4)2C2O2, which ion will precipitate first as an oxalate, CaC2O4, ZnC2O4, or NiC2O4
Part A. At 25°C, another student has the following data for the aluminum cylinder. The uncertainty in mA, mB, and mcyl is 0.001 g.
The dependance of the equilibrium constant of a reaction on temperature is given by the van't Hoff equation: lnK = -change of H/(RT) + C where C is a constant
At equilibrium, the flask contains 90.6g HI Calculate the equilibrium constant for the reaction at this temperature.
Calculate the mass of water formed by the complete reaction of 935 g of propane (C3H8) with excess oxygen. (Write a balanced equation)
Describe the uniqueness principle and explain the three principal reasons why second period elements are notably different from their heavier counterparts.
Consider the titration of 40.0 mL of 0.050 M of the fully protonated form of tryptophan with 0.10 M KOH. Calculate the pH of the solution at the following points
Arrange these compounds in order of increasing boiling point: CH3CH2CH2OH CH3CH2CH3 CH3CH3 CH3CH2CH2Cl Rank from smallest to largest
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