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Camphor (C10H16O) melts at 178.4 degrees C and has Kf=37.7 K/m. A sample of unknown substance that weighs .840g lowers the freezing point of 25g of camphor to 170.8 degrees C. What is the molar mass of unknown substance? Assume unknown solute does not dissociate in solution.
Will changing the temperature of the surroundings favor spontaneity, nonspontaneity, or have little effect? deltaH = -30.4 kJ/mol
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
Consider the reaction when aqueous solutions of sodium acetate and potassium sulfide are combined.
What is the normality of a solution prepared from 10 ml 0.6 N nitric acid by diluting it to 60 ml
Calculate the equilibrium constant for the reaction
which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl
what mass of ammonium chloride must be added to 2.00L of 0.450M ammonia to produce a buffer with pH=9.50 Kb=1.8E-5 for ammonia
MgBr2 and Pb(NO3)2 2) CuSO4 and H2S Write ionic equations (molecular reactions, ionic equations and net ionic equations indicating the spectator ions in these reactions)
what is the ph at the stoichiometric point end point for the titration of 50 ml of 0.20 m methyl amine ch3nh2 aq with
Explain why hermitian operators are important in quantum mechanics. Use the expression for the momentum operator ˆpx to derive the expression for the kinetic energy operator ˆ Tx.
Which of the following aqueous solutions has the highest boiling point. Kb for water is 0.52 degrees C/m.
Give the structure of the phosphorus ylide and carbonyl compound you might use to prepare the following alkenes
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