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A solution of ethylene glycol and water has a boiling point of 109.8 degrees celcius. What is the freezing point? (Kf H2o=1.86 degrees celcius/m; Kb H20=0.52 degrees celcius/m)
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55. The half life of Potassium 40 is 1.28 x 10^9 years.
mixed 14.5 mL of a .500 M sodium flouride solution with 15.6 mL of a .750 M hydroflouric acid solution the measured Ph was 3.24. Calculate the pKa.
What is an anionic sulfide complex. Explain in terms of coordination chemistry, and show reactions of their formation. When do these complexes form. Are these complexes water soluble
What is the triple point of material X. Consider melting 3.00 moles of material X at 1.00 atm. Assuming that the melting co-existence curve is a straight line, what is X's normal melting temperature
Calculate the equilibrium constant, Ka for the acid, HA if, at equilibrium, the pH of a 2.1 M solution of HA is 3.43
Not all Friedel-Crafts reacts require a strong Lewis acid catalysts to generate the electrophile for the substitution reaction. Show, using curved arrows, how the electrophile is generated from t-butanol in the presence of H2SO4
During a tritration, 34.62 mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What was the concentration of the original sulfuric acid solution?
A voltaic cell employs the following redox reaction: Sn^2+(aq)+ Mn(s)--> Sn(s) + Mn^2+(aq) Calculate the cell potential at 25 under each of the following conditions.
Calculate the change of volume of the cube at a depth of 1.000 km (disregarding the effects of temperature). Take the mean density of sea water as 1.03 g/cm3
determine all the octahedral and tetrahedral d-counts for which Jahn-Teller distortions are possible. Give examples of metals that might commonly exhibit these d-counts and geometries. Differentiate between low and high spin cases for octahedral g..
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54? (Ka of HClO = 3.8 x 10-8)
what is the percent by mass of a solution on made by dissolving 163 grams of table sugar in 755 grams of water.
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