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A student carried out a simple distillation on a compound known to boil at 124 degree C and reported an observed boiling point of 116-117 degree C. Gas boiling matographic analysis of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was accurate. What procedural error might the student have made in setting up the distillation apparatus?
The decomposition of urea in 0.1 M HCl is first order in urea and first order overall. When [urea] = 0.200 M , the rate at 61.0 °C is 8.56 x 10-5 M/s. What is the concentration of urea in this solution after 4751 s if the starting concentration is..
What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n=5
Use the appropriate standard reduction potential to calculate the value of K at 25 C for the reaction. NiO2(s) + 2Cl-(aq) + 4H+(aq) --> Cl2(g) + Ni2+(aq) + 2H2O(l)
What mass of CaCO3 will produce 8.0 L of CO2, measured at standard temperature and pressure conditions? Molar mass of CaCO3 = 100. g per mole.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is doubled and that of Br- is doubled
Calculate the solubility of carbon dioxide in water at an atmospheric pressure of 0.38 atm.Carbon Dioxide has a mole fraction of
Calculate the percentage of solvent in the dried fabric by weight; and the concentration of solvent in the dryer exhaust in mg/m^3 if the exhaust is at 160 deg F and 1 atm.
Calculate the [H3O+] of the following polyprotic acid solution: 0.330M H3PO4 and 0.390M H2C2O4
what volume of 3M H2SO4 is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction? how much sulfuric acid was in excess
If 110mg of fluorine-18, which has a half-life of 110min, is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
what is the energy difference between the heats of formation you calculated for carbocation A and B?
For the reaction NO2 + O3 = N2O5 ,the activation energy is 18kj/mol and the overall delta E is -136kj/mol. how many times faster will the reaction occur at 50C than 0C for the forward reaction
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