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A certain fractional distillation apparatus contains a 24-cm Vigreux column stacked on top of a 30-cm glass tube that is half-filled with 4x4-mm porcelain saddles. This assembly is inserted into a boiling flask. How many theoretical plates does the column assembly provide is the HETP of the saddles is 5 cm, the HETP of the Vigreux column is 8 cm, and the HETP of the empty glass tube is 15 cm?
Which reactant is in excess from the reaction of 35.0 g of hydrogen with 276 g of oxygen to form water
Construct the lewis structure model for the ionic compound potassium chloride using the following steps.
according to these wavelenghth differences between lines in the balmer series become smaller as n becomes larger, at what wavelenghth in nanometers do the lines converge.
Calculate the work done in joules by the reaction when 0.35 g of Na reacts with water to form hydrogen gas at 5°C and 2.5 atm. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
Calculate the equilibrium value of Pb+2(aq) in 1.00 L of saturated PbCl2 solution to which 0.250 moles of NaCl(s) has been added. Assume that no volume change occurs.
An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 12.4°.
compatible combination was titrated with 0.1021M standardHCl. It took 20.97mL to reach the phenolphthalein end point and 42.00mL to reach the bromocresol greenend point.
Treatment of ethyl isobutyrate with ethoxide in ethanol, followed by mild acidic workup, leads to recovery of starting material rather than a Claisen Condensation product. Please explain this observation, using structures rather than words as much..
Calculate the pH of the solution resulting from the addition of 20 mL of 0.10 M NaOH to 100 mL of 0.10 M HCN (Ka = 4.9x10^(-10))
Determine the entropy change when 5.60 mol of HCl(l) boils at atmospheric pressure with the following information
Calculate Ecell for the oxidation of Cl(aq) to Cl2(g) by PbO2(s) in an acidic solution. Assume all other reactants and products, except for H+, are in their standard states for the below values. Round your answer to 3 decimal places. Enter scienti..
A solid mixture consists of 51.0 g ofKNO3 (potassium nitrate) and 9.0 gofK2SO4 (potassium sulfate). The mixture is added to 130g of water. If the solution described in the introduction is cooled to 0 degrees celsius
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