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Two isotopic compounds are produced in the synthesis of a new therapeutic drug which must be separated by repeated chromatography cycles. In each cycle, the solution containing both compounds must pass through a chromatography column with a length L = 75.0 cm. The column has N theoretical plates and the unadjusted relative retention is ? = 1.008.
A) Calculate the number of theoretical plates N in the column of length L in 20 cycles. The observed resolution is 1.81.
B) Now, calculate the plate height in the column in ?m.
C) Estimate the resolution in 4 cycles.
Is it possible for an atom to absorb a photon of red light and reemit a photon of violet light
Why was anhydrous, not wet, diethyl either used in the prepeatation and reaction of the Grignard reagent?
Indicators can be used to estimate the pH value of soultions. To determine the pH of a 0.01M weak acid (HX), a few drops of three different indicators are added to separate portions of HX. The resulting colors of the HX solution are below.
The standard free energy of activation of one reaction A is 91.70 kJ mol (21.92 kcal mol). The standard free energy of activation of another reaction B is 74.50 kJ mol (17.81 kcal mol).
A 125g metal block at a temperature of 93.2 degrees Celsius was immersed in 100g of water at 18.3 degrees celsius. Given the specific heat of metal (s= 0.900j/g x degrees celsius)
the density of titanium is 7.51 g/cm^3. What is the volume (in cubic inches) of 3.5 lb of titanium?
the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and the temperature is 25 degrees C. Calculate the atomic mass of the metal.
A mixture contains both potassium phosphate and potassium chloride. What is the percentage of potassium phosphate in this mixture if reaction of 0.401g of this mixture with excess copper (II) chloride yields 0.213g of copper (II) phosphate?
How many moles of NaNO2 will be contained in the 1 liteer, 1.34 solution after it is made? b. What volume of concentrated 5.48 M NaNO2 solution will contain this number of moles?
Hypochlorite Oxidation of Cyclohexanol to Cyclohexanone, Basically in this experiment, we took some cyclohexanol and reacted it with hypochlorite to form cycohexanone.
Detremine the concentration of chromate solution - Potassium chromate has an absorbance value
The temperature of Beaker X = 75°C and the temperature of Beaker Y = 50°C after Five minutes . determine the temperatures be after another 5 minutes have passed?
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