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Suppose you are attempting the separation of three compounds (A, B, and C) by column chromatography on silica gel. You start by running a number of TLC in order to find the best solvent system for the separation. The results are summarized in the table below.
Solvent Rf for A Rf for B Rf for CHexane 0.10 0.00 0.00Toluene 0.20 0.00 0.04Diethyl ether 0.51 0.18 0.28Ethyl acetate 0.81 0.45 0.60
a) How polar are the three compounds: low, medium, or highly polar (please estimate)?b) What would be the result of a column chromatographic separation if the column chromatography was to be performed in the following eluents:a) diethyl ether, or b) toluene.
.134 mol of KCl and .257 mol of CaCl2 were dissolved in water. calculate the total number of moles of Cl- ions in the solution
Sample were collected in a zinc smelter to determine the exposure of a furnace tender to lead fume during his normal work duties which involves "furnace draws" and general activities around the furnace.
For the following please provide the # of bonding domains, # of nonbonding domains, polarity, intermolecular attractive forces, and which IMAF is the most important.
Calculate the equilibrium concentrations of NH3 and H2S if a sample of solid NH4HS is placed in a closed vessel and decomposes until equilibrium is reached
It takes 49.0 J to raise the temperature of a 9.60 g piece of unknown metal from 13.0 degrees celsius to 24.5 degrees celsius. what is the specific heat for the metal?
A solution is prepared by mixing 66.7 g H2O with 33.3 g HOCH2CH2OH (ethylene glycol). What is the concentration of ethylene glycol in units of molality? The molar masses of water and ethylene glycol are 18.02 g/mol and 62.07 g/mol, respectively
a Balanced reaction equation must have the same number of atoms of each element on both sides of the equation. to verify that the equation is balanced, count the otoms of each element on both sides of the reaction
The elemental mass percent composition of malonic acid is 34.63% , 3.87% , and 61.50% . Determine the empirical formula of malonic acid. Express your answer as a chemical formula.
The atmospheric pressur on Pluto is 3 microbars. Express this pressure in bars, kPa, atm, and torr.
Draw the structure(s) of the epoxide(s) you would obtain by formation of a bromohydrin from cis-3-heptene, followed by treatment with base
Determine At what temperature does C 6 H 6 boil when the external pressure = 470 torr?
given a list of the natural sciences, including mathematics, physics, chemistry, nbiochemistry, biology, ecology, where does one science end and another one begin?
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