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Using a sample that was dissolved in CH2Cl2, mixed alumina, evaporated the CH2Cl2, loaded and began to run his column, starting with C6H14 as solvent. All 3 components of the sample ran together and not separated. Determine the possible problem?
500 ml solution of benzoic acid (ka=6.6e-5) has a ph of 2.88. What is the molarity of benzoic acid
Calculate the average speed of an oxygen gas molecule, O2, at 21.0 degrees Celsius. Express your answer numerically in meters per second.
Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is: Pb2+ + CrO4 2- -> PbCrO4. Calculate the theoretical yield using the starting quantities of both reactants.
Fluorine 18, which has a half live of 110 min, is used in PET scans. If 100 mg of fluorine 18 is shipped at 8am, how many mg of the radioisotope are still active if the sample arrives at 130 pm
If the pressure exerted by ozone,O3 , in the stratosphere is 3x10^-3 and the temperature is 246 K, how many ozone molecules are in a liter?
consider the following observations taken on successive cloudless autumn mornings. on the first day a considerable
What is the structure of the most abundant acylium ion (and resonance structure) that would be observed in mass spectral analysis
the electron-state H atom absorbs a photon of wavelength 93.78 nm. To what energy level does the
suppose a similar experiment had been done using 1.0 m h3po4 solution as the acid. what would be the expected
the Fischer esterification experiment why was the majority of the ethanol boiled off prior to extraction and why was the reaction vial cooled
calculate the activation energy for diffusion for a system where the diffusion coefficient doubles its value from 700k to 1200k. R=8.314J/molk.
Calculate the molar mass (g/mol) of a gas whose root mean square speed is 796 m/s at 512 K.
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