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The following chemical shifts (in ppm) were observed for a given molecule using a 120 MHz NMR:
CH3= 2.25ppm; CH2= 3.63ppm
What is the frequency difference in these shifts, assuming that TMS is tuned to a frequency of 120 MHz? What would be the frequency difference for the above shifts using a 600 MHz instrument?
Use the three-step method described in the module to predict the actual precipitates which form (if such is the case) when the following solutions are mixed
How many Valence electrons, bonding electrons, and lone pair electrons are present
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Write the equation for a nonspontaneous reduction-oxidation reaction involving the transfer
A certain substance has a heat of vaporization of 29.00 kj/mol. At what Kelvin temperature will the vapor pressure be 3 times highe
Silicon has a band gap of 1.1 eV at room temperature. What wavelength of light would a photon of this energy correspond to?
a 40-year-old manager at a prominent legal firm in l.a. experiences abdominal pain post lunch. he goes to the restroom
The very dense metal iridium has a face-centered cubic unit cell and a density of 22.56 g/cm3. Use this information to calculate the radius of an atom of the element.
2,4,6-Trichlorophenol is considerably more acidic (pKa = 6) than phenol. Draw the resonance structures for the 2,4,6-trichlorophenoxide ion that explain why it is more acidic, and provide ONE sentence explaining the significance of these structures..
For the cyclohexanes substituted in the positions indicated, identify the substituents as either axial or equatorial in chair conformers. For example, a 1,2-cis relationship means that one substituent must be axial and one equatorial.
A certainly gaseous solute dissolves in water, evolving 12.0 kJ of heat. Its solubility at 25 C and 4.00 atm is 0.0200 M. Would you expect the solubility to be greater than 0.0200 M at: a. 5 C and 6 atm? b. 50 C and 2 atm? c. 20 C and 4 atm? d. 25..
Calculate the wavelength and frequency of an emitted gamma particle having the energy of 1.29x 10^11 J mol. Enter in scientiic notation.
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