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Calculate the energy difference between 589.0 nm and 589.6 nm
Group of answer choices
3.43 EE-22 J
3.00 EE-3 J
5.55 EE-20 J
none of these
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Solved in 4 steps with 3 images
- (a) Calculate the energy difference between the two spin states of 1H and of 13C in a magnetic field of 6.8 T. 1H 4.0 1.91e-29 X J 13C 4.80e-33 X J (b) What is the precession frequency of a 'H nucleus at this magnetic field? Of a 13C nucleus? 1H 4.0 290 MHz 13C 4.0 73 MHz (c) At what magnetic field do protons precess at a frequency of 300. MHz? [4.0 7.04(a) Calculate the energy difference between the two spin states of 1H and of 13C in a magnetic field of 6.8 T. 1H 4.0 1.19e-25 X J 13C 4.0 J (b) What is the precession frequency of a 1H nucleus at this magnetic field? Of a 13C nucleus? 1H 4.0 290 MHz 13C 4.0 73 MHz (c) At what magnetic field do protons precess at a frequency of 300. MHz? 4.0 7.04 T5. Calculate wavenumber for C=C and C=C by Hook's law. stronger bond higher frequency f force constant v =k/m Hooke's law M=mass k = constant smaller mass -higher frequency The force constant (f) of C=C 10 x 105 dyne/cm and C=C, 15 x 105 dyne/cm The mass (m) is the mass of atoms (or weights). The smaller the value of m, the higher the V of vibration. CH3O. H. HO capsaicin (spicy component of hot peppers)
- (a) Calculate the energy difference between the two spin states of 1H and of 13C in a magnetic field of 6.8 T. 1H 4.0 13C 4.0 J (b) What is the precession frequency of a 1H nucleus at this magnetic field? Of a 13c nucleus? 1H 4.0 260 MHz 13C (4.0 65 MHz (c) At what magnetic field do protons precess at a frequency of 300. MHz? 4.0 T.Following the Woodward-Fieser's rules, determine the Amax for the following molecule: X 382 nm 356 nm 378 nm 371 nm O258, 217, 175 nm are Amax for the observed to π* transition in UV-Vis. Choose from the following compounds to answer the questions below. A) Ethylene B) 1,3 butadiene C) 1,3,5 Hexatriene D) Ethane Compound(s) with Amax = 258 nm for the observed to T* transition in UV-Vis is/are: Choose... Compound(s) with Amax = 175 nm for the observed it to n* transition in UV-Vis is/are: Choose...
- Methyl butanoate mass spectrum was obtained at 70eV. When the electron energy is lowered to a few eV above the ionization energy, the intensity ratio I [m/z 74] : I [m/z 71] increases considerably. Briefly explain this observation5. For each value of e= 0, 1, and 2, what are the possible values for me? Fill them in the following table. possible me values 0. ve the 2.4. NMR: (8 pts) Look at the given molecules and answer the following questions H H Compound A Compound B Compound C OH H Compound D How many different chemical environments (number of peaks) would you expect to see in the 'H NMR for each molecule? A = B = C = D: = Predict how many sub peaks per multiplet would be seen in the signal for the indicated hydrogen due to spin-spin splitting? A = B = C = D = How many H of that particular type (integration) would you expect to see at the indicated hydrogen? A = B = C = D= =
- 3. A solution of [FeSCN]2 is found to have 37.4 % transmission at 447 nm. If the molar absorption coefficient (e) is 4400 at Amax 447 nm, what is the concentration of [FeSCN]2 in the solution?In a 300 MHz NMR spectrometer, A) what is the Larmor frequency in MHz of a 15N nucleus? g H = N 26.752; g = 2.7126; B) Using the same NMR instrument, suppose that a 13C nucleus from a sample generates a signal which has a frequency of 11,250 Hz higher than that from the carbons in TMS. What is the chemical shift of that carbon atom from the sample? A) 30 MHz; B) 0.15 ppm OA) 25 MHz; B) 0.35 ppm A) 35 MHz; B) 0.30 ppm OA) 25 MHz; B) 0.55 ppmThe graph below shows the absorption spectra of a substance to determine the optimal wavelength. Based on the graph shown below, what value is considered the optimal wavelength for Molecule 1 to measure absorbance? Absorption 0.851, 0.800 0.600 0.400 0.0 251.97 300.00 0.851 0.400 280 395 400.00 500.00 Wavolongth, nm 600.00 696.03
