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- pKa = 9.6 pK, = 2.3 H :0: || H-N- C-C-Ö-H H 120° 180° H H 20. 105° The structural formula of the glycinium cation is shown above. Arrows indicate the pka values for the labile 90° protons in the molecule. CLEAR ALL What is the approximate H-O-C bond angle in the glycinium cation? +using LCAO Mo Hükel approximation in anse The following question: Ogive 4 Nommalization SAIC: 2) What the Mo- Energies Show the enorny Scale · What the 4-Nomelizeel Ware fumeticns . What is the clelocalizeel Cnergy DE ? O Determine the Bonel Onlel fetween GC2 gand CÇ D Detemine the C 8 C? electron Density.The-carotene molecule has λmax 450 nm and ɛ = 15.000 m2 / mol. Calculate the expected absorbance value for a solution in which 0.1 mg is dissolved in 10 mL of water. ( β-carotene, C40H56, 536 g/mol path length 1 cm)
- The reaction quotient is Q=1.6×10-26 Part B What pH is needed to produce this value of Q if the concentration and pressure values are [Br2]=2.50×10−4M , [Br−]=11.65M, [SO42−]=9.50M, and PSO2=3.50×10−5atm ? Express your answer numerically to two decimal places.B The (Me2C3C%3DCM 2)Fe(CO)4 below -60 C shows three peaks in the intensity ratio 1:1:2 but at 30 °C only a singie, sharp and intense peak is observed. Explain 'H-NMR spectrum of with reference to its structure.Sketch the MO diagram for 1,3 budadiene. Determine the net bonding interactions for ¥2 and ¥3. How many nodes are in ¥4? How many AO’s were used? How many MO’s resulted?
- The quantitative differences in biological activity between the two enantiomers of a compound are sometimes quite large. For example, the D isomer of the drug isoproterenol, used to treat mild asthma, is 50 to 80 times more effective as a bronchodilator than the L isomer. Identify whether each of the indicated atoms in isoproterenol is a chiral center or achiral. HO HO chiral center OH C. H achiral CH₂ Isoproterenol H H H— - N с CH 3 achiral chiral center CH 3O=S=0 - NH OH H3C H3C Q1: How many functional groups present in the structure? Q2: Name the functional group which is heterocycle, aromatic and stable. Q3: The equation of biological activity is Log 1/C = 2.51x + 0.14a + 7.66 Discuss this equation.Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =
- 1:56 .ll 0.02 KB/S 55 4.pdf CHEM 3141: BioChemistry Quiz no.4 - The double-stranded DNA sequence for a bacteria is shown below and it's coding for a hypothetical protein. The strand on top reads 5' to 3' left to right, while the strand on the bottom reads 5' to 3' right to left. The nucleotides are numbered 1 to 100. REMINDER: For this problem, transcription begins with and includes the red and underlined C/G (top strand/bottom strand) base pair and RNA polymerase proceeds from left to right along the DNA. 1. 20 40 5-СТСТСССТСТААТАТТСТGAGAТСТТАТАТСССССССТСААСАССАТСАА-3. ------+----------+ 3'-САСAGGCAGATTATAACACTCТАСААТАТАGGGCGGCAGTTCTGGТАСТT-5* 60 80 100 5'-ACAGGATAATCGCCTGCTGGGGCAAAGGCGGTGAAGGTAAAGGTGTTGCC-3' -------+ 3'-TGTCCTATTAGCGGACGACCCCGTTTCCGCCACTTCCATTTCCACAACGG-5' 1. What are the nucleotides of the resulting mRNA? Indicate the 5' and 3' ends of the mRNA. 2. What are the amino acids translated from the resulting mRNA? 3. Do the underlined nucleotides TAA (indicated in blue)…16. The quantum mechanical treatment of the hydrogen gives the energy, E, of the electron as a h2 function of the principal quantum number, n: E = 8n²m,ažn² (n = 1,2, 3, ...) where h is Planck's constant, mẹ is the electron mass, and a, is 52.92x10-12m. a) Write the expression in the form E = -(constant)÷, evaluate the constant in joule, and compare it with the corresponding expression from Bohr's theory. b) Use the expression to find AE between n = 2 and n = 3. c) Calculate the wavelength of the photon that corresponds to this energy change.The standard state free energy of hydrolysis of acetyl phosphate isΔG° = -42.3 kJ/mol. Acetyl-P + H2O acetate + Pi Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2 mM acetate, 2 mM phosphate and 3 nM acetyl phosphate.