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Concept explainers
(a)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of a lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(b)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of a lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(c)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of a lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(d)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of a lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
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Chapter 19 Solutions
General, Organic, and Biological Chemistry
- 3. Borane (BH3) belongs to D3h point group. Consider the vibrational (stretching) modes possible for B-H bonds under D3h symmetry. Using the methods we used in class, construct the reducible representation I, and break it down into irreducible representations using the character table provided. Sketch those modes, indicate whether they are IR-active. (6 points) D3h E 2C3 3C2 σh 283 30% A₁' 1 1 1 1 1 1 x² + y², z² 1 -1 1 1 -1 R₂ E' 2 0 2 0 (x, y) (x² - y², xy) " A₁" 1 1 -1 A2" 1 -1 -1 1 Z E" 2 -1 0 -2 1 0 (Ry, Ry) (xz, yz)arrow_forward1. List all the symmetry elements, and assign the compounds to proper point groups: a) HCIBrC-BrCIH Cl Br H (2 points) H Br b) Pentacarbonylmanganese(I)bromide Br OEC-Mn-CEO 00- c) Phenazine (aromatic molecule, with delocalized bonding) 1 d) Cobalt(ethylenediamine)33+ (just the cation) 3+ H₂N H₂ .NH2 (CI)3 NH2 H2 H₂N. (2 points) (2 points) (2 points)arrow_forwardHello, I desperately need help figuring out 8-14; I also wanted to see if you would mind letting me know if I picked the right degree as my melting points on the two graphs. Please and thank you in advance! All the information is provided.arrow_forward
- The reaction: A + B ⇌ 2 C, can be represented by the equilibrium expression, KC =[C]2[A][B]=258 at 520K.When 1.00 M of C was allowed to reach equilibrium and 0.055 M of A was formed. If this reaction wasperformed at the same temperature using 0.500 M C, what would the equilibrium concentration of Abe?arrow_forward1. What is the functional group of an alcohol and a phenol? 2. Why are some alcohols soluble in water? 3. Classify each of the following alcohols as primary, secondary or tertiary. a. 3-pentanol b. 2-methyl-2-butanol c. 1-propanolarrow_forwardI need help with B2 using the information in B1. This is for my lab notebook, and I got confused on number 2. Please help.arrow_forward
- 4. Aluminum has a face-centered cubic structure. The unit cell length is 4.05Å. Calculate the radius of Al atom in the metal. (5 points).arrow_forwardHF and HNO2 are both considered weak acids. Given the following K values for their dissociationequations, which is the weaker of these two weak acids?HF (aq) ⇌ H+(aq) + F –(aq) K=6.6 x10-4 HNO2 (aq) ⇌ H+(aq) + NO2–(aq) K=7.2 X 10-4arrow_forwardThe equilibrium constant for this reaction is 5.88 x 104. If concentration of the lead ion is 5.24 M, whatis the concentration of the chloride ion?Pb2+(aq) + 2 Cl- (aq) ⇌ PbCl2(s)arrow_forward
- c. 1-propanoi 4. If you add chromate, an oxidizing agent, to each of the following, would a green Cr3+ solution be formed? a. 3-pentanol b. 2-methyl-2-butanol c. 1-propanol 5. If an alcohol solution has a pH of 5, would it be a primary alcohol, a secondary alcohol, a tertiary alcohol, or a phenol?arrow_forwardGiven the reaction: A(aq) + B(aq) ⇌ 2C(aq) + D(aq). 2.00 moles of each reactant were dissolved into 1.00 literof water. The reaction reached equilibrium, and at equilibrium the concentration of A was 1.60 M.A) Calculate the equilibrium concentrations for each substance. B) Write the equilibrium constant expression. C) Calculate the value for the equilibrium constant, Keq.arrow_forward1) Draw the structures of D-lysine and L-lysine and assign R/S configuration (showing your workings). 2) Draw the predominant ionisation forms of the free amino acid lysine, at pH 1.0, 8.0, and 11.0. pKa values: 2.2 (-COOH), 9.0 (α-NH3+), 10.5 (side-chain). 3) Calculate (showing your workings) the % of the different ionized species that are present in a 1.00 M solution of L-proline at pH = 10.0. pKa values: 1.95 (- COOH), 10.64 (α-NH3*). 4) a) Draw the tripeptide Tyr-Pro-Lys once with a trans peptide bond between Tyr and Pro and once with a cis peptide bond between Tyr and Pro. b) The electrospray ionization mass spectrum (ESI-MS) of the tripeptide you designed in part (a) shows peaks indicative of mono-protonation and di- protonation of the tripeptide. At what values of m/z would these peaks be expected (no fragmentation)? Briefly explain your answer (showing your workings). 5) How could the sequence of Ala-Met-Thr be distinguished from that of Thr-Ala- Met by tandem ESI-MS-MS?…arrow_forward
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