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Question 15 (4 points) What is the correct structure of histidine at pH 1? The pKa...
Question 17 (4 points) What is the correct structure of histidine at pH 1? The pKa...
Question 17 (4 points) What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid). 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)? OH NH H2 СНС NH С NH H2 CHC 뿔 NH OH H2 NH CH-C NH2 ON 0 NH 42 CH-C NH3
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic...
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid), 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)? 0C NH H2 CH C NH, NH H2 CH-C NHS OH O=C NH A
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic...
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid), 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)?
What is the correct structure of cysteine at pH 137 The pKa values are 1.7 (carboxylic...
What is the correct structure of cysteine at pH 137 The pKa values are 1.7 (carboxylic acid), 10.8 (amine (conjugate acid)), and 8.3 (sidechain, thiol). ΝΗ, * _dp OH ΝΗ, HS H2 -CÁCH NH2 CH es O Arrange the indicated protons by acidity, most acidic first: So ho į III IV OI>I> III > IV 01>II> III > IV 01> IV> III > II >I> IV > III Friedel-Crafts alkylation reactions cannot be performed on aniline because: The amino group...
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1)....
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1). Write the chemical equations for the ionic dissociations of histidine (as the pH increases) Determine the isoelectric point for histidine and indicate the structure present at the isoelectric point. The pka values for histidine are 1.82 (-CO2H). 9.17 (NH3'), and 6.00 (R group). OOH "HaN NH "INP
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
Question 5 (4 points) What is the major product of the following reaction? 1. NaOET Eto...
Question 5 (4 points) What is the major product of the following reaction? 1. NaOET Eto ΟΕΙ 2. Hot O OE EIO OH OE O O- EIO OH OEt OE EtO 애 OEt Question 6 (4 points) Friedel-Crafts acylation reactions cannot be performed on benzoic acid because: The carboxylic acid group gets acylated instead of the aromatic ring. The carboxylic acid group is moderately deactivating preventing any substitution on the aromatic ring. The carboxylic acid group attacks the Lewis acid...
Question 8 For the polyprotic acid histidine (HisH3), the hydrogens in bold can be lost. When...
Question 8 For the polyprotic acid histidine (HisH3), the hydrogens in bold can be lost. When HisH3t is titrated w to reach the second pka? Another way of asking this is when presented with a titration curve of Hisha A. 45 ml B. 37.5 mL C. 30 mL OD. 15 mL E. 22.5 mL Question 8 121 O points Save Answer with NaOH and it takes 45.0 mL to remove all protons possible. In the titration curve, how many mL...
Question 22 (4 points) Which one is the major product of the following reaction sequence? 1....
Question 22 (4 points) Which one is the major product of the following reaction sequence? 1. excess CH1 2. Ag,0, H20 heat NH2 Question 23 (4 points) Which aldehyde or ketone AND amine reactants are needed to complete the following reaction? HN NaBH;CN C=0 Amine dil. H:07 NHẠCH, NH(CH3)2 (CH3)2NCH.CH NHẠCH
please help answer Question 1 and Question 2. thank you [2] QUESTION 1 Which of the...
please help answer Question 1 and Question 2. thank you
[2] QUESTION 1 Which of the following compounds have been assigned the correct IUPAC name? OH 1-Methyl-2-propyloxycyclohexane (2) 6-Methoxy-oct-3-enoic acid Br (3) Isopropyl 3-methylbutanoate 5-Bromo-4-methylhept-2-yne A All of the compounds (1) – (4) have been correctly named (2), (3) and (4) only - с (2) and (4) only D (1) and (3) only. QUESTION 2 [2] The following is a structure of methotrexate, a drug used to treat cancer, autoimmune...
Question 17 (4 points) What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid). 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)? OH NH H2 СНС NH С NH H2 CHC 뿔 NH OH H2 NH CH-C NH2 ON 0 NH 42 CH-C NH3
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid), 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)? 0C NH H2 CH C NH, NH H2 CH-C NHS OH O=C NH A
What is the correct structure of histidine at pH 1? The pKa values are 1.8 (carboxylic acid), 9.2 (amine (conjugate acid)), and 6.0 (sidechain, the double bonded N in ring)?
What is the correct structure of cysteine at pH 137 The pKa values are 1.7 (carboxylic acid), 10.8 (amine (conjugate acid)), and 8.3 (sidechain, thiol). ΝΗ, * _dp OH ΝΗ, HS H2 -CÁCH NH2 CH es O Arrange the indicated protons by acidity, most acidic first: So ho į III IV OI>I> III > IV 01>II> III > IV 01> IV> III > II >I> IV > III Friedel-Crafts alkylation reactions cannot be performed on aniline because: The amino group...
2. (10 points) The structure for the amino acid histidine is shown below (at pH 1). Write the chemical equations for the ionic dissociations of histidine (as the pH increases) Determine the isoelectric point for histidine and indicate the structure present at the isoelectric point. The pka values for histidine are 1.82 (-CO2H). 9.17 (NH3'), and 6.00 (R group). OOH "HaN NH "INP
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
Question 5 (4 points) What is the major product of the following reaction? 1. NaOET Eto ΟΕΙ 2. Hot O OE EIO OH OE O O- EIO OH OEt OE EtO 애 OEt Question 6 (4 points) Friedel-Crafts acylation reactions cannot be performed on benzoic acid because: The carboxylic acid group gets acylated instead of the aromatic ring. The carboxylic acid group is moderately deactivating preventing any substitution on the aromatic ring. The carboxylic acid group attacks the Lewis acid...
Question 8 For the polyprotic acid histidine (HisH3), the hydrogens in bold can be lost. When HisH3t is titrated w to reach the second pka? Another way of asking this is when presented with a titration curve of Hisha A. 45 ml B. 37.5 mL C. 30 mL OD. 15 mL E. 22.5 mL Question 8 121 O points Save Answer with NaOH and it takes 45.0 mL to remove all protons possible. In the titration curve, how many mL...
Question 22 (4 points) Which one is the major product of the following reaction sequence? 1. excess CH1 2. Ag,0, H20 heat NH2 Question 23 (4 points) Which aldehyde or ketone AND amine reactants are needed to complete the following reaction? HN NaBH;CN C=0 Amine dil. H:07 NHẠCH, NH(CH3)2 (CH3)2NCH.CH NHẠCH
please help answer Question 1 and Question 2. thank you
[2] QUESTION 1 Which of the following compounds have been assigned the correct IUPAC name? OH 1-Methyl-2-propyloxycyclohexane (2) 6-Methoxy-oct-3-enoic acid Br (3) Isopropyl 3-methylbutanoate 5-Bromo-4-methylhept-2-yne A All of the compounds (1) – (4) have been correctly named (2), (3) and (4) only - с (2) and (4) only D (1) and (3) only. QUESTION 2 [2] The following is a structure of methotrexate, a drug used to treat cancer, autoimmune...
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