Concept explainers
Interpretation:
The two amino acids arginine and serine can combine to from a dipeptide. The structure of two possible dipeptides formed from these two amino acids needs to be drawn.
Concept introduction:
Amino acids are organic compounds containing amino as well as acidic groups. The general molecular formula of an amino acid is as follows:
Here, R refers to different group for different amino acids. If there is more than one amino group present in an amino acid, they are considered as basic amino acids and if there is more than one carboxylic group then they are considered as acidic amino acids.
Amino acids are the simplest unit of a peptide chain. These amino acids are linked through peptide bonds and results in the formation of protein.
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Chapter 23 Solutions
EBK CHEMISTRY: PRINCIPLES AND REACTIONS
- 3. Propose a synthesis for the following transformation. Do not draw an arrow-pushing mechanism below, but make sure to draw the product of each proposed step (3 points). CN + En CNarrow_forward3) Propagation of uncertainty. Every measurement has uncertainty. In this problem, we'll evaluate the uncertainty in every step of a titration of potassium hydrogen phthalate (a common acid used in titrations, abbreviated KHP, formula CsH5KO4) with NaOH of an unknown concentration. The calculation that ultimately needs to be carried out is: concentration NaOH 1000 x mass KHP × purity KHP molar mass KHP x volume NaOH Measurements: a) You use a balance to weigh 0.3992 g of KHP. The uncertainty is ±0.15 mg (0.00015 g). b) You use a buret to slowly add NaOH to the KHP until it reaches the endpoint. It takes 18.73 mL of NaOH. The uncertainty of the burst is 0.03 mL.. c) The manufacturer states the purity of KHP is 100%±0.05%. d) Even though we don't think much about them, molar masses have uncertainty as well. The uncertainty comes from the distribution of isotopes, rather than random measurement error. The uncertainty in the elements composing KHP are: a. Carbon: b. Hydrogen: ±0.0008…arrow_forwardDon't used hand raiting and don't used Ai solutionarrow_forward
- How would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers? (a) CH3C=CCH3 || and CH3CH2C=CH (b) CH3CCH=CHCH3 and CH3CCH2CH=CH2 Problem 12-41 The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many structures as you can. (a) 100 Relative abundance (%) 80 60 60 40 200 20 (b) 100 Transmittance (%) 10 20 20 80- 60- 40- 20 40 60 80 100 120 140 m/z 500 4000 3500 3000 2500 2000 1500 Wavenumber (cm-1) 1000arrow_forwardPropagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.arrow_forwardDraw all resonance structures for the following ion: CH₂ Draw all resonance structures on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including charges where needed. The single bond is active by default. 2D ד CONT HD EXP CON ? 1 [1] Α 12 Marvin JS by Chemaxon A DOO H C N Br I UZ OSPFarrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningLiving By Chemistry: First Edition TextbookChemistryISBN:9781559539418Author:Angelica StacyPublisher:MAC HIGHER
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