Concept explainers
Videos
(a)
Interpretation:
The structural formulaof 2,3-dimethylpentane should be drawn.
Concept Introduction:
Alkanes can be classified as-
- Straight-chain alkanes
- Branched-chain alkanes
(a)
Answer to Problem 17A
Explanation of Solution
The given name of branched alkane is 2,3-dimethylpentane where pentane represents the parent carbon chain. For drawing the structure, firstly principal chain of five carbon atom is drawn and numbering is done. Then at position 2 and 3, methyl group is attached. After this, valency of each carbon is completed.
The structure of 2,3-dimethylpentane is:
(b)
Interpretation:
The structural formula of 2,4-dimethylpentane should be drawn.
Concept Introduction:
Alkanes are the saturated hydrocarbons which contain only C-H and C-C single bonds. The general formula of alkane is CnH2n+2. The simplest alkane among all alkanes is methane CH4.
Alkanes can be classified as-
- Straight-chain alkanes
- Branched-chain alkanes
(b)
Answer to Problem 17A
Explanation of Solution
The given name of branched alkane is 2,4-dimethylpentane where pentane represents the parent carbon chain. For drawing the structure, firstly principal chain of five carbon atom is drawn and numbering is done. Then at position 2 and 4, methyl group is attached. After this, valency of each carbon is completed.
The structural formula of 2,4-dimethylpentane is:
(c)
Interpretation:
The structural formula of 2,2-dimethylpentane should be drawn.
Concept Introduction:
Alkanes are the saturated hydrocarbons which contain only C-H and C-C single bonds. The general formula of alkane is CnH2n+2. The simplest alkane among all alkanes is methane CH4.
Alkanes can be classified as-
- Straight-chain alkanes
- Branched-chain alkanes
(c)
Answer to Problem 17A
Explanation of Solution
The given name of branched alkane is 2,2-dimethylpentane where pentane represents the parent carbon chain. For drawing the structure, firstly principal chain of five carbon atom is drawn and numbering is done. Then at position 2, two methyl groups are attached. After this, valency of each carbon is completed.
The structural formula of 2,2-dimethylpentane is:
(d)
Interpretation:
The structural formula of 3,3-dimethylpentane should be drawn.
Concept Introduction:
Alkanes are the saturated hydrocarbons which contain only C-H and C-C single bonds. The general formula of alkane is CnH2n+2. The simplest alkane among all alkanes is methane CH4.
Alkanes can be classified as-
- Straight-chain alkanes
- Branched-chain alkanes
(d)
Answer to Problem 17A
Explanation of Solution
The given name of branched alkane is 3,3-dimethylpentane where pentane represents the parent carbon chain. For drawing the structure, firstly principal chain of five carbon atom is drawn and numbering is done. Then at position 3, two methyl groups are attached. After this, valency of each carbon is completed.
The structural formula of 3,3-dimethylpentane is:
Chapter 20 Solutions
World of Chemistry
- There are 48 pairs of students in the following table. Each pair has quantitatively determined the mass of taurine in a 250 mL can of the popular energy drink marketed as “Munster” using High Performance Liquid Chromatography (HPLC). The class results are presented below: QUESTION: Summarise and report these results including an indication of measurement uncertainty. In both calculation samples calculate if an outlier is present, max value, number of samples, mean, standard deviation, g (suspect), g (critical) and t (critical). Mass of Taurine (mg) Mass of Taurine (mg) (Table continued) 152.01 152.23 151.87 151.45 154.11 152.64 152.98 153.24 152.88 151.45 153.49 152.48 150.68 152.33 151.52 153.63 152.48 151.68 153.17 153.40 153.77 153.67 152.34 153.16 152.57 153.02 152.86 151.50 151.23 152.57 152.72 151.54 146.47 152.38 152.44 152.54 152.53 152.54 151.32…arrow_forwardIndicate the rate expressions for reactions that have order 0, 1, and 2.arrow_forwardPROBLEMS Q1) Label the following salts as either acidic, basic, or neutral a) Fe(NOx) c) AlBr b) NH.CH COO d) HCOON (1/2 mark each) e) Fes f) NaBr Q2) What is the pH of a 0.0750 M solution of sulphuric acid?arrow_forward
- 8. Draw all the resonance forms for each of the fling molecules or ions, and indicate the major contributor in each case, or if they are equivalent (45) (2) -PH2 سمة مدarrow_forwardA J то گای ه +0 Also calculate the amount of starting materials chlorobenzaldehyde and p-chloroacetophenone required to prepare 400 mg of the given chalcone product 1, 3-bis(4-chlorophenyl)prop-2-en-1-one molar mass ok 1,3-bis(4-Chlorophenyl) prop-2-en-1-one = 277.1591m01 number of moles= 0.400/277.15 = 0.00144 moles 2 x 0.00 144=0.00288 moves arams of acetophenone = 0.00144 X 120.16 = 0.1739 0.1739x2=0.3469 grams of benzaldehyde = 0.00144X106.12=0.1539 0.1539x2 = 0.3069 Starting materials: 0.3469 Ox acetophenone, 0.3069 of benzaldehyde 3arrow_forward1. Answer the questions about the following reaction: (a) Draw in the arrows that can be used make this reaction occur and draw in the product of substitution in this reaction. Be sure to include any relevant stereochemistry in the product structure. + SK F Br + (b) In which solvent would this reaction proceed the fastest (Circle one) Methanol Acetone (c) Imagine that you are working for a chemical company and it was your job to perform a similar reaction to the one above, with the exception of the S atom in this reaction being replaced by an O atom. During the reaction, you observe the formation of three separate molecules instead of the single molecule obtained above. What is the likeliest other products that are formed? Draw them in the box provided.arrow_forward
- 3. For the reactions below, draw the arrows corresponding to the transformations and draw in the boxes the reactants or products as indicated. Note: Part A should have arrows drawn going from the reactants to the middle structure and the arrows on the middle structure that would yield the final structure. For part B, you will need to draw in the reactant before being able to draw the arrows corresponding to product formation. A. B. Rearrangement ΘΗarrow_forward2. Draw the arrows required to make the following reactions occur. Please ensure your arrows point from exactly where you want to exactly where you want. If it is unclear from where arrows start or where they end, only partial credit will be given. Note: You may need to draw in lone pairs before drawing the arrows. A. B. H-Br 人 C Θ CI H Cl Θ + Br Oarrow_forward4. For the reactions below, draw the expected product. Be sure to indicate relevant stereochemistry or formal charges in the product structure. a) CI, H e b) H lux ligh Br 'Harrow_forward
- Arrange the solutions in order of increasing acidity. (Note that K (HF) = 6.8 x 10 and K (NH3) = 1.8 × 10-5) Rank solutions from least acidity to greatest acidity. To rank items as equivalent, overlap them. ▸ View Available Hint(s) Least acidity NH&F NaBr NaOH NH,Br NaCIO Reset Greatest acidityarrow_forward1. Consider the following molecular-level diagrams of a titration. O-HA molecule -Aion °° о ° (a) о (b) (c) (d) a. Which diagram best illustrates the microscopic representation for the EQUIVALENCE POINT in a titration of a weak acid (HA) with sodium. hydroxide? (e)arrow_forwardAnswers to the remaining 6 questions will be hand-drawn on paper and submitted as a single file upload below: Review of this week's reaction: H₂NCN (cyanamide) + CH3NHCH2COOH (sarcosine) + NaCl, NH4OH, H₂O ---> H₂NC(=NH)N(CH3)CH2COOH (creatine) Q7. Draw by hand the reaction of creatine synthesis listed above using line structures without showing the Cs and some of the Hs, but include the lone pairs of electrons wherever they apply. (4 pts) Q8. Considering the Zwitterion form of an amino acid, draw the Zwitterion form of Creatine. (2 pts) Q9. Explain with drawing why the C-N bond shown in creatine structure below can or cannot rotate. (3 pts) NH2(C=NH)-N(CH)CH2COOH This bond Q10. Draw two tautomers of creatine using line structures. (Note: this question is valid because problem Q9 is valid). (4 pts) Q11. Mechanism. After seeing and understanding the mechanism of creatine synthesis, students should be ready to understand the first half of one of the Grignard reactions presented in a past…arrow_forward
ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
ChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill Education
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill Education
Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY