Chemistry Questions and Answers June 27, 2020

Make a comparison between the oxides of Sulfur and Nitrogen. With the following content: a- The important aspects concerning chemistry b- Possible effects on Health and Environment c- Forms of generation and/or synthesis d- Reaction to water e- Reaction against basic media or solutions f- Oxidizing and/or reducing behavior

Explain why these changes occur when mixing these metals from the table below with lead acetate include the chemical reactions of each reaction. Lead Acetate Dissolution Test Lead Acetate Solution Assay Metal Reaction Evidence Magnesium tape dissolves partially Mg Al Some bubbles on the surface of the metal Ag Nothing Cu No reaction Zn A

What are the Possible isomers of C10H14? And C3H3Cl?

Regulation of metabolism at the organism level metabolic adaptation in stress, physical exercise and pregnancy Explain briefly

A group of chemists is monitoring 20 different locations of a river for its biochemical oxygen demand (BOD). BOD (ppm) 26 88 45 15 16 7 77 19 33 30 50 60 19 80 23 66 55 31 107 17 a. If we consider these 20 locations to be the population of interest, what is the mean of the population b. The chemists are planning to choose 5 sampling points

Car buyers often add accessories to their new cars. A sample of 179 Mini Cooper purchasers yielded a sample mean of Php. 5,000 worth of accessories added to the purchase above the Php. 20,200 base sticker prices. Suppose the cost of accessories purchased for all Minis has a standard deviation of Php. 1,500. a. Calculate a 95 confidence interval

Calculate the formula weight of an unknown copper compound from this data that a student collected. (Assume 1 Cu atom per formula unit.) mass of the test tube and unknown sample mass of test tube without the unknown sample mass of filter paper mass of filter paper and copper 14.603 g 13.437 g 0.633 g 1.096 g

The decomposition of SO2Cl2 is first order in SO2Cl2 and has a rate constant of 1.42*10^-4 1/s at a certain temperature. How long will it take for the reaction to be 75.0% complete?

The equilibrium constant (Ke) for this reaction is 1.60 at 990 C H(2) CO,(g) H2O(g) CO(g) Calculate the number of moles of each component in the final equilibrium mixture obtained from adding 1.00 mol of H2, 2.00 mol of CO2, 0.750 mol of H20, and 1.00 mol of CO to a 5.00L container at 990 C.

Calculate the number of moles (of molecules) in the following samples. (A) 10.32 g H20 0.5729 mole (B) 16.54 g benzene, C5H6 X mole (C) 36.12 g ethyl alcohol, C2H5OH 0.784 mole (D) 5.88x1024 molecules CO2 X mole (E) A sample of Co, that contains 6.10x1022 o atoms X mole What is the molar mass of cholesterol if 0.572 mol weighs 221.19 g? Hint: What

Draw the structures of the cis-trans isomers for each compound. Label them cis and trans. If no cis-trans isomers exist, write none. a. 2,3-dimethyl-2-pentene b. 1,1-dimethyl-2-ethylcyclopropane c. 1,2-dimethylcyclohexane d. 5-methyl-2-hexene e. 1,2,3-trimethylcyclopropane

Propose multistep synthetic route for the following transformations. You can use whatever chemical reagent to facilitate the reactions. Detailed reaction condition of solvent or temperature is not needed, but the key reagents must be provided (such as NaOH, HCI, NABH4, etc.) (16 pt) (1) HO HO, EtO OEt Br (2) H3N .N CO2 H3N H3N .CO2 AlaLeu

If x = molar solubility, K sp = solubility product, which of the following compounds would have the relationship: 27x4 = K sp ? a) Bi2S3 b) Ag2CO3 c) AgCl d) PbI2 e) Ag3PO4

Calculake the hydroxide 1on conantration in a 0.010 M Soluh on uF banum hydroxidu , BalOH)2

64. How many stereocenters (chiral centers) are present in this molecule H3C CH3 B. 3 A. 4 . 2 D. I CI CHCH3 65. Which of the following is a reaction diagram for an S1 reaction that is endothermic A. 13. D. 66. From the data given in the righthand box, what is the specific rotation of the alcohol produced in the Sn2 reaction shown below Data OH OH

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A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 5.00 mol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long will take for the amount of radionuclide in each sample to decrease to 132 of the initial amount.

1. Calculate the E factor and the atom economy of this reaction. H2O2 H20 E factor Atom economy

If 1.40 mol of SO2 and 3.13 mol of O2 are used to form SO3, how many moles of excess reactant will be left over 2SO2(g) O2 (g) 2SO3 (g) Molar Masses 64.07 gmol 32.00 gmol 80.07 gmol O 1.73 mol 2.43 mol O 4.86 mol 0.700 mol 6.26 mol

Carbolic acid, CH,OH, has a K, of 1.3 x 101 at 23 C. 1) Write the chemical equation corresponding to the K, reaction for carbolic acid. ii) Calculate the pH of a 0.15M solution of carbolic acid.

When limestone (solid CaCO3) is heated, it decomposes into lime (solid CaO) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete the lime absorbs CO2 from the air and turns back into hard, durable limestone. Suppose some calcium

In the NMR of your product you were able to see a singlet at 10 ppm, what conclusion can you make? The product is 4-methoxybenzalecetophenone, created by an aldol condensation reaction using benzaldehyde and 4-methoxyacetophenone. a. This corresponds to the deuterated solvent b. This corresponds to product c. You broke the NMR, nothing shifts that

The active ingredient in a zinc nutritional supplement is Znso4 7H20 (molar mass 287.58 gmol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were ground and mixed together thoroughly. The total mass of these ten tablets was 10.830 g. A 2.402 g sample of the finely ground tablets was dissolved in an acidic

Given a Greenshields linear density speed-relationship, S = 55.0 - 0.45 D. Flow-speed relationship is Flow=1100S-S^2/g and flow-density relationship is Flow=55D-0.45D^2 What are the values for the following: a) free flow speed __________________________ b) jam density ____________________ c) capacity _______________________

Perform the electron configuration and indicate the four quantum numbers of the following species: Cu-29, K-19, 16 S 2- . 26 Fe 3+ .

Consider the following relations, using this information, answer the following question CARS Brand Model Plate MKL902 AGP898 Trooper CLK240 KRI930 Mercedes ML320 IRI123 Toyota Corolla GRU092 Toyota Corolla ERL102 Mazda Mazda3 PIN774 Toyota Tercel Mazda RX8 Isuzu BMW 325i ACCIDENTS Plate c. 40 d. 288 License Date Road MKL902 32188 022001 PR100

The infrared (IR) spectrum of carbon monoxide 12C160 in the gas phase shows a multiplet structure that arises from the contributions of both vibrational and rotational energies. The spectrum consists of two branches, or families of peaks. An R branch that lies at higher energy and a Pbranch that is resolved at lower energies. a) Construct a

2) (10 points) A unique aspect of angular momentum in quantum mechanics is that it is quantized in both value and space. Over the past two weeks, we have learned about electron spin an intrinsic angular momentum that is described by 2 states for a single electron, a and . Using the eigenvalues of S and S along with the expectation values of S,

Determine the expectation value of r for the electron of an excited hydrogen atom if it is in a 4f orbital. The normalized radial function for 4f is 32 1 R,(r) eiha,. You can leave your answer in terms of ao. 64V7( a, a ,3b) Estimate the rotational kinetic energy of the electron described in part a. Recall from general physics that rotational

4b) Rewrite the value of a you determined in answering part a as a function of the 4Te h ( me Bohr radius, ao. (a ,4 (25 points) a) Use the variational method to determine the ground state energy of the hydrogen atom starting with the trial function (r)e , where a is the variational parameter andr has its usual meaning in spherical coordinates.

The orbital energies for Ne and Ar determined by the HartreeFock Self Consistent Field method are given in the table below. Ne Orbital E, (kJmol) 1s 86.0 2s 5.06 2p 1.94 Ar Is 311.35 2s 32.35 2p 25.12 3s 3.36 3p 1.65 a. Estimate the first ionization enerav for each element. b. Explain the trend in ionization energy you obtained in part a. (Which

In the next reaction 4 HCI (g) O2 (g) 2 2C2 (g) 2H20 (g) Predict in which direction equilibrium moves when the following changes are made 1 Increase pressure. 2 Reduce the pressure. 3Reduce the water concentration.

In the next reaction 4 HCI (g) O2 (g) 2 2Ch (g) 2H,0 (g) Predict in which direction equilibrium moves when the following changes are made a) Increase the concentration of HCI. b) Reduce the oxygen concentration. c) Increase the chlorine concentration.

In the next reaction 4 HCI (g) O2 (g) 2 2C2 (g) 2H20 (g) Predict in which direction equilibrium moves when the following changes are made 1 Increase pressure. 2 Reduce the pressure. 3Reduce the water concentration.

In the next reaction 4 HCI (g) O2 (g) 2 2Ch (g) 2H,0 (g) Predict in which direction equilibrium moves when the following changes are made a) Increase the concentration of HCI. b) Reduce the oxygen concentration. c) Increase the chlorine concentration.

Water can make ice but kerosene cannot. Explain with reasons

Using the equation: Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2(g) (a) Show that this is a redox reaction. Which species is oxidized, and which is reduced? (b) How many moles of Fe2O3 are required to produce 38.4 mol of Fe? (c) How many grams of CO are required to produce 38.4 mol of Fe? Lead(II) nitrate and aluminum chloride react according to the following

Consider the substance, ethylene glycol. The vapor pressure at 100 C is 14.9 mmHg. The enthalpy of vaporization is 58.9 kJ/mol. what is the vapor pressure of ethylene glycol at 125 o C?

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a) Give a definition of lattice energy. Does your definition mean that the associated enthalpy of reaction will be positive or negative (b) Use the BornLand equation to calculate a value for the lattice energy of KBr, for which ro 328 pm. KBr adopts an NaCl structure other data may be found in Tables 6.3 and 6.4. ,for a the owly and unc writ ture

i. Construct Molecular Orbital diagram for C 2 -2 ii. Write the electron configuration for C 2 -2 iii. Identify the magnetism for C 2 -2 iv. State the HOMO and LUMO for C 2 -2 v. Calculate the bond order for C 2 -2 vi. Given the bond order for C 2 +2 is 1. Compare the bond strength and bond length between C 2 -2 and C 2 +2

1. The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0 C, 6.7 H, and 53.3 O. A solution of 0.650 g of the solid in 27.8g of the solvent diphenyl gave a freezing point depression of 1.56C. Calculate the molar mass and molecular formula of

1. The following results were obtained when each of a series of standard silver solutions was analyses by flame atomicabsorption spectrometry. 25 Concentration, ng mL 1 Absorbance 5 10 15 20 30 0.003 0.127 0.251 0.390 0.498 0.625 0.763 Determine (present answers using both manual calculations and Excel generated result) the slope and intercept of

woite reasonable cusued arow mechanism LOA, Thf,782 R

Find the major organic product for the following reaction NaOEt, E1OH

Sort the following metal activity series in decreasing order: Na, Mg, Al, Zn, Pb, Cu.

Write the dissociation reaction and the corresponding base for ketone and 2,4 pentdione. Compare the both acidity.

What is the product of the following reactions?

CH3 1. (CH3),CuLi 2. H, 1. H,MgBr 2. H, H3C CH3 ,CH3 1. (CH3),CuLi 2. H, 1. H,MgBr 2. H, H3C CH3 ,CH3 1. (CH3),CuLi 2. H, 1. H,MgBr 2. H, H3C CH3 ,CH3 1. (CH3),CuLi 2. H, 1. H,MgBr 2. H, H3C CH3 ,CH3 1. (CH3),CuLi 2. H, 1. H,MgBr 2. H, H3C CH3

Predict the major products of the following reactions:

(a) (a) HPd (h) (h) NH,, ter (b) KMNO, (b) H,O (i) 1. Na (i) (c) HO, 2. CH,I 1. HNO,, H,SO, 2. Fe, H (c) Br 1. Mgter 2. CO, 3. HH,O G) (d) CH,CH,CH,CI (d) AICI, OCH3 (k) (e) Br Cl, FeCl, (k) Mg, ter (e) A 2. H,0. H (f) 1. CH,COCI AICI, (1) (f) 2 CH,OH 2. Zn(Hg), HCl, (1) HCI como catalisador (g) (m) H3C AICI OH PPC (g) (m) CH,CI,

Write the semi-developed formula of the following alkenes: a. 2-heptene b. 1,3,5-heptatriene c. 1,3-pentadiene

Write semistructural formula of 1,2-dibromoethene.

The following results were obtained when each of a series of standard silver solutions was analyses by flame atomicabsorption spectrometry. Concentration, ng mL 1 Absorbance 10 15 20 25 30 0.003 0.127 0.251 0.390 0.498 0.625 0.763 Determine (present answers using both manual calculations and Excel generated result) the slope and intercept of the

What is the Common name of (CH3)2C(Cl)CH(OH)CH2CH3?

Supply the identities of each of the following unknowns, A F, by understanding what is taking place in the reactions. Brz NaOH A B C D hv H E F

Which of the following best describes the amine (CH 3 CH 2 ) 3 N? a) Secondary, simple b) Secondary, mixed c) Tertiary, simple d) Tertiary, mixed

Consider the equilibrium NO2 (9) NO (9) O2 (9) One mole of NO2 is placed in a vessel and allowed to come to equilibrium at a total pressure of 1 atm. Analysis shows that 700 K 0.872 800 K 2.50 PNo PNO2 a. Calculate Kp at 700K and 8O0K b. Calculate AG and AH

At 25C, for the reaction Br2 (g) 2Br (g) We have AG 161.67 kJmol, and AH 192.81 kJmol a. Compute the mole fraction of bromine atoms present at equilibrium at 25C and P 1 atm b. At what temperature will the system contain 10 mol percent bromine atoms in equilibrium with bromine vapor at P 1 atm.

A firm sells its product to two groups of customers. Demand from group 1 is Q; = 100, 000 5,000P, and demand from group 2 is @2 = 140, 000 10, O0OP. a) Find the total demand that the firm faces for its product. Explain it first using pictures (you dont have to draw them to scale; I just want you to see how to proceed) and then do the algebra.

At 25C, the density of a 50 percent by mass ethanol/water solution is 0.914 g/cm. Given that the partial molar volume of water in the solution is 17.4 cm/mol, what is the partial molar volume of ethanol?

Suppose that 2.0 mol H 2 at 2.0 atm and 25 C and 4.0 mol N 2 at 3.0 atm and 25 C are mixed at constant volume. Calculate mixG . What would be the value of mixG had the pressures been identical initially?

Derive the formula for the Gibbs energy of mixing, AGmx, using the equations for chemical potentials, Dalton's Law and mole fraction.

What is correct? I) Activation of fatty acids to Acyl-CoA requires 2 ATP. II) Acyl-CoA dehydrogenase ensures the reduction of a FAD to FADH2. III) The product of acetyl-CoA carboxylase activates carnitine acyl transferase 1 (CAT-1). IV) Thiolase is a mitochondrial enzyme.

What is correct about C18:1 12 fatty acid catabolism? I) C18:1 12 fatty acid will undergo 2 beta-oxidation cycles before the action of enoyl-CoA isomerase (double elimination). II) C18:1 12 fatty acid will undergo 6 beta-oxidation cycles before the action of enoyl-CoA isomerase (double elimination) III) Compared to C20:0 arachidic acid catabolism,

The reaction of C4H10 with oxygen produces carbon dioxide and H20, according to the following reaction C,H10 02 CO2 H20 Balance the chemical equation and determine a) How many liters of C02 can be obtained in normal conditions from 250g of C4H10 b) How many mL of C02 can be obtained from 78 grams of 02 under normal conditions c) How many moles

The reaction of C2H6 with oxygen produces carbon dioxide and H20 according to the following reaction C2H6 02 CO2 H20 Balance the chemical equation and determine a) How many liters can be obtained under normal conditions of 02 from 250g of C2H6 b) How many mL of C02 can be obtained from 78 grams of 02 under normal conditions c) How many moles of

The reaction of iron (II) sulfide in the presence of oxygen produces Fe203 and S02 according to the following reaction Fes 02 Fe203 S02 Balance the chemical equation and determine a) How many grams of 02 will be obtained from 200 grams of S02 b) How many grams of FeS will be obtained from 345 grams of Fe203 c) How many moles of S02 will be

The reaction of Zinc in the presence of hydrochloric acid produces ZnCl2 and H2 according to the following reaction Zn HCI ZnCl2 H2 Balance the chemical equation and determine a) How many grams of Zn will be obtained from 48 grams of HCl b) How many grams of ZnCl2 will be obtained from 96 grams of H2 c) How many moles of Zn will be obtained from

The reaction of C3H8 with oxygen produces carbon dioxide and H20 according to the following reaction C3H3 02 CO2 H20 Balance the chemical equation and determine a) How many grams of 02 will be obtained from 250 grams of C3H8 b) How many grams of C02 will be obtained from 78 grams of 02 c) How many moles of 02 will be obtained from 300 grams of

The reaction of nitrogen gas in the presence of hydrogen produces ammonia according to the following reaction N2 H2 NH3 Balance the chemical equation and determine a) How many moles of N2 will be obtained from 4.27 moles of NH3 b) How many moles of NH3 will be obtained from 3.8 moles of H2 c) How many moles of H2 will be obtained from 6.5 moles

The reaction of hydrogen gas in the presence of oxygen produces water according to the following reaction H2 02 H20 Balance the chemical equation and determine a) How many moles of 02 will be obtained from 1.26 moles of H20 b) How many moles of H20 will be obtained from 55.7 moles of H2 c) How many moles of 02 will be obtained from 3.40 moles of

The reaction of iron with oxygen produces hydrogen dioxide (I) according to the following reaction Fe 02 Fe203 Balance the chemical equation and determine a) How many moles of Fe203 will be obtained from 2.75 moles of Fe b) How many moles of Fe203 will be obtained from 31 moles of 02 c) How many moles of 02 will be obtained from 8.9 moles of Fe

Ethanol (C2H50H) is produced from the fermentation of sucrose in the presence of enzymes. C12H2201(ac) H,0(g) C2HOH(1) CO2(g) a) Determine the theoretical yield and the percentage yield of ethanol if 684 g of sucrose is fermented and 349 g of ethanol is obtained.

An alkaline battery produces energy, according to the following equation Zn(s) Mn02(s) H20(1) Zn(OH)2(s) Mn203(s) a) Determine the limiting reagent if 25 g of Zn and 30 g of MNO2 are used. b) Determine the mass of Zn(OH)2 produced.

The reaction of solid sodium and iron (II) oxide is just one of a series of reactions that inflates a car bag. Na(s) Fe203(s) Na20(s) Fe(s) If 100 g of sodium and 100 g of fe203 are used in this reaction, determine. a) the limiting reagent b) excess reagent c) the mass of iron produced d) The excess reagent mass remaining after the reaction

A combustion reaction is carried out in which 2g of propane (C3H8) react with 7g of oxygen. a. Determine the limiting reagent. b. How many grams of reagent are left in excess?

It is an aliphatic ester, choose the best option: a. Methyl benzoate b. Isoamyl acetate c. Methoxy benzene d. Benzophenone

The hydrolysis of methyl acetate in a basic catalysis produces: a. sodium acetate and methanol b. acetic acid + ethanol c. methanol + methanoic acid d. acetic acid + formic acid

1. An ester is transformed into a new ester when the first one reacts with an alcohol, this process is called? a. Hoffman b. Saponification c. Transesterification d. Alcoholysis 2. Which of the following compounds represents an amide? a. Propanoic formic anhydride b. Ethyl acetate c. Urea d. Phenyl benzoate

1- In carboxylic acid derivatives, a key step in the Rx of the carbonyl group is: a- The addition of a nucleophile that generates a tetrahedral intermediate b- An aldehyde and ketone are presented as a good leaving group c- The use of a steric hindrance in the reaction d- The addition of a limiting reagent 2- It is an azo compound: a- chondroitin

1. When 1-chloro butane reacts with NH3, it produces: a- N-butyramide b- acetamide c- butylamine d- butyrolactam 2. The Grignard reaction with esters makes it possible to prepare: a- Primary alcohols without further reaction b- Secondary and tertiary alcohols c- Tertiary alcohols d- Primary alcohols

1. It is a tertiary amine: a) ethylamine b) trimethylamine c) triethylammonium chloride d) diphenylamine 2- The 5-hydroxypentanoic acid compound has a hydroxyl group on one carbon: a) Delta b) Beta c) gamma d) Alpha

1. Reacting propanoyl chloride with ethanol forms: a- Chloroacetic acid b- Fluorpropanoic acid c- N-propyl ethanoate d- Ethyl propanoate 2. P-toluidine is an amine: a- Primary b. High school c. Quaternary d. Tertiary

1. Which of the following is an acid anhydride: a- Benzoic anhydride b- 2,2 dimethyhexanamide c- Acyl phosphate d- Anhydrous Acetyl Chloride 2. Chemical test that distinguishes primary and secondary from tertiary amines: a- Hinsberg b- Hoffman c- Tollen's d- Sandmeyer

1. Carboxylic acid derivative obtained when benzoic acid reacts with ethanol: a- methyl benzoate b- ethyl benzoate c- phenyl acetate d- benzyl acetate 2. The Alcoholysis reaction with an acid derivative generates the group: a- Ester b- Primary alcohol c- Aldehyde d- Water

Balances the following redox reactions a) Put the oxidation numbers of each element. b) Write the halfreactions and indicate in each case which one oxidizes and which one reduces. 1. HNO3 NO H20 O2 2. KCIO3 S KCI SO2

Balances the following redox reactions a) Put the oxidation numbers of each element. b) Write the halfreactions and indicate in each case which one oxidizes and which one reduces. 1. H2S HNO NO S H20

When calcium carbonate is heated, it decomposes producing calcium oxide and carbon dioxide. Determine: a. Write the balanced equation. b. Determine the theoretical yield of carbon dioxide if 235 g of calcium carbonate are heated. c. What is the percentage yield of carbon dioxide if 97.5g of CO2 are collected?

Balances the following redox reactions a) Put the oxidation numbers of each element. b) Write the halfreactions and indicate in each case which one oxidizes and which one reduces. 1. Cus HNO3 Cu(NO3)2 S NO H20

Balances the following redox reactions a) Put the oxidation numbers of each element. b) Write the halfreactions and indicate in each case which one oxidizes and which one reduces. CrCl3 MnO2 H2O MnCl2 H2CrO4

An analyst has attempted to optimise a chromatographic process by alteration of the operating conditions. Retention times (min) were determined in replicate, the chromatographic data obtained are given in Table 1. Use appropriate statistical tests to determine whether the retention times obtained for run 2 are statistically higher than those

The following results were obtained when each of a series of standard silver solutions was analyses by flame atomicabsorption spectrometry. Concentration, ng mL 10 15 20 25 30 Absorbance 0.003 0.127 0.251 0.390 0.498 0.625 0.763 a. Determine (present answers using both manual calculations and Excel generated result) the slope and intercept of the

1. Fatty acids are. hydrocarbon tail is hydrophobic. compounds because the carboxyl group is hydrophilic and the 2. When an organism uses fatty acids, the ester linkages of triacylglycerols are hydrolyzed by enzymes called 3. When a base such as sodium hydroxide or potassium hydroxide is used, the products of the reaction, which is called. fatty

An electron in two different states of an atom is known to have j 32 and 12, What is its orbital angular momentum quantum number in each case What are the allowed total angular momentum quantum numbers of a composite system in which j1 5 and j2 3

The coefficients of static and kinetic friction between a 389 N crate and the warehouse floor are 0.515 and 0.370, respectively. A worker gradually increases his horizontal push against this crate until it just begins to move and from then on maintains that same maximum push. what is the acceleration of the crate after it has begun to move?

At 47 C the vapor pressure of ethyl bromide is 10 mmHg, while that of ethyl chloride is 40 mmHg. Assume that the mixture is ideal. If there is only a trace of liquid present and the mole fraction of ethyl chloride in the vapor is 0.80, a) What is the total pressure and the mole fraction of ethyl chloride in the liquid b) If there are 5 mol of

What is the chemical formula of water?

Create a synthesis that will include a Jones, Cuprate, Oxymercuration, Hydrogenation, and a Methyl shift.

20pts 3)Ereate a syuthens Hat eill machdea Inwes Cuprate, orymecmeation, Hydrogewation and a Methyl shift.

Given C 7 H 16 O 2 , draw structure

4)2epta IR 100 peak NHR Shift Int oplit 6H SiNglet 4H quartet 6H triplet Draw structure 4.0 2.5 1.3

26.36ML 13.15 mL 26.410 mL 26,40 mL 13.20 mL Volume at equivalence point Volume at onehalf equivalence point pK a 13.20mL pKa pKa Ka K. Ka Standard deviation of K, Average K. (show calculations)

Draw structure given this data. explain how you came up with the structure.

4)2epta IR 100 peak NHR Shift Int oplit 6H SiNglet 4H quartet 6H triplet Draw structure 4.0 2.5 1.3

Given the structure, assign SHIFT, INT, and SPLIT: explain why you chose your shift numbers.

2opts. GueNs AsanNa Shift Ixt. splitting H.

What will be the freezing temperature of a solution prepared by dissolving 4,000 mL of 1,2-ethanediol [(CH 2 CH 2 )(OH) 2 ; density= 1.12 g / mL] with 8 L of water? At what temperature will this solution boil. Kc = 0.52 C-kg / mol ; Keb = 0.52 kg -C *1 / mol -1 .