Chemistry Questions and Answers June 07, 2020

What is the constant molar absorptivity of sucrose? For spectrometry

Explain the different types of sampling methods. Conducting a research study and hypothesize that adult learners who are completing their degrees online have a better educational experience than adult learners who are completing their degrees in face-to-face classroom settings. Test the hypothesis and obtain a sample of online adult learners and a

The molar solubility of AgPO4 is 5.63 107 molL. Calculate the solubility product, Ksp, of Ag3P04. You should get one of the following answers O 1,0. 1025 O 3, 2. 1013 O 9,5. 1013 O 1,8 1019 O 2,7. 1024 O 4,8. 1018

You have a stock solution containing 1.25 mM of substrate in borate buffer pH 9.5. You transfer 1.25 mL of this stock into a cuvette and then add 250 ul of enzyme solution to initiate the reaction. What will be the final concentration of substrate in the cuvette following addition of the enzyme O 1042 mM O 1.25 mM O 0.00625 mM O 1.04 mM O 3750 mM

Does a reaction occur when aqueous solutions of barium hydroxide and sodium nitrate are combined Oyes Ono If a reaction does occur, write the net ionic equation. Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds. Be sure to specify states such as (aq) or (s). If a box is not needed leave it

1B. (1) A batch adsorption study was performed to characterize the performance of an adsorbent (activated carbon) for the adsorption of an organic chemical A present in wastewater. The adsorption data is represented in figure 1. In(Wa3) 6.5 6 5.5 5 4.5 4 3 v1.1788x 0.0314 R0.96474 3.5 4.5 In(rhoA2) Figure 1. Adsorption fit 4 5 5.5 6 RhoA2 (x

Malic acid (C 4 H 6 O 5 ) is one of the alpha hydroxy acids which is naturally found in apples. The reaction of hydrochloric acid with sodium maleate to form malic acid and sodium chloride is according to the following equation: HCl + C 4 H 5 O 5 Na ------> C 4 H 6 O 5 + NaCl You have been asked to prepare a maleate buffer (K a = 3.908 x 10 -4

VII.(10).At 25C the total volume V(cms) of a solution formed from MX salt and1.000 kg of water fits the expression V 1001.21 34.69( n 0.070)2 Calculate a) the partial molar volume of the salt b) the partial molar volume of water.in a solution of molality, m (m n 0.100 mol kg).

A buffer is made of 0.015 M sodium formate (HCOONa) and 0.025 M formic acid (Ka = 1.77 X 10-4) with a total volume of 100.00 mL. How many millilitres of 0.200M HCl can be added to this buffer before the buffers pH changes by 1.00?

What mass of H2 should be produced by the reaction of Al with 75.0 mL of 2.95M HCl?

NaHCO can deprotonate benzoic acid but cannot deprotonate phenol. On the other hand, NaOH can deprotonate both benzoic acid and phenol. Given this information, rank the molecules numbered I to V in order of decreasing acidity. COH COH H,0 H,CO, IV CH, CH3 II I II (A) V II I III IV () II 1 V III IV (C) II V I IV II

Which will be the best oxidizing agent among the following 3 I. Au 3e Au 1.50 V II. Ag e Ag 0.80 V 2 III. Pb 2e Pb 0.13 V IV. Li e Li 3.04 V (A)I () I () (D)IV

Find the critical values, x 2/r and x2/l, for c=0.98 and n=20

Calculate the drug content in the analyzed sample, considering the procedure described in the item "Determination of the propranolol content", including the concentration of the standard and the dilution of the sample, and the data below: Ap = 0.387 Aa = 0.464 sample mass (crushed tablets) = 220 mg Average weight = 197.97 mg

A bottle contains a mix of three amino acids in citrate buffer (pH 3.5). The amino acids in solution are Lysine, Valine, and Aspartate. If a cation exchange column was set up and equilibrated with citrate buffer (pH 3.5) state which amino acid(s) would bind to the column and which amino acid(s), if any, woul through the column. Explain your

You need to determine if an unknown sample (called here Unknown sample X) contains reducing sugar. You know that at least three tubes are required Tube ANegative control Tube B Positive control Tube C Test tube Please state which solutions should go into each tube in order for this experiment to indicate the presence of reducing sugar in the

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2(g)C(s) CS2(g)Kc9.40 at 900 K How many grams of CS2(g) can be prepared by heating 15.0 mol S2(g) with excess carbon in a 9.35 L reaction vessel held at 900 K until equilibrium is attained

A metal M exists in two forms Mb and Ma (b a). When a current of 2 A is passed through a 1L aqueous solution of 0.01 M Mb for 965 s, 0.005 mol of the metal was deposited at the cathode while the concentration of Ma in solution was found to be 0.005 M. Assuming that the reduction process takes place stepwise and equal moles of electrons are

In a spinel structure AB204, the divalent cations A2 occupy x of the tetrahedral voids while trivalent cations B3 occupy y of the octahedral voids and z of the tetrahedral voids. Then the value of (y zx) is Answer 0 01 02 O3 04 05 O6 07 8 09 Select your answer from radio buttons.

Calculate the ratio of mole fractions of N2 to 02 dissolved in water at 25C from air to the nearest integer. Given K 3.25x10 atm K 6.5x10 atm (K Henrys law constant) Answer 1 02 3 4 05 06 07 8. 6.

Consider the zinc blende structure formed by the sulphide ions occupying the FCC lattice points and zinc ions occupying some of the tetrahedral voids. Select the correct statement about the crystal assuming it to be ideal. The coordination number of Zn2 and S2 is same and equal to 4 The contribution of the S2 ions towards the packing efficiency is

A hydrodynamic voltammetry experiment from 0.3 V to 0.3 V for the reaction of Fe2 Fe e produced a half wave potential of 0.0100 V versus SCE (E,ref 0.2444 V) in a stirred solution. Assuming the initial solution concentrations are afe 8. 0.00 and ar2 1.00 x104, Sketch the waveform and voltammogram with axis labeled, and a box diagram with the

A. Draw a Jablonski (energy level) diagram and use it to explain why absorption and emission spectra often look like mirror images of each other. B. What peaks would you expect to see in the mass spectrum of the ketone CH3(CH).CO(CH2)SCH3 ionised by electron impact ionisation and why

What physical property of the FDC dyes is the basis of the resolutions you will perform in this experiment the dyes ability to dissolve in the stationary phase of the ssystem the dyes color The dyes ability to dissolve in the mobile phase of the system The dyes relative attractions to the stationary and mobile phases of the chromatography system

Identify the redox reactions involved in nucleic acid metabolism. Explain microscopically.

Connider the Ce of two internction spit12 electrona Let the energy gab between the Ninglet and triplet states is A Shew that the auoeptibility for this aystem in piven by 2Ny

What is the IUPAC name of the following compound Br, H. H H3C Br CH2CH3

Name the following molecules (6) CH,CH, a) b) H,CCHCCHCilyCH, CH, CH3 c) CH CH3 d) HCCCH,CCH H, H3 CH2 CH, e) f) HCCCH,CH,CHCH,CHCH, CHCH, CH,CH,CH,

Derive the following relation.

A variety of Wronskian formulas can be developed, including H2 , v1 (2) v1 J,,HV) I,HD), J,,H2) 1,H2, 4 i 2 i 2 i

Which statement is correct about multiple performance obligation arrangements? a) the revenue must be allocated to the components of the sale evenly over the life of the contract b) the revenue must be recognized evenly over the life of the contract c) identifying the different sources of revenue increases the representational faithfulness d) the

A gas made up of fermions with spin 1/2 and mass m is located inside a cubic container with side L 0 . The walls of the container can absorb gas: on every unit of surface there are (an unknown number of) sites, to each of which one fermion with energy - 0 can get attached. The gas is so diluted that one can assume that << 0 , where refers

What are the names of the given compounds?

Br Br H3C CH3 CH, CH, CH, CH H3C CH3 Ci CI CI CH, CI CH3 Br H,C. CH3 CH, CI H,C H,C H,C CH Br CH3 H3C. CH H3C CH3 CH3 CH3 H3C Br Br CH3

Create Infographic for this topic, Stability of pharmaceuticals Under this topic, the following keywords/concepts should be covered in your infographic: - Types of stability - Strategies to overcome stability - Consequences of stability - Kinetics of instability its physiochemical principles.

A city's water supply is fluoridated by adding NaF. The desired concentration of F^- is 3.810410^-5 molal. How many milligrams of NaF should be added per gallon of treated water if the water supply is already 200ppb in F^-?

1. The complex ion Co(NH3)63 is orange, whereas Co(NH3)5Cl is violet. What calor would you predict for the complex Co(NH3)s(H2O)3 Why 2. Consider the isoelectronic complex ions MnO43, (FeO42, and CrO4. They show strong chargetransfer transitions at 233, 303, and 476 nm. Assign each transition to the corresponding complex. Would you expect the

A standard method for analyzing Asprin tablets has a known variance of 25. A sample of ten aspirin tablets is selected and analyzed for the amount of aspirin using a modified method, yielding the following results: 254,249,252,252,249,249,250,247,251,252. Determine whether the precision of the modified method is significantly different from that

Malic acid (C4H605) is one of the alpha hydrox acids which is naturally found in apples.the reaction of hydrochloric acid with sodium maleate to form malic acid and sodium chloride is according to the following equation: HCl+C4H505Na-------> C4H6O5 + NaCl You have been asked to to prepare as maleate buffer (Ka=3.90810^-4) using sodium maleate

calculate the concentration of 16.5 ml HCI.if 320 ml of hydrogen gas H2 would be generated, at 25 C and 1.2 atm pressure R0.0821 atm .Lmol.K Zn 2HCI(aq) ZnC12(aq) H2(g) (1 Point) 1.05 M 0.523 M 1.9 M O 1.2 M

The critical point coordinates of ethanol (46.068 g mol, d = 0.79 g mL) are known as 514 K and 62.18 atm, and the normal boiling point is 74.8 C. 2,442 mL of ethanol is placed in a 3.51 L container at 23 C and expected to equilibrate. What is the percent by mass of liquid ethanol remaining in the container relative to the initial total amount?

Fe2 is used as a catalyst for the oxidation of luminal by H,02. The resulting chemiluminescence increases linearly with Fe concentration. Exactly 1.0 mL of water was added to a 5.0mL sample of an unknown Fe2 solution, followed by 2.0 mL of H,0, and 1.0 mL of luminol. The chemiluminescence intensity was found to be 16.1. When 1.0 mL of 4.75 x 10 PM

Show the mechanism of this reaction and predict the stereochemical outcome of this reaction.

Me Me Me Me PHNCO NO2 only one isomer A. Kozikowski Coworkers, Tetrahedron Lett. 1982, 23, 2081.

Two solutions are mixed (1) 1 liter of 2mM H2PO4 and unknown Ca (distilled water to which 2mM NaH2PO4 and unknown concentration of CaClz were added). (2) 0.458 L of 10mM carbonate solution (distilled water to which CO32 was added). The resulting pH is 10.3. The CCPP of the mixture is 0. Determine the calcium concentration of the original phosphate

What makes stoichiometry relative to the amounts of reactants and products in chemical reactions?

What is the relationship of gas effusion to molar mass?

How to find and calculate from the graph obtained 1) Ecorr 2) Log icorr 3) icorr 4) Corrosion rate

0.5M HCL (Tafel) 1 2 3 4 5 6 7 8.00E01 7.00E01 6.00E01 5.00E01 4.00E01 3.00E01 2.00E01 1.00E01 0.00E00 12 W C 4x ENG HUAWEI

In which of the following does the nitrogen atom have a formal charge of 1 a. d. N H. HN 0 Select one a. e b. c . d. a . d EO

The absorbance data pertaining to rate of aquation of complex Co(NH3)sCICl2 were. collected in 100 mL aqueous acidic solution. How you would explain the phenomenon Molarity of HNO3 0.1 M (red line in the graph) and 0.3 M (black line in the graph). Acid Concentration Vs Absorbance of the complex solution 12 0.4 02 10 20 30 40 50 70 Time in Min

A 20.00 ml. unknown solution containing Ni was titrated at a suitable pll and required 40.50 unL of 0.100 M EIDITA to reach the end point. Caleulate the molar concentration of NI (58.69 gmol) L01025 M 2 00 450 M 3. 00874 M 4. C0 202 M Ativite Wodaws

Explain the relationship of gas effusion to molar mass.

Calculate the number of moles of oxygen atom (0) are there in 0.25 mol of Ca2(PO4)3 mol 30.0 mol 3.0 mol 0.75 None of them mol 25 mol 1.5 mol 15.0

An aerosol spray can with a volume of 250 mL contains 2.30 g of propane gas (C3Hs) as a propellant. You may want to reference (Page) Section 10.4 while completing this problem. Part A If the can is at 22 C, what is the pressure in the can Express the answer in atmospheres to three significant figures. kPa Submit Request Answer Part C The can says

A scuba divers tank contains 0.29 kg of Og compressed into a volume of 2.3 L. Calculate the gas pressure inside the tank at 7C. Express your answer using two significant figures. P kPa Submit Request Answer Part B What volume would this oxygen occupy at 23C and 96 kPa Express your answer ysing two significant figures. vo AZO V

Make a practice report where the steps followed are clearly specified, data obtained, calculations, results and conclusions of the following determinations: (Note: all titrants used were 0.100 M concentration) Determination of M HCl concentration (Iodometry). KI was added in 25% excess for a volume of HCl solution of 50 mL. (say how much KI was

Which one of the following is correct about the chemical potential of twocomponent system, if a small change of composition occurs O a. The change of chemical potential for both components must increase. O b. If the chemical potential of one component increases, the other decreases. O c. The chemical potential of the system will not be affected

11.balance the following equations using the oxidation number method. Assume neutral conditions. a. I 2 + HNO 3 -> HIO 3 + NO 2 + H 2 O b. C 3 H 8 O + CrO 3 + H 2 SO 4 -> Cr 2 (SO 4 ) 3 + C 3 H 6 O + H 2 O c. KCl + MnO 2 + H 2 SO 4 ->K 2 SO 4 + MnSO 4 + Fe 2 (SO 4 ) 3 + H 2 O d. Cu + H 2 SO 4 -> CuSO 4 + H 2 O + SO 2 e. Zn + H 2 SO 4

Given below the half reaction of certain specles with E vs SCE, whlch one of them cant be determined using polarography method or technique In aqueous solutions. O cut 2e cu(Hg) E 0.069 V 3 O Zn 2e Zn(Hg) E 1.000 V Fet e Fe2 E 0.503 V O ca 2e ca(Hg) E 0.603 V E 0.067 V O UO,2 4H 2eu4 2H,O

Calculate the pOH of a 0.0627 M aqueous sodium cyanide (NACN) solution at 25.0 C. Kb for CN is 4.9 x 1010 9.33 O 5.26 O 8.75 O 1.20 O 10.00

?

Define the following tems used in spectroscopy, i) Atomization ii) Nebulization Aerosol iv) Plasma v) Dielectric vi) Interferences vii) Modulation Vii) Radiation buffer ix) Doppler broadening X) Emission

A measurement of ozone levels gives a value of 240 DU. How many ozone molecules would this represent in a column with a cross sectional area of 1 m, assuming P and 0C Include your work.

The reaction A(aq) 2B(aq) 2C(aq) D(aq) has Ko 30. At a particular moment in time, A 0.4 M, B 0.5 M, C 1.1 M, and D 1.4 M. Which of the 3 following statements is true Q K and the reaction is proceeding to the left. Q K and the reaction is proceeding to the right. Q K and the reaction is proceeding to the right. Q K and the reaction is

An aqueous solution is 54 % HClO4 (solute) by mass and has a density of 1.788 g/mL. Determine its Molarity.

Write the IUPAC name of the following compounds.

OH f. Br OH Br Br d. h.

Use Hesss law to determine H o for the reaction

C3H(g) 2 H2(g) C3H(g), given that H(g) 02(8) H20(1) AH 285.8 kJ 3 CO(g) 2 H,0(1) AH 1937 kJ C3H(g) 40(g) 3 CO(8) 4 H2O(1) AH 2219.1 kJ C3HS(g) 50(g)

The 13C NMR spectrum of a CDCI3 solution of an ether Z exhibits signals at 8 71.9 and 59.0 ppm, while in the H NMR spectrum there are two singlets at 6 3.55 and 3.39 ppm (relative integrals 3 2). Which of the following compounds is Z most likely to be a. CH3OCH2CH2CH20CH3 b. CH3OCH2CH20CH3 O c CH3CH20CH2CH3 d. CH3CH20CH20CH2CH3

A solution of HNO, is standardized by reaction with pure sodium carbonate. 2H NaCO, 2 Na HO CO A volume of 23.28 0.05 mL of HNO, solution was required for complete reaction with 0.8463 0.0008 g of Na,CO,, (FM 105.9880.001 gmol). Find the molarity of the HNO, solution and its absolute uncertainty. Note Significant figures are graded for this

A sample of iodine has two isotopes, with relative isotopic masses of 126 and 128. Four m/z values are shown below. Which one will occur in a mass spectrum of iodine, I 2 , from an ion with a double positive charge?

Even though the name, 1,4dimethylbutane, is incorrect, it is possible to draw its structure. Draw the structure of 1,4dimethylbutane below and then select the correct name for this molecule. Draw the structure of 1,4dimethylbutane. edit structure . Select the correct name. hexane 1dimethylpentane 1,4dimethylbutane 4dimethylpentane

Complete the following reactions. ) OH MgBr b) ATP ADP PO, SCOA AcetylCoA Carboxylase ) 1. NANO, 2. , , NH2 d) NH2 1) Mel, K2CO, 2) Ag,0, H20 e) LDA heat

Suppose you are working at McDonald, as a senior financial advisor. In May 2020, when the whole world was locked down, McDonald has been accused of forcing employees to work as usual. The media now says the decision contributed to widespread infections of the virus. Try to defend the legitimacy of McDonalds action.

10 g of a solution, containing one or more of NaOH, NaPO4, NazHPO4, NaH2PO4, HPO4 and HCI substances, is titrated with 1.0 M NaOH using the phenolphthalein indicator and 34.5 mL NaOH is used. Another 10 g mixture was titrated to reach the bromocresol green end point and 20.50 mL NAOH is used. What is the composition of the solution What are the

1. 3.0 grams of limestone was dissolved in acid and converted into CaC204 and MgC04 compounds. The oxalate compounds were dried and weighed. The weight was found to be 1.8286 grams. This mixture was dissolved in sulfuric acid and 32.44 mL of a 0.100 M KMN04 solution was consumed to titrate the oxalates. What are the percentages of MGCO3 and CACO3

Draw the picture of the products of the P450 BM3 catalyzed reaction with NPG as substrate in the presence of oxygen and NADPH.

Pauli Exclusions Principle presents electrons as what c. slash d. caret a. arrows b.asterisks Aufbaus Principle presents electrons as what a.letters and symbols b.letters and numbers c. letters and signs d. letters and letters

At STP, what volume of H2 is produced from 18.75 grams of H3PO4 Chemical equation 3Ca 2H3PO4 Ca3(PO4)2 3H2

At STP, what volume of H2 is produced from 18.75 grams of H3PO4 Chemical equation 3Ca 2H3PO4 Ca3(PO4)2 3H2

What are primary, secondary, tertiary, and quaternary structures for the crystal structure of an inactive akt2 kinase domain?

QIRank the following structures in decreasing order of boiling point and solubility in water.Clearly explain your reasonings. CH,OH CH3 CH2NH2 OH B E Q2Explain the following IR data of the given lactones. v 1735 cm v 1770 cm V 1840 cm

Select the option that best describes a professional Lab book. O A Lab book is only a place to record results. No other notes are permitted, and all space is to be used. A Lab book is a legal document which records methods used, results observed, and requires witness signatures. A Lab book is where calculations are made and graphs are drawn. A Lab

Given the balanced chemical reaction and the tabulated data, calculate the standard enthalpy of reaction (AH) in k. CHC) 3 HCIG) CH(g) 3 Chg) Compounds AH, (kJmal) CHC 134 HCs) 92 CH 75 0465 kJ 0151 k 0 335 O 151 k 301 J

the following question relates to the information you were provided prior to the exam, which included the sequence position of a specific amino acid, and the name of an amino acid that this specific amino acid is mutated to. Additional hint the chain that your mutated residue is located within the structure is indicated in the table below PDB

Your enzyme is inhibited by one of the compounds depicted above. The inhibitor for your specific protein is indicated via the PDB protein code shown. On the basis of the enzymes structure, its substrate and mechanism of action, predict what type of enzyme inhibition (i.e., competitive or non competitive) may occur and justify why you think this is

With the aid of a simple generic diagram, identify and explain how chemical bonding stabilizes a specific secondary structure element that is present in your PDB protein (you can use the software PyMol). You will need to label the participating amino acids and atoms.

the following question relates to the information you were provided prior to the exam, which included the sequence position of a specific amino acid, and the name of an amino acid that this specific amino acid is mutated to. Additional hint the chain that your mutated residue is located within the structure is indicated in the table below PDB

Lectins are proteins that bind carbohydrates and are critical for biological recognition processes in living organisms. Describe what bonds and forces could be involved in lectin and carbohydrate interactions.

The charge of particular functional groups is dependent on the environment they are in. Predict the overall charge on the amino acid valine in pH 2, pH 7.4, and pH 11, and explain why the charges of the functional groups on valine change.

Assuming the product formed from your enzyme has an absorbance at 405 nm, the following data for constructing a standard curve were obtained. The concentration of Product Stock solution 50 mM. Tube Product Product Stok Buffer Absorbance (mM) solution (mL) (405 nm) (mL) 0.21 1032 O a 4) E ENG 15062021 ,The concentration of Product Stock solution 50

Which of the following is true for Michaelis-Menten enzyme kinetics?

Which of the following is true for MichaelisMenten enzyme kinetics The lower the Km, the higher affinity of the substrate to the enzyme The value for Km is independent of temperature Km is calculated after the reaction reaches equilibrium Vmax is unimportant because we measure 1Vmax to find Km Enzyme concentration does not impact Vmax or Km O o o

(ii) Consider the structure of the molecule shown below. Explain how this molecule could cross the plasma membrane and get into cells. CH2OH OH OH OH (iii) If the cell has a higher intracellular concentration of the molecule shown in part (ii) compared to the extracellular concentration, what can occ order for more molecules to continue moving

Which of the following is TRUE about comparable valuation? A. A comparables valuation does not depend on which valuation multiple we use B. P/S is a levered multiple C. Comparables valuation was a good approach for Dulux D. Comparables valuation does not involve forecasting E. Comparables valuation makes consistent assumptions about market

Copper converting is carried out at 1300 C. The final slag is taken from a copper converter when the mole fraction of FeS in matte is about 0.05. Assume that the matte exhibits Raoultian behaviour. The partial pressure of sulfur dioxide in the system is 0.15 atm and the activity of FeO in the slag is 0.4. Given the following data calculate the

Acid-catalyzed dehydration of neopentyl alcohol (CH 3 ) 3 CCH 2 OH, yields 2-methyl-2-butene as the major product. Outline a mechanism showing all steps in its formation.

M. 1. The concentration of Na ion in an aqueous solution of 7.44 M NagPO4 is QUESTION 2 What is the concentration (in M) of a sodium chioride(Naci) solution prepared by dissolving 14.4 g of NacI (58.44 gmol) in enough to drop significant digits.)

Complete the following table.

Does a precipitate form when A and B empirical formula of solution A solution B precipitate are mixed sodium acetate barium bromide yes no cadmium sulfate manganese(II) chloride yes no ammonium sulfide iron(II) chloride yes no

Both ethane and ethene can react with bromine. Choose the FALSE statement. Ethane reacts by free radical substitution. Ethene reacts via addition. C Hydrogen bromide gas is released with ethane. Ethene can only react in the presence of light. A D

Draw starting chemicals that will undergo ozonolysis to produce the products shown. In some cases there may be more than one satisfactory answer. 1. O3 H. 2. Me,s 52. 1. O3 2. Mes 53. 1. O3 H. H. 2. Me,s 54. 1. O3 2. Mes 55.

48. Provide a possible structure for a compound with formula C3Hs, given that it reacts with excess H2Pt to give C3H10 49. Provide a possible structure for a compound with formula CHg, given that it reacts with excess HyPt to give CSH12. 50. Provide a possible structure for a compound with formula CSH10, given that it reacts with excess H2Pt to

What reagent(s) would you use to conduct the following transformations Ph Ph 42. OH CH3 H3C OH Ph Ph 43.

Recognizing whether reaction mechanisms should be cationic, anionic, or radical whether intermediates should be cationic, anionic, or radical and recognizing what could be reasonably involved in the initial reaction step. 44. The transformation shown is common in many biological systems. Which of the following statements is definitely, absolutely

4 C. Draw the alkene that would product the products shown. Make sure to make your drawing clear whether the starting alkene was E or Z. Ph 35. OH Br2, H20 36. Br OH CH3CO3H, H20 37. OH OH Oso, H202 38. H 1. BH3THF H3C H 2. NaOH, H2O2 Ph 39. OH PhCO,H H3C CH,CH3 40.

20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. Ph Ph Ph 1. HBr 2. NaOCH 3 Br Br, HO Br Br, HO Cl Cl PhCO3H PhCO H CH3CO3H, HO CHCO3H, HO OSO4, HO OSO4 HO 1. 03 2. MeS 1. 03 2. MeS,B. Draw the major product for each of the following reactions or reaction sequences. You needn t bother to show side products or minor products. For chiral