Chemistry Questions and Answers June 04, 2020

Draw the structure of (R)4deuterio2hexyne. Propose a suit able retroSN2 precursor of this compound.

1. The F, from a cross of ABAB x abab is testcrossed, resulting in the following phenotypic ratios AB 308 190 292 210 What is the frequency of recombination between genes a and b Ab ab aB 2. Use the following twopoint recombination data to map the genes, and show the order and distances between adjacent genes. Gene B C D E A 50 15 38 8 B 50 13 50

Which of the following statements is incorrect for an object with uniform circular motion? A) f=. 2ar B) f = 2n C) T 4mr m4nr V D) w = v.r E) Fcent. ar T2 Which of the following physical size-unit matching is incorrect? A) Force: kg. m/s? B) Energy: kg. m /s? C) Momentum: kg. m/s D) Torque: kg. m/s? E) Work: kg. m? /s

The vander Waals equation is (p)(Vb) RT, where P is the pressure, V the molar volume, and T is the temperature of the given sample of the gas. R is called molar gas constant, a and b are called vander Waall constants. The dimensional formula for abRT is (a) ML 5T (b) ML 3 T (c) ML 1 T2 (d) ML 6 TO

A solution of hydrogen peroxide is 23.6% H 2 O 2 by mass and has a density of 1.11 g/cm 3 . The molarity of the solution is: A) 7.23 M B) 0.262 M C) 7.70 M D) 8.03 M E) none of these

Which of the following processes has a AS 0 A) 2H, () O, () 2H,0 (g) B) 2NO2 g) Ba (aq) 2F (aq) 2HgO (s) OB

Consider the following reaction HCI (aq) NaOH (aq) H20 (1) NaCI (aq) When 100 mL each of 1.0 molL hydrochloric acid and sodium hydroxide are mixed in a coffee cup calorimeter, the temperature of the solution rises from 21.0 C to 29.5 C. You may have to refer to notes from previous units to complete this question. Please show all working and

Write TB beside each statement that is too broad to be developed in an essay. Write OK beside the statement in each pair that is a clear, limited point. a. The attacks of 9/11 dramatized the heroism we have come to expect from our police and firefighters. b. Americans responded well during the attacks of 9/11.

In services pricing, Competitionbased price increases due to one of the following reasons. Oa. Switching costs are high Ob. High nonpricerelated costs of using alternatives Oc. Time and location specificity reduces choice. Od. Increasing surplus capacity in the industry e. Personal relationships matter

Explain with example the ways efficiency of a business can be calculated and described from financial management point of view. (6) Q 4 Explain with example how operating decisions, financing decisions and investing decisions can be taken using the knowledge of financial management (9)

A completely mixed activated sludge plant is designed to treat 10,000 m3/d of industrial wastewater. The wastewater has a BOD5 of 1200 mg/L. Pilot plant data indicates that a reactor volume of 6090 m3 with an MLSS concentration of 5000 mg/L should produce 83% BOD5 removal. The value for Y is determined to be 0.7 kg/kg and the value of kd is found

System Boundary Aeration tank Secondary clarifier Primary effluent Effluent Q, Xo, So Q QR Qe X, S X, S V, X, S Sludge QR. Xu S Sludge underflow return Qw Xp S Sludge waste Qw Xy S

Circle the letter of the sentence in each pair that would work well as the thesis statement for a college paper from five to ten pages long. Remember that a thesis should be a central idea that requires supporting evidence; it should be of adequate scope for a five-to-ten-page paper; and it should be sharply focused. 1. a. American women who

For each of the following signals, determine whether it is periodic, and if it is, find the fundamental period (a) x(t) cos (2nt) (b) x(t) sin(2t) (c) x(t) e cos(2mt) (d) xn (1) (e) xn (1) (f) xn cos(2n) (g) xn cos(2rn) 3D 3D Problem 1.1 Find the even and odd components of each of the following signals (a) x(t) cos(t) sin(t) sin(t)

The heats of hydrogenation of cycloheptene and 1,3,5- cycloheptatriene are 110 kJ/mol and 305 kJ/mol, respectively. In both cases cycloheptane is the product. What is the resonance energy of 1,3,5- cycloheptatriene? How does it compare to the resonance energy of benzene

A reaction 2A? P has a second-order rate law with &-4.30 x10 M's'. Calculate the time required for the concentration of A to change from 0.210 M to 0.01 M.

1 Construct a complete set of force polygon for the mechanism is static equilibrium shown in the figure, and if Q120 lb, determine P and Fax. Use force scale as 1 In100 lb. (DC 3.85 tn, DO 2.95tn, am 29. B 50) 12 P 4 3 (I. B B 2 C 0

Explain the operation of contribution in insurance using at least 2 examples.

Calculate the pH for a 4.3 10 8 M HCl solution with an ionic strength of m = 0.1. g H+ = 0.83, g OH = 0.76 and g Cl = 0.755.

Titanium is a metal used in jet engines. Its specific heat is 0.523 Jg C.If 5.88 g of titanium absorb 4.78 J, what is the change in temperature

Draw a stepwise mechanism for the conversion of hex5en1ol to the cyclic ether A. hex5en1ol OH HSO4 A

Name each of the following polygons. If an adjective applies, use it also. b. . d. . g. h. j.

Calculate the chemical shift in parts per million () for a proton that has resonance 128 Hz downfield from TMS on a spectrometer that operates at 60 MHz.

Write the formula and name of the compound formed from the following ionic interactions; (a) The 2+ ion and the 1-ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element, (b) The 2+ ion and the 2? ion are both isoelectronic with the Period 3 noble gas. (c) The 2+ ion is the smallest with a filled d subshell; the anion

Calculate the value of the heat of vaporization of ice at -1C . The values of the pressure of water vapor are 3.88 mm Hg at -2C and 4.58 mm Hg at 0C.

Q10) Consider the reaction of MnOz with HCI below. MnO2 4HCI MnCl, Cl, 2H2O (a) If 0.86 mole of MnOz and 48.2 g of HCI react, which reagent will be used up first (b) How many grams of Cl2 will be produced (Hint Refer to the periodic table to caleculate the molar masses of MnO2, HCI, and Cl2)

Draw an organotin coupling partner that will react with bromobenzene under Stille conditions (as shown above) to give the following compound

______ are similar to molecular formulas but show how atoms are bonded together.

The temperature of 2.50 moles of an ideal gas increases from 13.5 degrees Celsius to 55.1 degrees as the gas is compressed adiabatically. Calculate q, w, ?U, and ?H for this process assuming that Cvm = 3R/2 (the vi and m are subscripts for this). q= 0 since its adiabatic. w=?U = 1.30x10 ^3J, ?H=2.16 x 10 ^ 3 J.

Draw the product (including stereochemistry) formed from each pair of reactants in a thermal 4 2 cycloaddition reaction. CH,CH2 a. CN b. CN

Elaidic acid is a major trans fatty acid in margarine and fried foods. Oleic acid (cis-9) and elaidic acid (trans-9) are both mono unsaturated fatty acids with 18 carbons. Briefly explain the observation that oleic acid has a melting point of about 13C, while elaidic acids melting point is about 45C.

Crude oil flowing through a pipeline has a density of 0.9019 g/cm 3 . If 4,000,000 liters per day pass through the pipeline, calculate the mass flow rate of the oil.

Calculate the pH of a solution obtained by mixing 10 mL of the strong acid HCl solution ( pH = 3.0 ) with the same volume of the strong base KOH solution ( pH = 12.0 )

An undesired contaminant is present in a fluid. The contaminant is observed to de grade spontaneously, so a suitable treatment technique is simply to detain the fluid for a certain period before use. To quantify degradation kinetics, a series of experiments was conducted in a well stirred batch reactor. Each experimental run was conducted for a

Make 1.00 L of 1.0 M buffer pH 6.2. How much of each component do you need to use? You have NaHmalonate and 10.0 M NaOH. The pka of malonate is 5.69 and the MW is 126.1 g/mol. (NaHmalonate: ..........g, NaOH: ......... mL, H2O: ........mL). Use the Henderson-Hasselbalch equation, n OH- = n A- , and to first find n HA use the equation n total = n

Write charge balance and mass balance equations for the following solutions a). 0.1M NaCl b). 0.1 M HF c). 0.1 M HCl d). 0.1 M NaH2PO4

Show how you would accomplish the following conversions. (a) cis-hex-3-ene to meso-hexane-3,4-diol (b) cis-hex-3-ene to (d,l)-hexane-3,4-diol (c) trans-hex-3-ene to meso-hexane-3,4-diol (d) trans-hex-3-ene to (d,l)-hexane-3,4-diol

Compound A has the formula C 8 H 8 . It reacts rapidly with acidic KMnO 4 but reacts with only 1 equivalent of H 2 over a palladium catalyst. On hydrogenation under conditions that reduce aromatic rings, A reacts with 4 equivalents of H 2 , and hydrocarbon B, C 8 H 16 , is produced. The reaction of A with KMnO 4 gives CO 2 and a carboxylic acid C,

Calculate the heat combustion of methanol at constant volume and constant pressure for a temperature of 25 degrees C.

Ions of calcium, Ca2+, are ____________________ with argon gas. Covalent bonds typically form between ____________________ atoms. A _____________________ structure shows the arrangement of electrons and bonds in a molecule or polyatomic ion. The shape of a water molecule is ____________________ due to the repulsion of the 2 lone electron pairs on

Aspirin or acetyl salicylic acid is synthesized by reacting salicylic acid with acetic anhydride: (a) How much salicylic acid is required to produce 0.400 g of aspirin (about the content in a tablet), assuming acetic anhydride is present in excess? (b) Calculate the amount of salicylic acid needed if only 74.9 percent of salicylic acid is

C,H,O, C,H,O, C,H,O, CH,0, salicylic acid acetic anhydride aspirin acetic acid

3. We consider a polluted lake, estimated by a rectangular shape of length 12 and constant crosssectional area A, as illustrated in Figure 12.4 of the textbook. Under the following assumptions (i)(vi) (i) The volume V is constant. (ii) An unidirectional flow of fresh water is entering the lake and flowing to its exit at a constant rate F ms. (iii)

Figure 1 illustrates processes related to control of transcription and translation in a cell. Gene X XXXXX Gene A ON XDX 5 m Gene B ON XIIX mRNA 3 Transcription Factor Gene C ON XIIX 13001 Gene D OFF XIX XIX Gene E Protein A Protein B Protein C Protein Figure 1. Model of a relationship between a transcription factor and selected genes E,Which of

Lactose digestion in E. coli begins with its hydrolysis by the enzyme galactosidase. The gene encoding galactosidase, lacZ, is part of a coordinately regulated operon containing other genes required for lactose utilization. Which of the following figures correctly depicts the interactions at the lac operon when lactose is NOT being utilized? (The

RNA polymerase Repressor protein Lactose,a. b. Promoter C. Promoter d. Promoter Promoter lacz Structural Genes Operator lacZ Operator Operator lacy Operator lacz lacY lacA lacA Structural Genes lacA lacy Structural Genes lacz lack lack Structural Genes,a. b. Promoter C. Promoter d. Promoter Promoter lacz Structural Genes Operator Operator lacy

Which would be expected to have a higher melting point, RbBr or SrO?

The molecular formula of aspartame, an artificial sweetener is C14H18N2O5. Calculate the number of moles of aspartame present in 1.00 mg. 1). Determine the number of molecules present in 1.00 mg of aspartame? 2). Determine the number of carbon atoms in a 35.0 ml of 0.055 M C6H12O6 solution.

How many kilojoules are absorbed when 23.09 mol of C6H6() are formed? 6C(s) + 3H2(g) ( C6H6() H = 49.0 kJ

Predict the MAJOR product for the following reactions. (3 pts each) Brz, hv Brz, hv Brz, hv Brz, hv Provide the missing reagents for the following reactions. (HintThere may be more than 1 step) (4pts each) .

The copper concentration in a sludge is 75 mg/kg on wet basis, the sludge has 25% moisture. Its concentration on dry basis is _____ mg/kg.

The volume of a sphere is 4/3r3, where has the value of "pi" - 3.1415926535897932. Write a function called print_volume (r) that takes an argument for the radius of the sphere, and prints the volume of the sphere. Call your print_volume function three times with different values for radius. Include all of the following in your Learning Journal:

1. ABOD A) B) Find the sampling error u5, x2.5, n 100 7.5 2.5 C) 0.25 2.5 D)

The weak acid corresponding to the salt benzylpenicillin sodium, molecular weight 356.38, has a pKa of 2.76, and the drug is dissolved in isotonic sodium chloride solution (0.9 g NaCl per 100 mL) to make a 3% w/v solution of the antibiotic. (a) What is the pH of this solution, disregarding activity coefficients? (b) What is the result using ionic

The drug is a weak acid and has a molecular weight of 356 and a pK of 2.76. The drug is dissolved in isotonic NaC1 solution (0.9 g NaC1 per 100 mL) to make a 3% w/v solution. What is the pH of this solution (disregarding activity)? What the pH of this solution using ionic activity coefficients? (recall the Debye-Huckel equation).

Balance the chemical equation given below, and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 8.00 g of oxygen at 25C The density of nitrogen monoxide at 25C is 1.23 gL. NH3(8) . O2(g) NO(g) . H2O(1)

a. Carbon monoxide and nitrogen dioxide react to form carbon dioxide and nitric oxide. A series of experiments were performed to gain understanding of the kinetics of the reaction. CO] (M) [NO2] (M) initial rate (M/s) 5.1 x 10^-4 0.35 x 10^-4 3.4 x 10^-8 5.1 x 10^-4 0.70 x 10^-4 6.8 x 10^-8 5.1 x 10^-4 0.18 x 10^-4 1.7 x 10^-8 1.0x 10^-3 0.35 x

The three-month futures price for the British pound is $1.3160/. You expect the spot price three months from today to be $1.2690/. The British pound futures contract size is 62,500. If you are a speculator would you buy the futures contracts or short (sell) them? Explain. How much profit would you make if you trade 62 contracts and your

The goal of the recrystallization procedure is to obtain purified material with a maximized recovery. For each of the items listed, explain why this goal would be adversely affected. a. In the solution step, an unnecessarily large volume of solvent is used. b. The crystals obtained after filtration are not washed with fresh cold solvent before

The thermal decomposition of an organic nitrile produced the following data: Determine the order of the reaction and the rate constant. (Note: this notation means the time is 2 x 10 3 sec, for example)

(10 s) nitrile (mol L) 2.00 4.00 6.00 8.00 10.00 12.00 0 0.32 0.25 1.10 0.86 0.67 0.52 0.41

?

If 4.0 g of acetanilide are mixed with 1.5 mL of 16M nitric acid and excess sulfuric acid, then calculate the theoretical yield of p nitroacetanilide in grams. Assuming a 40 yield, how many grams of acetanilide and how many mL of 16 M nitric acid are necessary in order to obtain 4.3 g p nitroacetanilide,MM mass (g) vol (ml) moles mp (C)

Calculate the vapor pressure of water over a solution made by dissolving 225 g of glucose in 575 g of water at 35C. (At 35 C, P = 42.2 mmHg.)?rn

Choose the best option for the immediate electrophile precursor to allylcyclopentane.

Culi electrophile

There are two possible twelve month investments, A and B. Their cash flows are described in the table below. Draw a fully labeled cash flow diagram for each showing all amounts individually (see Figure 3.5 as an example). Remember to show the units of time in your diagram. Note Diagrams are not typically drawn to scale, but rather loosely

Name this functional group

The compound below contains alan Cick her to enter answor functional group. H H HCC0CCH H H H H

Figure 5 shows a circuit comprising a resistor, a capacitor and a switch. Write an expression for the Voltage Vc as a function of time (t20), if at time t0 the switch is moved from the upper position (as shown in the diagram) to the lower. You must show your working to achieve full marks for this. 5 marks R 10V 2V C Vc Figure 5 2.2 When an audio

Chemical and mechanical engineers often need to know the vapour pressure of water for specific temperatures. Physical chemistry suggests that the vapour pressure should follow an exponential relationship to the inverse of the temperature. Specifically, let p, be the vapour pressure and T be the temperature, the ClausiusClapeyron equation states

Introduction (an edited and adjusted version of your topic approval) including a justification for your research question(s). A detailed research methodology addressing the qualitative-quantitative debate, hypothesis (if appropriate), additional secondary data, proposed primary data sample size and sampling approach, questionnaire design factors

A calendaryear taxpayer acquired four new machines in 2019 on the dates shown below. Section 179 is not elected, but regular MACRS is used to depreciate the machines. The machines have a recovery period of 7 years. The taxpayer elects out of taking bonus depreciation. February 1 April 1 October 1 December 1 50,000 70,000 60,000 80,000 00 a.

What will be the normality of a solution obtained by mixing 200ml of pure water to 100ml of 0.2N HCl solution A B 0.4N D 0.5N C 1.05N 0.0667N

Which statement about the temperature dependence of the rate constant, K, is true for most chemical reactions? a. k increases or decreases with temperature, depending on whether the reaction is endothermic or exothermic. b. k increases with temperature, because the activation energy is usually positive. c. k decreases with temperature, because a

1. Write a BASH shell script that acts as a DOS command interpreter (the user enters the DOS command and the script executes the corresponding Linux command). The script should loop continuously until the user enters the QUIT command Prior to accepting a command, display a prompt containing your first name and the greater than symbol () Example

Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the canvas and connecting them with bonds. Add charges where needed. Electron flow arrows should start on the electron(s) of an atom or a bond and should end on an atom, bond, or location where a new bond should be created.

Part A OCH3 HCI H2O Draw all missing reactants andor products in the appropriate boxes by placing atoms on the canvas and connecting them with bonds. Add charges where needed. Electron flow arrows should start on the electron(s) of an atom or a bond and should end on an atom, bond, or location where a new bond should be created.

Create a diagram that depicts the following scenario where Springfield Power Plants network has been breached by an attacker. or other software may be used to create the diagram: An attacker sends a spear phishing message with the subject Free Donuts in Cafeteria at Noon: Details in Attachment containing a malicious Microsoft Word attachment to

a.Describe the unifying framework of the universal measure of Assets value and rate. b. describe how this framework can be applied of tye assests.

Concentrated sulfuric acid (18.3 M) has a density of 1.84 g/mL. What is the mass % of H 2 SO 4 in the solution?

A steel ball with a specific gravity of 7.86 g cm -3 and a diameter of 0.2 cm falls through a thick liquid along 10 cm for 25 s. The density of the liquid is 1.5 g cm-3. What is the radius of the tube when the viscosity of the liquid is 3.46 Pa s.(1 Pa = 1 Nm -2 = 1 kg m -1 s -2 ; g = 9.8 m s -2 ).

Propose a mechanistic cycle for the formation of the first hydrocyanation product from butadiene with the precursor catalyst [Ni(PP)2] (PP = bidentate phosphite ligand).Which two products will be formed?

When VGS = 0.5 VGS(off) . gm. is -------------- the maximum value. Select one: a. one-fourth b. three-fourths c. equal to d. one-half

The reaction, A B C, is known to be zero order in A with a rate constant of 6.10 x 104 Ms at 25.0 C. An experiment was run at 25.0 C where (Alo 9.80 M. What is the reaction rate after 180. seconds 5.98 x 103 Ms O 6.10 x 104 Ms 9.69 Ms 0.110 Ms 0.0586 Ms

The sex attractant of the housefly has the formula C23H46. When treated with warm KMnO4, this pheromone gives two products: CH3(CH2)12COOH and CH3(CH2)7COOH. Suggest a structure for this sex attractant. [Hint: Calculate the degrees of unsaturation in this compound.] rn

5. A thin rod of length ( and uniform charge per unit length A lies along the x axis as shown in Figure P19.22. (a) Show that the electric field at P, a distance y from the rod along its perpendicular bisector, has nox component and is given by E 2ked sin Ooly. (b) Using your result to part (a), show that the field of a rod of infinite length is

What would be expected to happen to each of the following variables during a recession? Unemployment would be expected to increase stay the same decrease . Durable goods production, such as automobiles, would be expected to increase stay the same decrease . The inflation rate would be expected to increase stay the same decrease .

During a direct shear box test on specimens of a compacted sand the following results were recorded. Determine the peak and residual angles of friction. Normal load (N) 110 216 324 432 Ultimate shear load (N) 85 170 253 340 Residual shear load (N) 66 131 195 261

Critically analyse and explain the applications of Business analytics different tools and techniques in the new economy. Some samples from proper resources should be provided.

Glucose (C6H12O6) is the main source of energy in the metabolism. When 0,3212g og glucose is combusted/burnt in a bomb calorimeter at 298,15 K (T surrounding) the change in temperature was 7,793 K. The heat capacity of the calorimeter is 641 J/K. Calculate cHm and cUm for the combustion.

Calculate the freezing point and boiling point of an antifreeze solution that is 50.0 g ethylene glycol (HOCH2CH2OH) in 50.0 g water. Ethylene glycol is a nonelectrolyte.

In a mixture of N2 and H2 in the ratio of 1:3 at 64 atmospheric pressure and 300oC, the percentage of ammonia under equilibrium is 33.33 by volume. Calculate the equilibrium constant of the reaction using the equation, N2(g)+3H2(g)2NH3(g)

Write an ionic equation for the reaction of acetic acid with sodium bromide, and specify whether the equilibrium favors starting materials or products. CH, COOH (aq) CH,COO (aq)H (ag) The equilibrium favors starting materials What is the value of K

In limonene, the major volatile compound in orange peel oil, how many carbon atoms are in the sp3 hybridization state. a). 3 b). 4 c). 5 d). 6 e). 7

Kavi, Ravi, Kumar and Guru were partners in a firm sharing profits in the ratio of 3 221. On. 122017, Guru retired and the new profit sharing ratio decided between Kavi, Ravi and Kumar was 3 1 1. On Gurus retirement the goodwill of the firm was valued at Rs.3, 60, 000. Showing your working notes clearly, pass necessary journal entry in the books

Write the complete decay reaction and calculate the energy generated, in MeV, for the following radioisotopes: (a) Po211, an alpha emitter: (b) Zr95, a beta emitter: (c) P30, a positron emitter: (d) Cu64, in K-capture: (e) Kr87, a neutron emitter: The necessary atomic masses in amu are Si30=29.97376, P30=29.97863, Ni64=63.9280, Cu64=63.9288,

Jackie Wong was an enthusiastic employee when she began working in the accounting department at Steelfab Corp. In particular, she prided herself in discovering better ways of handling invoice and requisition flows. The company had plenty of bottlenecks in the flow of electronic documents throughout the organization and Jackie had made several

Be Careful Group has organized a social distancing gathering on September 16, 2020. The cost estimates for the event are listed below. Expected attendees: 40 Food: $1,200 Decorations: $100 Labor: $600 Hall Rental: $200 The actual costs are listed below. Actual attendees: 50 Food: $1,450 Decorations: $105 Labor: $800 Hall Rental: $200 (1) Prepare a

Design a simple circuit to open and close a double acting hydraulic cylinder. Show how you would control two double acting hydraulic cylinders to move in opposite directions - i.e. when cylinder A extends, B retracts and vice versa. Both cylinders should move as close to the same speed as possible.

Prepare 50 ml of 10X Tris-EDTA (TE; which is 100mM Tris, 10 mM EDTA) from the stock solutions prepared in A and B. (A) Prepared 250 ml of 0.5 M EDTA (292.24 g/mol). (B) Prepared 500 ml of 1 M of Tris buffer (121.14 g/mol).

A gas obeys the following equation of state: P(v-b) = RT where the constant b was found to be 0.2 m 3 /kmol. Over the temperature range 300-400 K the heat capacity may be taken to be constant at 40 kJ/kmol K. Calculate h and s for the following chance of state: State 1: P = 10 Bar T = 300 K State 2: P = 20 Bar T = 400 K Show that: - c p is

Many of you may have noticed signs popping up during the pandemic about a coin shortage. That was a real situation, brought on by so much business being pushed online, even for industries like restaurants. There has been a growing movement across the globe toward shifting away from coin and paper currency, relying instead on electronic payments.

Assume that hardee has no loaded backhaul to return the vehicle and driver to pittsburgh how would you account for the empty backhaul costs associated with this move would you include those in the head haul move how would this impact your pricing strategy

Need Help with C++ Project. NEED HELP CREATING AND IMPLEMENTING CLASSES Develop C++ classes that could be used to create a room simulator. Create two classes: one to represent a seat and the other to represent a room. These classes can be used to create a room simulator, which will not be created as part of this assignment. Requirements: provided