State and explain why 99m Tc is used in preference to 1231 for investigating cerebral blood flow in a brain scan. Include in your answer radiological and biological properties.

Q: QUESTION 44 Which of the following compounds has the lowest boiling point? O 1-chloro butane O…

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Q: At what temperature in Kelvin will a reaction have AG = 0, when AH=-24.2 kJ/mol and AS = -55.5…

A: ∆G = 0  ; ∆H = -24.2 KJ/mol  ∆S = -55.5 J/k.mol  Temperature in kelvin = ?

Q: 5. At 25°C, the K, for a certain monoprotic base B is 2.5x10. What will be the K, value for the…

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Q: Which reaction results to a decrease in the entropy of the system? O 4 NH3 (g) + 5 02 (2) → 4 NO (g)…

A: The entropy is the measure of degree of randomness in a molecule.

Q: Given the data in the table below and AH°rxn for the reaction SO2C12 (g) + 2H2O (1) → H2SO4 (1) +…

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Q: Carbonyl compounds as nucleophiles Maximum allowed tries per question: Unlimited No extensions will…

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Q: the enthalpy for the decomposition of liquid water into gaseous hydrogen and oxygen

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Q: lentify the expected major product of the following electrocyclicreaction. + En + En + En II IV V

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Q: The workup of preparation of 1-bromobutane involves pouring the distillate into a separatory funnel…

A: A separating funnel is used to separate the two immiscible liquids, that do kot mix with each other.…

Q: Answer the following questions. 17.64a1 Would you expect the above compound to be aromatic? Yes O No

A: Given compound is :

Q: Carbocations undergo 1,2-methyl shift or 1,2-hydride shift to produce a more stable intermediate.…

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Q: 5.00 g of banana reacts with excess oxygen in a bomb calorimeter with a heat capacity of 10.3 kJ/°C.…

A: Given,  Mass of banana = 5.00 g  Heat capacity of bomb calorimeter = 10.3 KJ/0C Initial temperature…

Q: Dr. Stanton.MCRaray Apri 24, 20 K* O Br b) H,0 Na осн, THE d) но

A: The explanation is as follows:

Q: Provide the structure of the reactants necessary to prepare the following compound using the Wittig…

A: The structure of the reactant needed to prepare the given product using wittig reaction = ?

Q: Which process could not be an electrolytic reaction? a. 2Fe(s) + 302(g)→ Fe2O3(s) O b. 2H20(1) →…

A: Here we are required to find the reaction which is not an example of electrolytic reaction.

Q: 4. Amount of HCl in grams in preparing 25% 2 liters of solution

A: In this question, we want to determine the amount of HCl in grams unit in 25% of 2L solution.  You…

Q: For the given reaction: ? HO ? + NaOH + NaCI + H2O Major substitution product Major elimination…

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Q: A process cannot be spontaneous if_ O it is exothermic, and there is an increase in disorder O it is…

A: ∆G= ∆H -T∆S for a spontaneous reaction free energy should be always negative.

Q: In a lab, you diluted a sample of bleach to 1/10 concentration in a 250 vol. flask. Then…

A: Given: Volume of diluted bleach (V1) = 250 mL molarity of sodium thiosulfate (M1) = 0.1215 M diluted…

Q: A clean iron nail is dipped into a solution of silver nitrate. Using your knowledge of the…

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Q: Identify the monomers of the following copolymers. F F F F H F а. C- F CF3 H F F CF3 H F H2 H2 H2…

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Q: numerical value of the concentration of a solution

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Q: In any oxidation-reduction reaction, the total number of electrons gained is a. equal to the total…

A: Oxidation and reduction reaction takes place side by side. One of the reactants gets oxidized…

Q: (I) (II) (III) (IV)

A: Alkene stability Is depends on alpha hydrogen atoms.

Q: Calculate the pH of the above buffer after 10.00 mL of 1.000 M NaOH (0.01000 mol OH1) was added to…

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Q: What do you call the transfer of one or more electrons between reactants? O a. Decomposition…

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Q: For the compound shown, the most probable site(s) of electrophilic aromatic substitution is/are: OH…

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Q: 6. For the reaction 2 HI H2) + I2) Keg = 0.016 at 500°C (a) If 1.0 mole of HI is placed in a 2.0-/…

A: Given, Reaction : 2 HI(g) ⇌H2(g) +I2(g)     Keq=0.016

Q: Which are NOT true for carbenes? Select the correct response(s): The carbon is sp3 hybridized. The…

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Q: AH = 2220. kJ AS = 6016. K 3c0,(g) + 4H,0(1) - C,H,(g) + 50,(g) AG = kJ Which is spontaneous? O this…

A: The Gibbs free energy change for the reaction is calculated as: ∆G=∆H-T∆S ......(1)

Q: Do research on one of the following topics and construct a 3 paragraph informative summary on the…

A: Hii there, As there are multiple question posted. we are answering first question. If you need…

Q: (iv) Re-draw the amino acid below in a Fischer projection. H2N но, Me

A: The Wedge dash is converted  to fischer in such a way that most oxidized  group at  top and most…

Q: A buffer was created using ascorbic acid and sodium ascorbate. What is the pH of the buffered…

A: Given,H2C6H6O6 = 5.5 × 10-5 MHC6H6O6-1 = 3.5 × 10-4 MKa = 8.00 × 10-5Required,…

Q: 1. Calculate the percent composition of sucrose ( C12H22011) %O = 176.00 g/mol x 100 = 51.41% 342.34…

A: Known: Atomic mass of O = 16.00 amu Atomic mass of H = 1.01 amu Atomic mass of C = 12.01 amu

Q: Which are NOT true for carbenes? Select the correct response(s): It is used to form cyclopropanes…

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Q: True or False: Elements exists in various oxidation states in the second and third transition series…

A: #1: Transition elements are present in between s-block and p-block elements in the periodic table.…

Q: what will he major mdult of the following reackione 9gmine inngamat.byproduete I.03 2 zn, HOAC

A: It is one of the crucial reaction of alkene where carbonyls are major outcomes.

Q: 19. What is the molarity of a commercial phosphoric acid solution, H3PO4 (MW= 98.0 g/mol) that is…

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Q: For the reaction 2 NO) N,Ote) (a) At a given temperature, 1 mole of NO, is placed in a 10-1…

A: 2NO2(g) <----> N2O4(g) I   1 mol                 0 C  -2x                    +x E 1-2x…

Q: Show retro-synthetic analysis leading from the target molecule to the precursor molecule showing all…

A: Given:- We have to transform the synthesis of given following below:

Q: What is the pathlength in centimeters when the molar absorptivity for a given absorbing species is…

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Q: Aluminum is produced commercially by the electrolysis of Al, O3 in the presence of a molten salt. If…

A: The amount of Al produced can be calculated as follows

Q: 1. The formula for the conjugate base of H,P04 is 2. The formula for the conjugate acid of HC,04 is

A: Acid are the substance that loses a proton to form conjugate base. Base are the substance that gains…

Q: Question What is the normality of o.0824M H3PO4? Type only the numerical value in three significant…

A: The normality can be calculated as follows

Q: Write balanced half-reactions for the following redox reaction: 6 Cl,(g)+C,H,OH(1)+3 H,0(1) - 12 CI…

A: Reduction :-  The process of addition of hydrogen or loss of electrons or decrease in oxidation…

Q: I need help finding the functional groups and the wavelegth  for the coumpound   and to draw the is…

A: The compound p-bromoacetanilide is given below : If we expand the above structure with all the…

Q: 0.0592 V E cell -log(K) Calculate the equilibrium constant for the following reaction at 25°C:…

A: E°cell = (0.0592 V / n ) × log(K) 2Ag(s) + Fe2+(aq) <---> 2Ag+(aq) + Fe(s)  K = ?

Q: Which of the following is a statement of the first law of thermodynamics? O Ek = 1/2 mv2 O A…

A: Which of the given statement follows the first law of thermodynamics ?

Q: How many unique signals would be expected in each?? 13 C | DtPT १0 DEPT 135 *)に) - 3. NH2

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Q: 1. Considering the trends in the periodic table for atomic radii, ionization energy, and electron…

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