If 93.75% of a radioactive isotope of technetium-99 remains after 24 hours, what is the half-life?

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A: Step 1The question ask to deaw the structural condensed formula of N,N-dimethyl…

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Q: 7. Calculate the following for a 1.50 M Ca(OH)2 solution. a. The concentration of hydroxide, [OH-]…

A: Step 1: GivenCalcium hydroxide, [Ca(OH)2​] is a strong base, dissociating into two hydroxide ions…

Q: Question 16: For the reaction A + B --> C + D, the enthalpy change is -20.0 kJ/mol and the entropy…

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A: Final Product The final compound, EtS-CH2-CH2-OH, contains:An ethylthio (EtS) group derived from…

Q: What mass in grams of gold is produced when 6.50 AA of current are passed through a gold solution…

A: Given: Amount of current = 6.50 A = 6.50 Coulomb/s                   ( Ampere (A) = coulomb/s)Time…

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Q: 3. Write a complete mechanism for the aldol condensation shown below. кон Η EtOH, H₂O, A где

A: Step 1:The given butanal react with base to form carbanion, which is undergoes resonance form…

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Q: 3. Identify the reactants then draw and identify the organic product of each reaction. a. + LIAIH4…

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Q: SN1 E1 Br HOH ☐ SN2 E2 NaSH DMSO SN1 E1 SN2 E2 SN1 E1 HC1 OH heat SN2 E2

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Q: Q#24. Curved arrows are used to illustrate the flow of electrons. Use the reaction conditions…

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Q: etermine the systematic (IUPAC) name for each of the molecules represented by the Newman projections…

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Q: What is the products of Alpha cleavage and dehydration of 0

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Q: 1. Propose reasonable synthetic pathways for the conversion of 1-butanol into the various products.…

A: 1-butanol can be converted to 1-bromobutane by using hydrobromic acid (HBr). This is a nucleophilic…

Q: Draw the structures of two alkenes that would react to form the haloalkane below upon addition of…

A: Step 1:Unsymmetrical alkenes reacts with HBr, the Br- adds to the less substituted double bond…

Q: 4. Propose a synthesis of the target molecules from the respective starting materials. a) b) LUCH C…

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A: Step 1:Ka - acid dissociation constant It's express the strength of the acid More the acidic, higher…

Q: Show the full mechanism of how the molecule ((1E, 3E, 5E)-1-methoxyhepta-1,3,5-triene) is built…

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Q: 1. For each of the following statements, indicate whether they are true of false. ⚫ the terms…

A: This statement is true. In the context of alcohols, primary, secondary, and tertiary refer to the…

Q: Figure H H C=C CH₂ H :0: C H 1 of

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Q: Americium-241 is used in some smoke detectors. It is an alpha emitter with a  half-life of 432…

A: The problem is asking us to find out how long it will take for 38.0% of an Americium-241 (Am-241)…

Q: Use ΔHf0  listed below to calculate ΔH0rxn for  the reaction…

A: Step 1: Given                                C + 4HNO3 → CO2 + 4NO2 + 2H2O    ΔHf0  (kJ/mol)…

Q: The following reaction is first order in NO2.  Solve the differential rate equation to create the…

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Q: Question 17: For a particular chemical reaction delta H is -6.0 kJ and delta S is +24 J/K. Under…

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A: Question 4:For a reaction, ∆H˚rxn = Σnp∆H˚f(products) - Σnr∆H˚f(reactants)Where,np= stochiometric…

Q: For the reaction shown below, circle all potential products. Keep in mind that, for each case, you…

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Q: 2. Draw the mechanism for the following reaction: Br2 hv

A: Step 1: InitiationThe Br2​ molecule absorbs UV light and undergoes homolytic cleavage to form two…

Q: 3. Provide the missing compounds or reagents. 1. H,NNH КОН 4 EN MN. 1. HBUCK = 8 хно Panely…

A: Missing reagents or compounds:Friedel-Crafts AlkylationThiophene + Isobutyl chloride + AlCl3 →…

Q: Consider this nucleophilic substitution reaction. Br + :C=N:

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Q: I'm confused can you help me for steps data analysis in AFM

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Q: 4) a. What is your prediction for the magnetic moment of V(CO)4? (Hint: start with a correct d…

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A: The structure of 1,3-dibromobenzene consists of:A benzene ring with two bromine substituents at…

Q: Using the chromatogram below calculate the following parameters: a. Capacity factors for both peaks…

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A: (c)Name: 1-Ethyl-2-methylcyclohexeneThe cyclohexene ring has a double bond between carbons 1 and…

Q: Draw the molecular ion (M*) for this molecule formed in the mass spectrometer. H. H -e-

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Q: Draw the structure of the major product formed when the following alkyl halide undergoes an E1…

A: Approach to solving the question: E1 elimination reaction:As we know, E1 elimination reaction is a…

Q: A first order reaction is 46.0% complete at the end of 59.0 minutes. What is the value of k? What is…

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Q: calculate the kovats retention indices for solutes 1 and 2 from the data shown and assume tm=0.50…

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Q: The average afternoon air temperature is 27°C in Chicago in July. If the vapor pressure of water is…

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Q: 9.22 Propose a structure for an alcohol with molecular formula C5H12O that has the 1H NMR spectrum…

A: 1. Degree of Unsaturation:Using the formula for degrees of…

Q: NaCN 15. What is the major organic product obtaine H excess HI heat LS

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A: Identify the parent chain:The parent chain should contain the highest possible number of carbon…