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(a)
Interpretation:
The reason for radon-222 to not simply decay as fast as it is produced without reaching to the maximum concentration needs to be explained.
Concept introduction:
All the radioactive decay reactions follow first order kinetics. The expression for rate law can be represented as follows:
Here,
(b)
Interpretation:
An expression for change in number of atoms of radon-222 related to number of atoms of radium-226 and decay constant of parent and daughter needs to be determined.
Concept introduction:
All the radioactive decay reactions follow first order kinetics. The expression for rate law can be represented as follows:
Here,
(c)
Interpretation:
The time taken for the amount of radon-222 to reach a maximum value needs to be determined.
Concept introduction:
All the radioactive decay reactions follow first order kinetics. The expression for rate law can be represented as follows:
Here,
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Chapter 25 Solutions
EP GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- Acid Catalyzed Aromatization of Carvone: 1. Starting with the ketone, below, draw a mechanism for the reaction to give the phenol as shown. H2SO4 HO- H₂O 2. Why do we use CDCl instead of CHCl, for acquiring our NMR spectra? 3. Why does it not matter which enantiomer of carvone is used for this reaction? What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?arrow_forwardAssign this H NMRarrow_forwardPlease complete these blanks need that asaparrow_forward
- Nitration of Methyl Benzoate: 1. Predict the major product for the reaction below AND provide a mechanism. Include ALL resonance structures for the intermediate. C(CH3)3 NO₂* ? 2. Assuming the stoichiometry is 1:1 for the reaction above, what volume of concentrated nitric acid would be required to mononitrate 0.50 grams of the compound above? What product(s) might you expect if you nitrated phenol instead of methyl benzoate? Explain your reasoning. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?arrow_forwardSodium Borohydride Reduction (continued on the next page): 1. Draw the product of each of the reactions below and give the formula mass to the nearest whole number. ? (1) NaBH (2) acid (1) NaBD4 (2) acid ? 2. In mass spectra, alcohols typically break as shown in equation 8 in chapter 11 (refer to your lab manual). The larger group is generally lost and this gives rise to the base peak in the mass spectrum. For the products of each of the reactions in question # 1, draw the ion corresponding to the base peak for that product and give its mass to charge ratio (m/z). 3. Given the reaction below, calculate how many mg of 1-phenyl-1-butanol that can be produced using 31 mg NaBH4 and an excess of butyrophenone. 4. + NaBH4 OH (after workup with dilute HCI) What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?arrow_forwardAspirin from Wintergreen: 1. In isolating the salicylic acid, why is it important to press out as much of the water as possible? Write a step-by-step mechanism for the esterification of salicylic acid with acetic anhydride catalyzed by concentrated H₂SO4. 3. Calculate the exact monoisotopic mass of aspirin showing your work. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?arrow_forward
- Synthesis of Ibuprofen-Part 1: 1. What characteristic absorption band changes would you expect in the IR spectrum on going from p-isobutylacetophenone to 1-(4-isobutylphenyl)-ethanol and then to 1-(4-isobutylphenyl)-1-choroethane as you did in the experiment today? Give approximate wavenumbers associated with each functional group change. Given that the mechanism of the chlorination reaction today involves formation of a benzylic carbocation, explain why the following rearranged product is not formed. محرم محمد 3. Why do we use dilute HCl for the first step of the reaction today and concentrated HCI for the second step? What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?arrow_forwardAssign only the C NMRarrow_forwardDraw out the SALCs of wach orbital in a AlCl3 molecule.arrow_forward
- Which of the following is 3-ethyl-2-methylpentane? хarrow_forwardCan you please help me with this problem and explain it step by step? I'm so confused about itarrow_forward2. Identify the reagents you would need to achieve the following. You may need to consider using a protecting group. HO 1. 2. 3. 4. 5. OH Br HOarrow_forward
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