A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 24.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/16 of the initial amount. time for amount of radionuclide to decrease to 1/16 of initial amount radionuclide initial sample radioactivity symbol half-life 64 A Ga 3.0 minutes v (choose or D minutes 31 1 (highest) 33 I days 3 P. 25.0 days 15 4 (lowest) 103 Ru O days 39.0 days (choose one) e 44 68 Ga minutes 68.0 minutes (choose one) 0 D 31 ? B.

Q: identify the chiral centers of the compound and pls reconfigure and draw the compound with the…

A:

Q: 19. For the helix in double-stranded B-form DNA, the majority of the stability of the DNA can be…

A: Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that folded around each…

Q: 7. The heat capacity of N; as a function of temperature is shown below: Cp.m 28.883 -0.157T +0.808T…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: (c) Predict the product(s) for the following reaction with supporting mechanism. i) SeO, Aq. dioxane…

A: This ragents are oxidizing agents.Oxidation takes place with DDQ and SeO2.

Q: The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be…

A: The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be…

Q: The egg phospholipids act as emulsifying agent in the formulation. Depending on the pH, they may be…

A: The DLVO theory is named after Derjaguin, Landau, Verwey, and Overbeek. DLVO theory is a theory of…

Q: At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-3…

A:

Q: What is the absolute configuration of the compound below? A picture containing text, clock…

A:

Q: Which of the following compounds is not an amino acid?

A:

Q: What is the standard molar entropy change of the following reaction? 8 NH3(g) + 10 O2(g) → 8 NO(g)…

A: Entropy is a measure of the randomness of the system. The entropy change in a chemical reaction can…

Q: 10. What is the absolute configuration of the compound below? Br CH, B. 3R. 4R, SR C 35, 45, SR D.…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: Он NO2 CH2CH3 SO3H (а) (b) (с) (d) (е)

A: ->If Electron donating group attached to the benzene ring then it increases the electron density…

Q: Which of the following is FALSE? a. In the extraction of caffeine, caffeine was dissolved in the…

A: To determine which of the following statement is FALSE  a. In the extraction of caffeine, caffeine…

Q: Which pOH value below corresponds to a solution with the highest concentration of hydronium (H+)…

A: Given,  a). pOH = 3.0  b). pOH = 10  c). pOH = 7.0  d). pOH = 6.4  e). pOH = 11.2  What is the pOH…

Q: Design a detailed procedure (with estimated masses and volumes) that allows you to determine the…

A: We need to determine the detailed procedure for estimating the enthalpy of dissolution of a salt.

Q: 1. (Heat) The combustion of 0.0222 g of isooctane vapor, C3H18(g), at constant pressure raises the…

A:

Q: Compound A: Step 1: Step 2: Step 3: chlorination (EAS) F-C acylation nitration not necessary…

A: The sequence is as follows:

Q: 3.68 Calculate the energy to heat two cubes (silver and copper), from 15 °C to 25 °C. Refer t each…

A: Volume of both silver and copper cube = 10.0 cm3 = 10.0 mL  Initial temperature , T1 = 15°C  Final…

Q: ČH2CH3

A:

Q: Which one of the following cannot exhibit linkage isomerism? O K2[Ni(NC)2CI2] O Cu(NO2)2(NH3)2 O…

A: Linkage isomerism: Isomer complex in which the ligand co ordinates to the metal. For eg. Nitrite

Q: McQuarrie Rock Gallogly presented by Macmillan Learning A researcher studying the nutritional value…

A:

Q: Draw the structure(s) of the major organic product(s) of the following reaction. 1. NaOCH3 / CH3OH…

A: Here we are required to predict the product of the reaction.

Q: 3. Through the water displacement method, 400 cm? of oxygen was generated and collected. The…

A: It is an application of combined gas law Here we are required to find the volume of oxygen gas if it…

Q: Reaction Rates Reaction rates are measured in units of which is = to

A:

Q: 9. (Calorimetry - Determination of enthalpy) A coffee-cup calorimeter having a heat capacity of 472…

A: Answer: This question is based on energy conservation where energy released during the reaction will…

Q: Calculate AGO at 25°C, given the values of AHO = - 844 kJ/mol and -165 J/mol-K.wt a. AS° b. At what…

A: According to the second law of thermodynamics, the spontaneous nature of the reaction is determined…

Q: 8. (Calorimetry - Determination of specific heat) A 5.1-gram piece of gold jewelry is removed from…

A: Given that -  Mass of gold jewellery = 5.1 g  Mass of water = 16.9 g  Initial temperature of gold =…

Q: 1. Boiling point of the liquid is the temperature at which the liquid starts to change into a steam.…

A: We have to tell whether the given statements are true or false.

Q: What is the major organic product of the following reaction?

A:

Q: 13. (Entropy) For each of the following processes, tell whether the entropy of the universe…

A: We have to tell about the entropy change of the universe for the given process.     We know that…

Q: How many moles are in 4.5 moles of CCl4

A: Number of moles of CCl4 = 4.5 mole

Q: NaOH, H20 a) Heat (provide starting materials for Robinson annulation) NaOH, H2O b)

A: Robinson Annulation is a useful reaction for the formation of six-membered rings in polycyclic…

Q: CH3 2 CH-с-он 1. Ibuprofen, a pain reliever: or buprofen 3. Acetone, made by the body when it breaks…

A:

Q: Which of the following mixtures can be titrated with separate endpoints? weak acids with Ka…

A: Answer: In the titration end point is the point at which titration gets completed and indicator…

Q: Law) Determine the heat of formation AH°; (in kJ/m (H2O2) at 25°C from the following thermochemical

A:

Q: 1.3) Predict the intermediate(s) and product(s) for the following hydrations. Include…

A: Given reactions are :  (a).  (b).      Give the structures of intermediates and major products of…

Q: 3. (Stoichiometry + LR/ER) The thermite reaction, used for welding iron, is the reaction of Fe;O4…

A: Given that -  Following reaction -  8Al(s) + 3Fe3O4(s) ----> 4Al2O3(s) + 9Fe(s) , ∆H°reaction =…

Q: CI

A: The following steps are required- First of all find the longest carbon chain containing functional…

Q: Why is it best that a radioactive medical tracer emit high energy gamma rays? so they can be…

A:

Q: Will the following amino acid migrate in an electric field? Explain. + H3N- CH-C- CH-CH3 CH2 CH3

A: Given structure is :  Will the following amino acid migrate in the electric field = ?

Q: What is the pOH of an aqueous solution at 25.0 °C that contains 2.50 x 10-4 M hydronium ion?

A:

Q: If pure polonium-210 (k = 5.02 x 10-3 day-1) were used in a crime, based on radioactive…

A:

Q: 7.→Hydrogenolysis of dº alkyl complexes is usually rapid, e.g.: CP2ZFRCI + H2 CP2ZFHCI + R-H Suggest…

A:

Q: Mass Spectrum 100- 1H NMR Spectrum 6H M (74) = 100% M+1 (75) = 4.52 M+2 (76) = 0.28 doublet 80- 2H…

A:

Q: (a) Arrange the following compounds according to their reactivity towards electrophile. Justify your…

A: We must know that more aromatic a compound is, more stable it will be and thus less reactive. A…

Q: An aqueous solution of a particular compound has pH = 7.46. The compound is O a weak base O a weak…

A: If the solution has the pH is less than 7, then the solution is acidic. If the solution pH = 7 then…

Q: Identify the isoprene units in the following terpene

A: Identify the isoprene units in the following terpene---

Q: 4) Draw all constitutianal isomers formed bey mono ch lorinatom. Cla ho

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Use the Nernst equation to calculate the cell potentials (in V) of the following cells at 298.15 K.…

A:

Q: Using crystal field theory, draw an electron box energy level diagram for the valence d orbitals on…

A: