Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If you begin with 45.7 mg of this isotope, what mass remains after 193 hours have passed? mg

Q: What role do you think the government should have in GMOs and why?

A: Please find your solution below : GMOs or Genetically Modified Organisms are the animals, plants or…

Q: Some Radioactive Isotopes Useful in Medical Imaging Mode of hotope Decay Half e Uhe in Medcal aging…

A: 1) The isotope given is mercury-197 with the isotopic symbol 19780Hg.

Q: Write a balanced nuclear equation for the following: The nuclide thallium-210 undergoes beta decay…

A:

Q: OH NaOH H3C CH3 H3C CH3 Alkyl halides undergo nucleophilic substitution and elimination reactions.…

A: A question based on introduction to organic chemistry that is to be accomplished.

Q: 3. A moderate test for SO4 is to be expected whenever you have SO3 in an unknown solution even when…

A: We have find out answer.

Q: At what temperatures will the following processes be spontaneous? (Enter NONE if the process is…

A: If ΔH is negative and ΔS is positive, the reaction is spontaneous at all temperatures because change…

Q: CO2 (carbon dioxide), Ne (neon), N2 (nitrogen), SiH4 (silane), CH4 (methane), and H2S (hydrogen…

A: We know density = PM/RT, if the density is greater than air then it will be sink in the air. Here…

Q: Compounds X and Y are both C,H15CI products formed in the radical chlorination of…

A:

Q: ANSWER IN 3-5 SENTENCES EACH. 1.What are the function of the Pancreas. 2. Identify the different…

A: Pancreas has both exocrine function and endocrine function. It's also called heterocrine gland or…

Q: buffer solution was made by adding 2.52 mL of 0.50 M acetic acid and 0.774 g sodium acetate with…

A: Using Henderson Hasselbalch equation we can calculate pH of buffer solution.  pH = pKa + log […

Q: Write the electron configuration for the following elements and ions using spdf notation (without…

A: Electronic configuration of elements and ions

Q: Calculate chloride buffered solutions with the following pH value (This problem requires values in…

A:

Q: After titration, 25 mL of a vinegar solution was found to contain .03 moles of acetic acid. Using a…

A: Volume = 25 ml Moles of acetic acid = 0.03 M

Q: Give the clear handwritten answer and explain

A:

Q: You have 0.600 L of an 0.300 M acetate buffer solution (i.e. [HC₂H₃O₂] + [C₂H₃O₂⁻] = 0.300 M) at pH…

A: Given,  The new pH of the solution when 0.600 L of 0.300 M acetate buffer solution  at pH 5.30 when…

Q: Spectrum D MICRONS NICOLET 20SX FT-IR 21 22 2.5 100 2.7 28 2.9 3 2.6 3.5 4.5 5.5 10 12 13 15 16 17…

A: Isocyanide group shows characteristic strong strong absorption band in IR at 2150 cm-1

Q: Why are indicators useful?

A: Answer: Indicators are the substances used in titration where 2-3 drops of indictors is generally…

Q: (2) Using the values for standard free energies given in Table 2.5, calculate AG298 for each of the…

A: Using the standard gibs free energy change to calculate ∆G°

Q: A fetal scalp blood pH test is performed on an expectant mother. Fetal hypoxia, which causes…

A: Human blood is at a pH of 7.4 normally.

Q: Fill in the nuclide symbol for the missing particle in the following nuclear equation 218 At e+ 85…

A:

Q: SODIUM THIOSULFATE SOLUTION, 0.1 N 1. Dissolve 25 g of sodium thiosulfate pentahydrate…

A:

Q: a) AT STP, 0.280 L of a gas weighs 0.400 g. Calculate the molar mass of the gas. M=mRT 0.400g.0.082…

A: a) Given: Volume of gas = 0.280 L Mass of gas = 0.400 g. And conditions are STP.

Q: QUESTION 11 How much energy, in J. is needed to melt 1.762 grams of silver at 65 87 C?

A:

Q: Draw the organic product of the reaction shown. SOCI, HO heat

A: Carboxylic acids react with Thionyl Chloride (SOCl2) to form acid chlorides. During the reaction the…

Q: (b) What happens when- (i) is fast treated with CH3 H3CCO,H and then the product obtained is treated…

A:

Q: calculate density in pounds per cubic feet of ammonia gas at 100C when comfoned by a pressure of…

A:

Q: Hand writing please.  In the aldol condensation reaction, you mixed 1,3-diphenylacetone with Benzil…

A:

Q: 2. Discuss the effect of temperature to density.

A: The density of a substance is it's mass per unit volume

Q: What measurements or values will be needed to determine the molar mass of the unknown acid? V mass…

A: Answer: This question is based on the titration of acid and base where acid is the unknown and base…

Q: 17.Provide a curved arrow mechanism for the transformation shown below. Be sure to show the…

A: We have find out curved arrow mechanism for the formation of nitrobenzene.

Q: 4. A sample of zinc metal reacts completely with an excess of hydrochloric acid: Zn(s) + 2HCI(aq)…

A: When a gas is collected over water then some water vapors are also present along with the gas In…

Q: If AG for a reaction is -3.8 kcal/mol, and Q is 1.3 x10°, what is the value of Keg for this reaction…

A:

Q: 1st attempt See Periodic Table See Hint The leaves of the rhubarb plant contain high concentrations…

A:

Q: Oxybenzone is a useful component in sunscreens because of its UV light absorbing property. What does…

A: The ending of the common name is -one that implys that it is a carbonyl group, mainly it is a…

Q: A standard galvanic cell is constructed with Br2 | Br" and Mn2+ | Mn half cell compartments…

A: From standard reduction potential table  Br2/Br- = 1.07 V  Mn+2 / Mn = - 1.19 v  Lower reduction…

Q: L00 5) C1,H1,N IR 3000 1000 4D00 Spo 140 120 100 80 60 40 20 13C NMR Impurity Impurity N/A CDCI, 1Η…

A: Step 1 : C10H11N ( DBE = 10 - (11-1/2) + 1= 11-5= 6 = 4+2). Benzene ring + Cyano group. Step 2: 2200…

Q: Which of the following characterizes a beta ray? Choose all that apply. is attracted to the…

A: Answer: There are different types of radiations named as α-ray, β-ray and γ-ray present and they can…

Q: Provide the reagent(s) necessary for each of the following transformations. .CI H. HO

A:

Q: (Q24) What is the pH of a buffer solution that is 0.338 M in ammonia and 0.455 M in ammonium…

A:

Q: Calculate AHus of

A:

Q: The peak widths if the spectra of atomic UV-vis are different from the molecular UV-vis spectra.…

A: UV-Visible spectroscopy is an analytical method that analyses the quantity of discrete wavelengths…

Q: Determine the ionic strength of the solution formed by combining the following two aqueous…

A:

Q: Which of the following substances are in their standard state? a. 02(g) b. Br2(g) c. N(g) d. H2O(s)

A:

Q: 2. A solution has a [H,O*]= 1.00x10“ M. W a. Calculate the pH. U (aq) b. Is the solution acidic or…

A: Given-> [H3O+] = 1.00 × 10-6 M

Q: SPECTRUM E. Identify the compound (here) corresponding proton (with labels selected among H2, H3,…

A:

Q: 1. HBr 2. 1. Hg(OAc)2, H20 2. NaBH4

A:

Q: CH30 ce

A: ->Here CH3O- acts as base hence , give elimination reaction and form alkene as major product.

Q: Consider the following aqueous solution of ammonia, a weak base: Base volume: 150 mL Base…

A:

Q: oroblem 10: What is the mechanism of the following reaction? 名18 methanol heat Br:

A:

Q: a) Predict whether fumarate or maleate will have greater electrophoretic mobility. Cis-smaller than…

A: a) Electrophoretic mobility is given by the expression: μ=q6πηrwhere,q=charge on the…