The Cs-131 nuclide has a half- life of 30 years. After 120 years, 5.0 g remain. What is the original mass of the Cs-131 sample in grams?

Q: Which of the following ionic compounds did you find to be paramagnetic? copper(II) oxide iron(III)…

A: we have to select the ionic compounds that are paramagnetic

Q: 1. H₂(g) + O₂(g) → 2H₂O AH = -572 kJ a. How much heat is produced in the production of 100.g of H₂O?…

A: Dear student,  Since you have posted multiple questions, according to the BARTLEBY qna  guidelines..…

Q: Consider the four elements sodium, magnesium, barium and sulfur. Which element has the greatest…

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Q: Is the reaction stereoselective? Does the reaction of bromine with trans-cinnamic acid involve…

A: To predict whether the reaction of trans cinnamic acid is stereoselective in nature or not.

Q: After dissociation, if another atom picks up the lost particle from the water molecule, it is now…

A:

Q: 5. Substitution and Elimination Reactions. (a) Draw the structure of all major organic product(s)…

A: Elimination reactions often compete with substitution reactions. In this reaction, a substrate…

Q: Given the initial rate data for the reaction A + B ---> C, determine the rate expression for the…

A: we have to determine the expression for the rate law

Q: Is the answer that you got for the blue box or the "?"?

A:

Q: 7. What major product would you expect from the following reaction? NO₂ HNO, H₂SO4 A) B) O₂N. NO₂…

A: Nitration of the benzene ring is an electrophilic aromatic substitution reaction and in this…

Q: Br Br 1. NaNH2, A 2. H3O+ Select to Draw

A: This is dehydrohalogenation reaction. NaNH2 is strong base

Q: If you let this battery run for 2 hours at 1.3 amps, what will be the new E for this battery?

A: To find out the EMF of the cell when the battery is run for 2 hours at 1.3 A.

Q: The element zirconium (Zr) crystallizes with a Simple Hexagonal unit cell. The density of a…

A: density (d)  =mass / volume  volume  = 3*sqrt(3)*a^2*C / 2      C = 1.633 a      a = 2r    C =…

Q: Finally, calculate the enthalpy of vaporization from the slope of your fit for the midpoint (or 310…

A: Vaporization is the process of transitioning of the liquid state of a substance into its vapor…

Q: A sample of hydrogen gas is placed in a solid steel chamber (rigid walls) with a volume of 4.25 L.…

A: Given -> Initial volume (V1) = 4.25 L  Initial temperature (T1) = 25.0°C = 25.0 + 273 = 298 K…

Q: 9₁) 9.) A 14,546 a Sample of 101 CaCl 2 was added to 28,192 of Of K₂CO3, and mixed in 9 yield of…

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Q: ANSWER ASAP PLEASE Carbon-14 has a half-life of 5730 years and the radiocarbon activity of wood…

A:

Q: 1. Draw condensed structure formulas for the following compounds. cyclohexene cyclohexane toluene

A: condensed structural formula, every carbon atom is represented individually, and the following…

Q: I2(g) + Cl₂(g)- 2ICI(g) Using the standard thermodynamic data in the tables linked above, calculate…

A: First we need to calculate the standard free energy change for given reaction using the standard…

Q: 1. The following data were recorded for the enzyme-catalyzed reaction S→ P. [S] in M 6.25 x 10-6…

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

Q: ) N₂H4 (1) + 2 H₂O2 (1) Complete the following table: N2 (g) + 4H₂O (1)

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

Q: predict the steric number and molecular geometry of SF4.

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Q: Answer the questions in the table below about the shape of the tetrachloroiodide (IC14) anion. What…

A: The question is based on VSEPR theory we have to determine the shape and bond angle of the given…

Q: a cell is placed in a hypertonic solution, what happens to the cell?

A: Hypertonic, isotonic, and hypotonic are the three types of tonicity that a solution can have in…

Q: IG AMOUNT X What is the change in enthalpy when 1.25 moles of O are reacted with an excess H₂ of…

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Q: A chemist prepares a solution of silver nitrate (AgNO3) by measuring out 482. g of silver nitrate…

A: Molarity is the number of moles present in volume (in litre).

Q: According to the balanced thermochemical equation: CH4 +2 02-CO₂+2 H₂0 AH = -803 kJ, how many grams…

A: When 803 KJ heat are released 44.01 gram of CO2 production.

Q: Which of the following ligands cannot coordinate in an η4 fashion? Group of answer choices…

A:

Q: A galvanic cell is powered by the following redox reaction: 2+ 2NO3(aq) + 8H(aq) + 3 Zn(s) - 2 NO(g)…

A:

Q: Draw correct chemical structural formulas based on the VSEPR model for these compounds with the…

A: Valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular…

Q: isited Draw structural formulas for both resonance structures of the enolate ion obtained by…

A: When a base reacts with a compound, it abstracts the most acidic proton leading to the formation of…

Q: Based on your MO diagram, why does HF form strong hydrogen bonds with other HF molecules? Briefly…

A: Fluorine has a larger electronegativity than oxygen, so the H-F bond is more polar than the H-O…

Q: What is the pH -determining equation for 0.010 M NaCl?

A: Given : NaCl = 0.010M  Tip : For salt pH = 7

Q: Write down the intermediate and circle the product from (a)-(d).

A: In the first step of the reaction, alkene reacts with chlorine to form dichloro alkane.

Q: e. f. 1. BH3, THF 2. NaOH, H₂O2, H₂O Br₂ DCM HBr -40 °C

A: Organic Reactions  Hydroboration Oxidation Reaction: convert alkene to alcohol Bromination of…

Q: Born-Oppenheimer approximation  State the Born-Oppenheimer Approximation both in English and in…

A: Born–Oppenheimer (BO) approximation is the best-known mathematical approximation in molecular…

Q: a. b. C. d. e. sider a substance that follows first order kinetics has a half-life, t1/2, of 88.90…

A:

Q: 1. If the HVL of lead for 60Co is 0.49 inches, what thickness of lead would be required to reduce…

A: 1) If the HVL of lead for 60Co is 0.49 inches Initial radiation, Io = 600 mrem/h Final radiation, I…

Q: Given that there are four transitions in hydrogen (410 nm, 434 nm, 486 nm and 656 nm), please match…

A: According to the question, The four sets of wavelength is given as 410, 434 nm, 486 nm, and 656 nm…

Q: how to draw the mechanism of this?

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Q: mol A chemist must prepare 325. mL of 1.00 M aqueous iron(III) bromide (FeBry) working solution.…

A: Formula, M1V1 = M2V2

Q: 5. The molecular mass of caffeine is 194.2 g/mole. A sample was analyzed, and it was found to be…

A: Molecular formula of caffeine is C4H10N4O2....

Q: Provide the missing reagents for the following reactions. H₂C CH3 5. H₂c= 7. CH₂ ? H₂C ? LE CH₂ CH₂…

A: Since you have asked multiple questions we will solve the first three question for you if you want…

Q: Calculate the boiling point elevation and freezing point depression of a 3.0 m solution of sucrose…

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Q: Question 13 of 41 Using the equations - 2 Fe (s) + 3 Cl₂ (g) → 2 FeCl (s) AH = -800.0 kJ/mol Si(s) +…

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Q: What is the geometric structure for the following: SF4…

A: We can calculate shape and geometry by using VSEPR theory. According to the VSEPR theory, lone pairs…

Q: Draw the major product of this reaction. Ignore inorganic byproducts. HBr (1 equiv) H₂O2

A: In presence of peroxide antimorkovnikov addition of HBr takes place and Br- added to less…

Q: One microgram of your LDH catalyzed NAD* reaction at a rate of 0.50 µmole/min under optimum…

A: LDH is a lactate dehydrogenase that catalyzes L-lactate to pyruvate and releases NADH. LDH activity…

Q: A galvanic cell is powered by the following redox reaction: MnO4(aq) + 2 H₂O(1) + 3 Cu* (aq) MnO₂…

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Q: Hydrogen peroxide decays into water and oxygen  H2O2(aq)  --->  H2O(l)  +  1/2 O2(g) If we begin…

A: The rate constant for the decomposition of hydrogen peroxide to hydrogen gas and oxygen gas is given…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.