A sample of curium-243 was prepared. After 1.00 year, the activity of the sample had declined from 3012 disintegrations per second to 2921 disintegrations per second what is the half-life of the decay process?

Q: 8) The ppm concentration of K ions (Atomic mass is 39.04 g/mol) in the solution that result from…

A: 1 ppm = 1 mg in 1 L

Q: Be sure to answer all parts. Determine the percent ionization of the following solutions of formic…

A: According to the question, The given acid is formic acid. Suppose the concentration of formic acid…

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A:

Q: When butanone is mixed with a reducing agent, what is the IUPAC name of the product? A

A: Answer:- This question is answered by using the simple concept of chemical reactions of organic…

Q: Given: 2H+(aq) + 2e– → H2(g); 0.00 V Rb+(aq) + e– → Rb(s); –2.98 V F2(g) + 2e– → 2F–(aq); 2.87 V…

A: 2H+(aq) + 2e– → H2(g);   0.00 VRb+(aq) + e– → Rb(s);.   –2.98 VF2(g) + 2e– → 2F–(aq);    2.87…

Q: 10.30 Provide the reagents necessary for the following synthetic transformations. More than one step…

A: This question is based on reaction of alkane , alkene and alkyl halide. In this question various…

Q: Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) +…

A:

Q: Consider the mechanism. A B + C Step 1: Step 2: C + D E Overall: A+ D→ B+E Determine the rate law…

A: The sum of the exponent term in the rate law for a chemical reaction is known as the order of the…

Q: 1A H2A Li Be 3A 4A 5A 6A 7A He B C N 8A O Hf Ta W Re Os Ir Pt Au Hg Tl F Ne Na Mg 3B 4B 5B 6B 7B Al…

A: There are 18 groups and 7 periods in the modern periodic table.

Q: Question 1: What alkane is formed when each alkene is treated with H2 and a Pd catalyst? a. CH3 C=C…

A:

Q: An analytical chemist is titrating 129.5 mL of a 0.2500M solution of nitrous acid (HNO₂) with a…

A: Well, we will first calculate the millimoles of both acid and base to determine the excess reagent.…

Q: What are the possible sources of error when reacting sodium bicarbonate and hydrochloric acid within…

A: When sodium bicarbonate reacts with the hydrochloric acid, then sodium chloride, carbon dioxide and…

Q: What would need to happen if you wanted to melt NaCl?

A: The Sodium chloride is the salt containing the Sodium ions and chloride ions which are held together…

Q: The volume of a gas is ___________ proportional to its temperature as long as the pressure remains…

A:

Q: 20 Write the overall molecular equation for the reaction of hydroiodic acid (HI) and potassium…

A: Hydroiodide acid represent as HI Pottasium hydroxide KI

Q: 1. Identify reagents that can be used to accomplish each of the following transformations: R OH An…

A: Reagents used in each of reaction are given below

Q: 5 If you try to dissolve 500 g of KCIO4 into 1 kg of water at 80° C, how much of the 500 g will NOT…

A: This question is based on solubility of KClO4 in water at different temperature.

Q: (b) Determine how the reaction rate varies with substrate concentration. Rate increases substrate is…

A: We have to tell how the rate of a reaction varies with the substrate concentration. Introduction:…

Q: What is the relationship between the following pair of molec O Stereoisomers Conformational isomers…

A: Stereoisomers :-  The two isomers which are differ from each other by its orientation of connection…

Q: CHEM 101 1- A gas known to have a formula of NOx was found to effuse at a rate that is 0.834 times…

A: Graham's law:

Q: НО. OH OH

A:

Q: b Calculate the enthalpy change for this reaction from enthalpies of formation. AH (kJ/mol)…

A: Given data:  The enthalpy of formation of CH3CH(OH)CH3(g) is -272.8 kJ/mol  The enthalpy of…

Q: I need the answer for the lowest yield, same question, please?

A:

Q: Which of the substances has polar interactions (dipole–dipole forces) between molecules? CHF3 CCl4…

A:

Q: Data Table and Results (Part B - Determining Solution Concentration) Measurement Volume of Solution…

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Q: How would I convert this answer to nm?

A: Dimensional analysis is used to convert a physical quantity given in one type of unit to some other…

Q: What is the principal product(s) formed when 1 mol of methylmagnesium iodide reacts with 1 mol of…

A: Correct option is I

Q: Rank the following substances in order of increasing boiling point: F2, Ne, He, Cl₂ He < Ne < F₂ <…

A: Boiling point of compounds depend on the bonds and attractive force present in the molecules.

Q: Draw the Lewis structure for SO₂ (with minimized formal charges) and then choose the appropriate…

A: Given -&gt; SO2

Q: takeAssignment/takeCovalent Activity.do?locator-assignment-take [Review Topics] [References] Use the…

A: Because osmolarity= molarity× n And molarity× molecular weight/100  = w/v And% w/ v= w/ v× 100

Q: Write in Kröger-Vink notation the formation of Schottky-type and Frenkel-type defects in: a) Cu2O…

A: Check the defects first

Q: Using the data in the table, calculate the rate constant of this reaction. k = A + B C + D Trial [A]…

A: Rate equation is represented by.... Rate = K [A]x . [B]y

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A: Fibrous protein is insoluble in water whereas globular protein is soluble in water.

Q: 5.3 A 0.1200 g sample of pure iron wire was dissolved in acid, reduced to +2 state and titrated with…

A: 5.3 A 0.1200 g sample of pure iron wire was dissolved in acid and reduced to +2 oxidation state .…

Q: H₂O₂ HCN N₂O LEWIS STRUCTURE XeF₂ LEWIS STRUCTURE BiCls XeF4 BA UP SETS BA UP SETS MOLECULAR…

A: we have to draw the Lewis structures and complete the given table

Q: alxal OH зхобу OH OH OH

A: Alcohols are oxidised to aldehydes and ketone Aldehydes are oxidised to carboxylic acid

Q: sample of an ideal gas has a volume of 3.70 L at 11.40⁢ ∘C and 1.70 atm. What is the volume of the…

A:

Q: The half-lives of different medical radioisotopes are given in the table. If the initial amount of…

A: In radioactive decay unstable nuclei decays into stable nuclei with emissions of some rays in the…

Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A:

Q: For the following processes, calculate the change in internal energy of the system and determine…

A: According to the question, The gas is in an insulated cylinder which means that no heat is gained…

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A:

Q: A 1.500-g sample of gasoline was burned in a bomb calorimeter whose total heat capacity is 13.20…

A: Given that the heat capacity of the bomb calorimeter is 13.20 KJ/ oC. Mass of the sample is 1.500 g…

Q: 1.6 A potassium permanganate solution with a concentration of 0.2834x10-5 exhibits a transmittance…

A: Beer's law states that the absorbance is directly proportional to the concentration of the absorbing…

Q: Explain what scientific principles you used in making this prediction and how this supports your…

A: Highest melting point - CaO  Melting point of the molecules is given below--&gt;  NaCl - 801°C CaO -…

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A: Nuclear magnetic resonance spectroscopy is branch of chemistry in which we deal with shielding and…

Q: The molal boiling point elevation constant K,-1.40 °C-kg-mol for a certain substance X. When 42. g…

A: Given, molal boiling point elevation constant (Kb) = 1.40 °C.kg.mol-1 Mass of urea ((NH2)2CO) = 42.…

Q: In an experiment, 27.5 g of metal was heated to 98.0°C and then quickly transferred to 150.0 g of…

A: we have to determine the specific heat of the metal

Q: By titration, it is found that 19.1 mL of 0.157 M NaOH(aq) is needed to neutralize 25.0 mL of…

A: At neutralisation point : Gram-equivalent of acid = gram equivalent of base i.e. N1×V1 = N2×V2 But,…

Q: The 3rd Nitrogen from the left has 3 sigma bonds and a lone pair. Isn't that sp3?

A: For hybridization we check the electron groups. If there are 4 electron group on N ( 3 Sigma bond…

Q: 11. sodium phosphide 12. diphosphorus pentoxide 13. potassium nitride 14. sodium oxide 15.…

A: -&gt; Ionic compound is formed due to attraction of cation and anion . -&gt; Ionic bond  is formed…

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.