The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of cesium-129 to fall to 27.5 percent of its original value?

Q: Re-order each list in the table below, if necessary, so that the atoms or ions in it are listed in…

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Q: The titration of0.5529 g of KHP required 25.75 mL of an NaOH solution to reach the equivalence…

A: Weight of KHP = 0.5529 gm Volume of NaOH = 25.75 ml

Q: Propose a synthetic route to carry out the following transformation. Please explain НО CH3 H H

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Q: In the chemical reaction between benzyl chloride and ethanolic silver nitrate solution, a…

A: Benzyl chloride does. In order to form a precipitate, the chloride ion needs to detached. This…

Q: 2. A 0.72 g sample of polyvinyl chloride (PVC) is dissolved in 250.0 mL of a suitable solvent at…

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Q: A 250 ml. sample of gas at 1.00 atm and 20°C has the temperature changed to 40°C and the volume…

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Q: Determine the amount of heat, in kJ, required to heat 34 g of liquid Ca at 851C to 926 C. Melting…

A: We have to predict the amount of total heat.

Q: After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40 and…

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Q: Do the following structures represent the same molecule, isomers, or neither? [ Select] Why? [Select…

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Q: For the molecule below, predict the expected splitting (multiplicity) for the indicated proton. •…

A: Spin of N is 1 So 2*1*1+1=3 So spilliting of indicated proton is triplet

Q: The correct Empirical formula for this compound is Select an answer and submit. For keyboard…

A: Mass of Mg + Mass of O = Mass of product Also, No of moles = Mass / Molar mass

Q: Determine whether or not the following molecules are chiral: A) CH3CH2CHClCH3 B) CH3CCl2CH3 C)…

A: A molecule with atleast one chiral center and does not have any type of symmetry(plane of…

Q: Calculate the solubility (in g/L) of CaSO, (s) in 0.400 M Na, SO, (aq) at 25°C. The Ksp of CaSO, is…

A: we need to calculate the solubility of calcium sulfate in sodium sulfate solution

Q: What is the rate of the reaction if the concentrations of A and C are doubled and the concentration…

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Q: For each system listed in the first column of the table below, decide (if possible) whether the…

A: Sign of ∆S ( entropy change )  can be determined by initial entropy and final entropy.  We also have…

Q: A 25.00 mL solution of 0.08530 M Nal is titrated with 0.05150 M AGNO,. Calculate pAg* following the…

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Q: Using the following formula, calculate the entropy of a system that has 42 microstates. S = k In W;…

A: Given: No.of microstates = W = 42 k = 1.38 * 10-23 J/K Calculate : Entropy of system = S = ?

Q: Name the following carboxylic acid or ester. CH3-CH2-C-0–CH2-CH3

A: In order to write iupac name we have to follow some rule 1) first select longest carbon chain…

Q: Estimate the number of 'H NMR signals that each molecule would display, entering your answer as a…

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Q: a) HO 2. Br 1. NaH b) OH HBr c) HO- H2SO4 NaCN CI CI 1)

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Q: Inat is asked in every qu 1. Show the electron configuration of the following elements below and…

A: Lewis dot structure: The valence electrons is presented on atom . The electrons present in the…

Q: Assuming it occurred in an acidic solution, what is the correctly balanced equation for H,02+ Sn,+ →…

A: Fyvbb

Q: Consider this amino acid shown here at pH 7.0 (the isoelectric point for this amino acid is 9.7).…

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Q: 2. Determine the pH if I add 0.5 moles of NHẠC1 (s) to a 5 L solution of water. (Note: the Ka of…

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Q: A solution contains 0.24 M Pb2+ and 0.43 M A13+. Calculate the pH range that would allow Al(OH)3 to…

A: Given :  Concentration of Pb+2 = 0.24 M  Concentration of Al+3 = 0.43 M  Ksp of Pb(OH)2 = 1.43 x…

Q: 4.00 L of carbon dioxide gas were collected at 20.0°C and 1.50 atm, at what Celsius temperature…

A: Let us discuss the question. For an ideal gas-     PV = nRT ,  we can use this formula to solve this…

Q: Calculate the standard reaction potential and use the half-reaction method to determine the moles of…

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Q: Consider the reaction  H2(g)  +  Br2(g)   2 HBr(g). If the partial pressures in an equilibrium…

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Q: Solve it asap

A: Here 1.75 g of Mg was mixed 125 ml of 0.2 M HCl solution at 25°C and 1.06 atm pressure.We have to…

Q: Part A The following data show the rate constant of a reaction measured at several different…

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Q: 5, At which pair of temperature and pressure values would the solubility of hydrogen in water be…

A: Gases are soluble under the condition of low temperature and high pressure.

Q: mass

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Q: Below is a simplified version of the Theorell-Chance mechanism for the metabolism of ethanol (A) to…

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Q: Predict the products of the following single replacement reaction and predict whether it will be…

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Q: Use average bond energies (table in the hint) to compare the combustion energies of ethane,…

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Q: half-life

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

Q: A solution contains 0.0120 M Pb² + (aq) and 0.0120 M Sr2 + (aq). If you add SO-(aq), what will be…

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Q: Sample A 1. Molarity of Standard HCI 0.1 mol 2. Volume of Standard HCl used 25 ml 3. Initial Volume…

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Q: A gas occupies a volume of 8.0 L at a certain temperature and pressure. What is the final volume of…

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Q: the Lewis structure

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

Q: Above what Fe2 + concentration will Fe(OH), precipitate from a buffer solution that has a pH of…

A: Given:: pH=9.04 Ksp of Fe(OH)2 = 4.87×10-17 [Fe2+] = ?

Q: 1- Calculate +he equilibrium constant at 25 Č for the reaction 2H + Dzcg) = Haegs+ 2D" From the…

A: 2H+ + D2(g) --> H2(g) + 2D+ E°D+/D2= -3.4 mV = -3.4 × 10-3 V (1 mV = 10-3V) T= 25°C =25 +273 =…

Q: Q2/ Calculate effective atomic number of  a-Fe(CP)2 b-[Ag(NH₂)]

A: a. Effective atomic number - Atomic number of Fe is 26 that is Fe has 26 electrons and 1 CP ligand…

Q: 15. How many hybrid orbitals do we use to describe each molecule? Enter in integer form! -BrCN

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Q: the bond-line structure/formula for 3,3-diethylcyclodecyne.

A: In bond line structure,  corners and end of the line is represented as carbon.

Q: Consider the reaction 2Al(s)+3H2SO4(aq)--> Al2(SO4)3(aq)+3H2(g) (molar mass) of aluminum sulfate is…

A: Given :-  2Al(s) + 3H2SO4(aq) ---> Al2(SO4)3(aq) + 3H2(g)   Molarity of H2SO4 solution = 0.200 M…

Q: Estimate the number of 'H NMR signals that the molecule would display, entering your answer to a…

A: Proton NMR shows different types of protons present in a given organic compound.  All those protons…

Q: What is the pH of a solution that is 0.15M ethylamine, C2H5NH2,and 0.10M C2H5NH3Br (ethyl ammonium…

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Q: Compute the standard entropy change for the following reaction: Ag(s) + 1/2CI2(g) → AgCI(s) i J/K

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Q: Convert 2.75 eV to nm. Give your answer to one decimal place. Answer:

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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.