From Chernobyl, 6e6 Ci of Cs-137 was released in 1986.  Cs-137 has a half-life of 30 years.  The released activity decays to _____ Ci in 2022.

Q: Students were tasked to conduct a recrystallization experiment to test the ability of the three…

A: Filtrate is the solution which gets passed through the filter while precipitate is the solid…

Q: Write the formula of the conjugate acid of the Brønsted-Lowry base, (CH:):NH 4+ 1 3 4 9 O2 口7 (s)…

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Q: 14) How many milliliters of 0.225M HCl would be needed to react exactly with 20.0mL of 0.135M NaOH?…

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Q: Qu Which of the following is an Arrhenius base? A KNO, B H,SO, c CH,0 12 6 D KOH

A: Arrhenius base is Compound which can give Hydroxide ion (OH-) when dissolved in water .

Q: 25.0 ml of 0.50M HA (Ka = 3.0 x 10-7) is titrated with 0.45M NaOH. Calculate the pH at the endpoint.

A: We need to find the pH at the end point for the given titration

Q: What is the daughter nuclide when Rn-222 experiences alpha decay ? Write your answer as a…

A: Alpha decay is the nuclear decay process whereby the parent nucleus emits an alpha particle…

Q: Write the balanced equation for the combustion of Propylene or CH3H6 and Oxygen if propylene is a…

A: Combustion of alkanes gives carbon dioxide gas and water vapors .  Enthalpy of combustion can be…

Q: 7) Calculate the grams (g) of solute in these solution volumes given the molarity. a) How many grams…

A: Mole = weight / molar mass Molarity = mole / volume

Q: 300.0 mL of 0.400 mol/L KOH is added to 300.0 mL of 0.400 mol/L HF. The resulting neutralization…

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Q: solution is prepared disolving 2.00g of an substance in 10.0mL in water at 25°C. The freezing point…

A: Given- Weight of substance =2.00 gram  Volume of water =10.0 mL  T1=25°C T2= -0.350°C  Kf of…

Q: Which of the following is suitable to use when forming grignard reagent

A: Grignard reagent has general formula of R/Ar-MgX , where R is an alkyl group and Ar is an aromatic…

Q: Question 2 of 10 Construct the expression for Kc for the following reaction. 4 HCI(aq) + O:(g) = 2…

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Q: Activity 3. Magnetic Properties Instructions: Using the electronic Configuration, which of the…

A: Concept:  Paramagnetic and diamagnetic: In electronic configuration of elements, Whenever two…

Q: What is the pH of 39.74 mL of a 0.1888 M solution of a weak monobasic base (B:, Kb = 9.56 x 10-6)…

A: pH = 11.13

Q: e number of moles of C and D

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Q: What are some advantages of plastics in our modern society? Plastic is versatile and a huge number…

A: Plastic is bio-nondegradable material which is used in a large scale in modern life . Generally it…

Q: g. HCl + CaCO3→ CaClz + H20 + CO2 h. CO2+ KOH → K2CO3 + H20

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Q: Identify the type of reaction for the following:1. formation of (S)-2-butanol from (S)-2-bromobutane…

A: These are Categorised into Substitution  and Elimination  Reactions .

Q: • Calculate the frequency in Hertz, the energy in Joules, and the energy in electron volts of an…

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

Q: Calculate the zero-point energy for the rotation of the 1H19F molecule.

A: The correct solution of the question is given below

Q: E 3 E 2 E 1

A: In an energy profile diagram,if energy of reactant is greater than energy of product, heat is…

Q: The correct name for the following struceture Ps: CI- a) Cis-1-chloropent-2-ene oxfde b)…

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Q: Calculate the Eell for the cell reaction at 25 °C. Take note, not E°.el- 3 Zn (s) + 2 Cr²+ (aq) 3…

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Q: 26.2 kl How much energy is needed to vaporize 75.0 g of diethyl ether (C,H,O) at its boiling point…

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Q: a) If you want to prepare a galvanic cell with the redox couples the Sr2*/Sr (E0= - 2.89V) and…

A: Given that, the redox couples are Sr2+/Sr (E0 =-2.89 V) and Zn2+/Zn (E0 =-0.76 V). a) We have to…

Q: Choose which of the following has the leastSo.   metallic Pt methane molten brass (alloy of Cu and…

A: entropy is the randomness in the arrangement of the particles. in solids constituent particles are…

Q: Calculate the energy content (in Joules) of a 1.00 g of food product that is placed inside a…

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Q: Balance the following equation and write the sum of the coefficients of the reactants and products…

A: To solve this problem we have to balanced the given chemical equation in basic conditions.

Q: What is the Qsp of a solution mixture Al(OH)3 formed from 10 mL 1.00M C6H5NH2 and 15 mL 0.10M…

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Q: 5) Prove whether solutions of these salts will be acidic, basic, or neutral. (Show your work by…

A: Given :-  a) NH4Br  b) KNO3  c) NaCN  To determine :- nature of given salts i.e.…

Q: nat volume of pure O2 (g) C125

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Q: The following data were obtained for a reaction. What is the activation energy? R-8.314 J/Kmol; T(K)…

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Q: For the reaction A - B + C the following plot gives a straight line, with the indicated slope and y…

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Q: The Ksp of Pbl2 is 8.4 x 10^-9. The molar mass of Pbl2 is 461.03 g/mol. The mass solubility (g/L) of…

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Q: 1. What are the possible / and m, values for n=4?

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Q: Which of the following substances would likely have the highest boiling point? lodine (12) Fluorine…

A: Boiling point is the temperature at which vapour pressure is equal to the atmospheric pressure.

Q: A flashbulb of volume 2.80 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 27.0 °C.…

A: We have to calculate the mass of oxygen gas.

Q: 2. If a 50g sample of water at a temperature of 95°C is added to 89g sample of water at 25°C, what…

A: Given: mass of water

Q: What is the pH at the equivalence point in the titration of 100.0 mL of 0.0500 M HOCl (Ka=3.5×10−8)…

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Q: You have an upset stomach and take an antacid. The behavior of the antacid is best described as…

A: Antacids are medicines that neutralize the acid in the stomach and gives relief to heartburn , upset…

Q: A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction: 3Cu*…

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Q: For a certain chemical reaction, the standard Gibbs free energy of reaction is 83.7 kJ. Calculate…

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Q: Given the nature of electrocyclic reactions, which of the pi MOs shown below is involved in the…

A: During the electrocyclic reaction HOMOis involved in the reaction

Q: An acid solution at an initial concentration of 0.015 M. the pH of the acid solution at equilibrium…

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Q: A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction: 2+ 3Cu…

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Q: The following titration curve is expected from which acid-base pair? Fqpivalence Paint pll-7 Volume…

A: Titrant is the substance ( reagent solution of  known concentration) which is added in titration.…

Q: Determine K for each of the following reactions Determine AGa for each of the following reactions…

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Q: LL ర N R O no correct response 22. Calculate the molar concentration of OH in a water solution that…

A: The ionic product of water  can be used to determine the concentration of OH- in a watwr solution…

Q: b. C. Br

A:

Q: A .075M solution of a CH3NH2 has a pH of 9.25. a) Write the Kp reaction for CH3NH2. b) Calculate its…

A: Given that, the concentration of the methyl amine is C = 0.075 M. The pH of the solution is 9.25. a)…