What is the half-life of a sample that decays from 200 grams to 12.5 grams in eight hours?

Q: V. @Given the following reaction shall the detailed 1 mechanism fer me Conversion of A to B •OCN3 y…

A: Ring strain is type of instability  that exists when  bonds in a molecule  from an angle that are…

Q: oxidizing and reducing agents. Cri3 + H₂O2 → CrO4²- + 104

A: Given that, a redox reaction is CrI3 + H2O2 → CrO42- + IO4-. We have to balance the above redox…

Q: Concentration conversions a) 1 g/L to ppm b) 20 ppm to mg/L c) 10,000 ppm to mg/L d) 0.8 mg/L to ppm

A: ♦ Parts per million or ppm is used to express the concentration of a substance . It is defined as…

Q: aluminum oxide cation to anion ratio

A: Cations It carry a positive charge.  They are postively charged ions.  Anions It carry a negative…

Q: Use the given ¹H NMR spectrum to answer the following question. PPM The signals near 1.2 ppm and 3.4…

A: 1HNMR spectroscopy is used to determine the arrangement of Hydrogen atoms in the molecule.

Q: Given the following cell notation below, solve for the expected initial voltage at 25 Celsius.…

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Q: What is the final volume of the solution prepared when one dissolves 27.8 g of potassium nitrate…

A: Molarity is defined as number of mole of solute divide by volume of solution in liter

Q: A new element is discovered. The new element is named Tucsonium and has the chemical symbol Tu. It…

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Q: Which of the following statements is false? 1) Metabolic pathways are a series of chemical reactions…

A: 1) Metabolic pathways are a series of reaction found in biochemical reactions . It can be linear…

Q: Calculate the cell potential at 25°C for the reaction Fe(s)| Fe^3+ (aq,0.0952 M)|| C12(g,7.62 atm)…

A: Given -> T = 25°C  Fe(s)/Fe3+(aq,0.0952M)//Cl2(g,7.62atm)/Cl-(aq,0.0577M)/pt(s) E°cell = 1.396 V…

Q: WRITE the COMPLETE INNER SPHERE AND OUTER SPHERE MECHANISMS/CHEMICAL EQUATIONS FOR THE OXIDATION of…

A: The concept used in this question is taken from co ordination chemistry.  We have to give two…

Q: What is the volume of 6.09 g of NO gas  at 23 oC and 1.8 atm?

A: Ideal gas equation: The temperature, pressure, volume, and mole of the gas are related by the ideal…

Q: At 500 K, the equilibrium constant for this reaction: X2(g) + 2Y2(g) =3Z2(g) is Kc = 0.222. At the…

A: Since,Equilibrium constant or Kc is the ratio of the equilibrium concentrations of product over…

Q: when 100.0 mL of a 2.00 M solution of KOH(aq) is added to 100.0 mL of a 2.00 M solution of Mg(NO3)2…

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Q: Javi wanted to use a Styrofoam ball calorimeter to determine the enthalpy of dissolution when NH4Cl…

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Q: Choose the statement below which best describes electrolytes. a) Electrolytes are compounds which…

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Q: A 20 mL solution of HCl with pH 1.45 is diluted to 75 mL. Calculate the pH of the diluted solution

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Q: How much heat is required to convert 42.0 g of ethanol at 20 ∘C to the vapor phase at 78 ∘C?

A: Given , mass of ethanol = 42.0 g initial temperature of ethanol , Ti= 20°C Final temperature of…

Q: 10 g 1 kg Perform the following calculation and round to the correct number of significant digits: A…

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Q: Rank the following in order of increasing first ionization energy; Be, B, C, N, O. Explain your…

A: Ionisation energy is the minimum amount of energy requires to remove an electron from it's valance…

Q: Is CH3F or CH3CH2OH more soluable in water.

A: Between CH3F or CH3CH2OH, which is more soluable in water.

Q: A 1.00-mL reaction mixture (pH = 3.00) contains 6.39mM H2O2, 55 M H2O, 0.220mM O2, and 1.00µM…

A: Given: pH =3.00 Concentration of H2O2 = 6.39 mM Concentration of H2O =55 M Concentration of O2 =…

Q: Joules (J) are a measure of energy. Chemists often measure energy in calories (cal). If 1 cal =…

A: To convert the given energy in cal, we need to use the conversion factor given for J to cal.

Q: Avogadro's number is the number of particles in one mole (6.022 x1023 particles = 1 mol).  How many…

A: 1 mol = 6.022 × 1023 particle

Q: An aqueous solution with a high concentration of hydronium ion H3O* is a result of: A salt reacting…

A: The information given is An aqueous solution with a high concentration of hydronium ion, H3O+ is a…

Q: an isolable/ stable nemiacetal A stranger carboxylic acid than propandic and A chival Refore in the…

A: Hemiacetal is not stable because of the presence of two -OH groups in one position and leaving of…

Q: In Kinetics, the Arrhenius equation is given as k=A e(-Ea)RT) What happens to the rate constant, k,…

A: Answer- 2nd option- k decreases, Ea is unchanged.  Decreases the temperature of a reaction generally…

Q: Findthe noble-gas electron configuration for Ir^3+

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Q: Four main-group elements a, b, c and d are highlighted in the outline of the Periodic Table below:…

A: Atomic radius is the distance from nucleus of the atom to the outer shell. In general, atomic radius…

Q: The half-life of Iodine-131 is 8.0 days. 100 μg of Iodine is given to a patient to treat…

A: Half life of first order kinetics is inversely proportional to rate constant

Q: An electric current of 13.10 A transports 23.0 C of charge. Calculate the time this took. Be sure…

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Q: Are any of the following true at the equivalance point? The analyte is present in excess, the…

A: A Titration is a volumetric method to determine the concentration of unknown solution.  In Titration…

Q: The following thermochemical equation is for the reaction of Fe(s) with HCl(aq) to form FeCl2 (s)…

A: A thermochemical reaction is given as, Fe + 2HCl -----> FeCl2 + H2 Where, ∆H = -7.40 kJ Since the…

Q: What is the pH of a 2.00 L solution containing 0.4 mol of NH3 and 0.827 mol of NH4CI? Kb(NH3) = 1.8…

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Q: The correct name for Fe₂O3 is:

A: Using the nomenclature of inorganic compounds, correct name for Fe2O3 can be found out.

Q: The Ksp of Ag2CO3 (MM = 275.81 g/mol) at 25°C is 8.1 x 10-12 a. Calculate the molar solubility of…

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Q: he molecule NaOCH₂CH3 would be expected to have how many hydrogen atoms?

A: We have been given a molecule.NaOCH2CH3.and we have been asked number of hydrogen atoms in expected…

Q: Which of the following statements is NOT true about the peptide named glycylserylphenylalanine? O…

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Q: 25. Of the following transitions in the Bohr hydrogen atom, the results in the emission of the…

A: This is a simple problem of Bohr problem where we have to find out the highest energy photon.

Q: A buffer solution is 0.339 M in H3PO4 and 0.382 M in KH₂PO4. If Kal for H3PO4 is 7.5 x 10-3, what is…

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Q: 12 Find the radius of a nucleus of C and 6 (a) (b) 12 C 6 238 92 U fm fm 238 92 U.

A: Given : symbol of atoms

Q: given You are metal alloy nanoparticles. determine the How will you Size 도 the Chemical Composition…

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Q: draw a diagram for the valence bond theory that shows the hybrid atomic orbitals and/or the atomic…

A: Ketene structure.

Q: For the reaction: 4NO(g) + O2(g) →→→ 2N₂O3(g), the rate of disappearance for O₂ is 2.30 x10-4 M/s.…

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Q: (a) For each of the following structures A - D, indicate whether it is chiral or not. Explain. 11.…

A: We have find out the chiral and achiral compounds.

Q: Assuming the following reactions are in equilibrium, which will not be affected by pressure changes…

A: -> The equation in which gaseous reactants and gaseous  products are in equal number, that will…

Q: 4) Which of the following can function as a chelating agent? (Hope you know w b) CO c) H₂NCH₂CH₂ b.…

A: Chelating agent - A ligand which has at least two donar atom and both the donar atom can form bond…

Q: Which of the following is a polyalphabetic cryptosystem? O Vigenere cipher O Caesar cipher O Pigpen…

A: We have to tell best polyalphabetic cipher . It have benefits of hiding letter frequency. So a is…

Q: What are the fatty acid and alcohol from which the following wax is produced?…

A: We have to give the fatty acid and alcohol produced from the below given wax. The given options are

Q: 12) Obtain the mass defect and the binding energy per mole for the Pb nucleus. We isotope to undergo…

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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.