Assume that a molecule absorbing a photon has two possible outcomes:  1) photolysis (bond breaking) and 2) fluorescence.  Which outcome is more likely at longer wavelengths compared to short wavelengths?

Q: Determine the pH of the following solutions, given that Ka (HF) = 6.8 x 10-4. Hint: 1. Diagnose the…

A: a) NaF (F- ions) reacts with water and HF (hydrofluoric acid) and OH-(hydroxide ions) are formed. HF…

Q: 9.00g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Given data 9.00g of a certain Compound X molecular molar mass of 60.g/mol   Co2=13.20g water=5.40g…

Q: What's the reason/s why organic compounds are more flammable than inorganic compounds? when ethanol…

A: To answer this question we first need to know what are organic compounds and what are inorganic…

Q: Use the References to access important values if needed for this question. Submit Answer Be sure to…

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Q: Suppose a 250. mL flask is filled with 1.2 mol of Cl₂ and 0.60 mol of HCl. The following reaction…

A: Given -> H2(g) + Cl2(g) <-----> 2HCl(g)  Mole of Cl2 = 1.2 mole  Mole of HCl = 0.60 mole…

Q: For the synthesis of triphenylmethanol, what was the main precaution used to safeguard you from the…

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Q: At 900.0 K, the equilibrium constant (Kp) for the following reaction is 0.345.   2 SO2 (g)   +   O2…

A: Given data  (Kp)= 0.345 2 SO2 (g)   +   O2 (g)   <=====>   2 SO3 (g) SO2 is 36.9 atm O2 is…

Q: Part I. Free Energy - What's Up With That? 1. Write out the equation for Free Energy and define what…

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Q: 8 100 D 4000 T n 3000 2000 What can be said about this unknown based on its IR spectrum? The unknown…

A: Here we are required to find the functional group present in the compound

Q: In a polar covalent bond, A) both atoms in the bond have the same level of electronegativity. B) one…

A: Here we are required to find the statement which is true for polar covalent bond.

Q: What is the number of formula units in a 1.10 mol sample of CaO?

A: Given, Number of moles of CaO = 1.10 mol Number of formula units = ? Note: 1 mol of CaO contains…

Q: Carbon disulfide gas and oxygen gas react to form sulfur dioxide gas and carbon dioxide gas. What…

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Q: Calculate the pH when 0.040 mL, 0.5 M sodium hydroxide titrant is added to 30 mL, 0.5 M acetic acid.…

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Q: Provide the correct IUPAC name for Sr₃P₂.

A: IUPAC nomenclature is used for naming the organic compound as per recommended by international union…

Q: What is the pH at the equivalence point when you mix 20mL of 0.1M of some acid with 40mL of 0.05M of…

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Q: Draw the major organic product. (h) O 1. LDA 2. PhCHO (1 eq) Q KOH EtOH, A N HCI, H₂O A 1. Me,Culi…

A: Given some sequences to complete this .. In first question Robinson annulation reaction is the main…

Q: 6-which of the following is the IUP AC name of the tert-butyl alcohol? 2-methyl-1-propanol A) B)…

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Q: 0 310.04 5) Copper metal reacts with dilute (10 M) nitric acid by the following reaction. 3Cu(s) +…

A: This question can be answered using the concept of moles.

Q: A well insulated calorimeter contains 100 ml of water. 0.100 mal of solid potassium nitrate is added…

A: A calorimeter is an apparatus with insulating walls, used for measuring the heat changes before and…

Q: Consider the following reaction: PC1s (9) PC13(g) + Cl2(g) If 0.0264 moles of PCls (g), 0.588 moles…

A: The equilibrium constant value is the ratio of the concentration of the products over the reactants…

Q: Consider how best to prepare one liter of a buffer solution with pH = 10.75 using one of the weak…

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Q: Which isomer of 1-tert-butyl-3-ethylcyclohexane would you expect to be more stable?

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Q: 3.) A recent Japanese patent describes the reaction below leading to a single major organic product…

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Q: Copper(II) sulfate forms several hydrates with the general formula CuSO4·xH2O, where x is an…

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Q: Solid residue weighing 7.158 g from an aluminum refining process was dissolved in acid to give Al³+…

A: Mass of the original mixture containing Al taken for analysis = 7.158 g

Q: What is the Kb for the conjugate base of an unknown acid with a Ka of (5.3x10^-3) Note: Your answer…

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Q: Determine if the acids/bases are strong or weak.  b. Was the acid or base added from the burette?…

A: The given graph is a pH curve whose pH is decreasing with the addition of acid. Thus, x-axis is the…

Q: Use the table on the information page to predict if a reaction will occur when magnesium metal and…

A: •Here we have to write balanced reaction for Magnesium metal and Copper(II)sulfate. •As Magnesium is…

Q: Draw a lewis structure for this reaction.

A: To draw the Lewis structure for the given reactions.    A Lewis structure is a diagrammatic…

Q: Calculate the temperature increase of helium if a mole is compressed adiabatically and reversibly…

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Q: Calculate the change in entropy of 1 mole of N₂(g) is expanded from 20.0 L at 273 K to 300 L at 400…

A: Given : T1 = 273K T2= 400K               V1 = 20L  V2 = 300 L

Q: 5H₂C204+ 2103 + 2H+10CO2 + 12+ 6H₂O In the above reaction, the oxidation state of carbon changes…

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Q: MATTER AND MEASUREMENT REVIEW 2. What is the percent error in a measurement of the boiling point of…

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Q: Cobalt(II) chloride forms several hydrates with the general formula CoCl2 ·x H2O , where  x  is an…

A: Here we are required to number of hyrate attached to the salt.

Q: What is the minimum mass of magnetite Fe3O4, a iron ore, from which 165.g of pure iron could be…

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Q: MISSED THIS? Read Section 15.4 (Pages 642-649); Watch KCV 15.4, IWE 15.4. The following reaction was…

A: Since the plot of 1/[AB] versus time(s) graph is a straight line, this is a second(2nd) order…

Q: (NO3)- (H30)+ (NH4) HCN 03 NF3 (NO2)- H2CO CHC13 CS2 [Choose] [Choose] [Choose] [Choose ] [Choose]…

A: While looking for geometry of molecule, lone pair of electrons are considered. While looking at the…

Q: NO3 + 2CIO2+ H₂OHNO₂ + 2C1O3 + H+ In the above reaction, the oxidation state of nitrogen changes…

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Q: 6. Draw the resonance structures for the following compound. li a) DAN b) + c) d) :0% Ô H

A: Here, we have to draw the resonance structures of the given compounds.

Q: The amino acid threonine is one of the common natural building blocks for proteins. Unlike many of…

A: Stereochemistry is a branch of chemistry that deal with three dimensional arrangement of atoms…

Q: Draw the product of the E2 reaction shown below. Ignore any inorganic byproducts. Br Draw the E2…

A: E2 elimination refers to bimolecular elimination in which a base abstract a proton and the a alkene…

Q: What is the major substitution product of the following reaction? NaOH heat OH Br Br OH ? Br

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Q: a. b. C. d. 18. How many electrons, protons, and neutrons are in each of the following? c. Cobalt-58…

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Q: Consider the drug naproxen, a nonsteroidal anti-inflammatory drug sold under the brand name Aleve,…

A: Here, we have to find the statement that is true about the given structure of naproxen.

Q: Draw models for the molecule that will form between nitrogen and hydrogen atoms.  Electron Dot…

A: we have to draw electron dot diagram and structural formula for the given molecule

Q: A 9.00 L tank at -3.2 °C is filled with 17.1 g of chlorine pentafluoride gas and 11.6 g of sulfur…

A: The mole fraction of a component in the mixture is defined by the ratio of moles of that substance…

Q: 7. Write the letter of each sentence that is true about the nuclear theory of atoms suggested by…

A: Using alpha particle scattering experiment Rutherford discovered the nucleus of atom .

Q: At a certain temperature the rate of this reaction is first order in H₂CO, with a rate constant of…

A: Given : rate constant= 0.0158 s-1

Q: Determine the number of sets of equivalent protons for cis-1,2-dichlorocyclohexane. CI CI

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Q: You add 7.50 mL of 0.050 M NaOH to 50.00 mL of pure water, and to this mixture you then add 1.50 mL…

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Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.