What is the significance of whether the fluorescent substance in fluorescent tubes has a short or long phosphorescence?

Q: A mixture of three compounds A, B, and C spotted on an alumina TLC plate gives the following Re…

A: Given :  Rf Value of various compounds  are given. And also the Given methanol is polar solvents. To…

Q: at a certain temperature, 0.980 mol SO, is placed in a 3.50 L container. 2 SO₂(g) 2 SO₂(g) + O₂(g)…

A: In this reaction, 2 mole SO3 produce 2 mole SO2 and 1 mole O2. at equilibrium, [SO2] = 2 ×[O2] Kc =…

Q: Starting from the definition of Cp and Cv, derive the expression of (Cp-Cv) expressed only in…

A: The concept used in this question is from chemical Thermodynamics .  According to the question Heat…

Q: What is the molality of ions in a solution prepared by dissolving 37.2 g of a soluble salt, MX2,…

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Q: Determine the product(s) in the reaction below. A. D. A and C E D с CI OH + HCI B. OH E. B and C CI…

A: Here the reaction is a nucleophilic substitution reaction. Cl- acts as a nucleophile and the Spiro…

Q: It says change in H is incorrect.

A: Excess of HCl means NH3 is limitting reagent and hence moles of product depends only on moles of NH3…

Q: a. Provide names for both metabolites. b. What kind of reaction occurs here? c. What enzyme…

A: Note : According to our guidelines we are supposed to answer only first three subpart of question.…

Q: Bronze is an alloy made of copper (Cu) and tin (Sn). The volume of the cylinder is 6.010 x 10³ cm³.…

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Q: Chemistry Demonstrate using energy plots of E vs. progress of reaction and accompanying brief…

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Q: lage biological mo than microwaves y than infrared light such as w es su

A: Electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their…

Q: The zinc content of a 1.03 g ore sample was determined by dissolving the ore in HCl, which reacts…

A: According to the question we have, The mass of the ore sample is = 1.03 gm The volume of the HCl…

Q: What is the pH of 0.400 M ammonia soln? (Kb = 1.8 x 10-5) (Round-off your answer to two decimal…

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Q: At 25.0 °C the Henry's Law constant for nitrogen trifluoride (NF3) gas in water is 7.9 × 10 M/atm.…

A: Henry's law, a gas law in physical chemistry, asserts that the amount of dissolved gas in a liquid…

Q: ОН CH2OH OH ОН ОН Identify each pair of relationships among the -OH groups in a-mannose as cis or…

A: Cis and trans are geometric isomers which depends upon the geometry of respective groups.

Q: + Alcl3 대 3대2CH221 7 ~ CH3CH₂CH2CH₂ H shift 1° 3 +

A: what is degree 1 and degree 2？what does it means in organic chem II？

Q: C Calculate the moles of sulfuric acid needed to neutralize the base. (To avoid introducing rounding…

A: Answer: Moles of a compound is always equal to its molar concentration and volume of solution.

Q: Bronze is an alloy made of copper (Cu) and tin (Sn). The volume of the cylinder is 6.010 x 10 cm³.…

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Q: Gaseous butane (CH₂(CH₂)₂CH₂) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide…

A: Given - Weight of butane =33.7 gram Weight of oxygen =90.0g

Q: Draw the skeletal (line-bond) structure of 3-vinylcyclohexa-1,4-dier

A: The Skeletal (Line-Bond) Structure Of 3-Vinylcyclohexa-1,4-Diene is given below :

Q: 6. A quantity of liquid methanol, CH3OH, is introduced into a rigid 3.00-L vessel, the vessel is…

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Q: A 1 mL aliquot of standard KMnO4 solution A (4.0 ppm) gets added to 10 mL of unknown solution B.…

A: According to Lambert Beer law, the absorbance (A) is directly proportional to concentration (C). So,…

Q: A 6.00% (m/v) NaCl solution contains 35.5 g of NaCl. What is the total volume (V) of the solution in…

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Q: the correct number of significant figures! 1. How much energy is required to melt 100.0 grams of…

A: To solve this problem we will use the given data in the question . Heat of fussion of ice = 79.7…

Q: How many moles of carbon dioxide are contained in 53.7 g of CO2?

A: Since, Moles is the ratio of mass to the molar mass of the compound. Thus,

Q: Consider this molecular-level representation of a mixture of gases. 98 Po If the partial pressure of…

A: Dalton's law: Dalton's law of partial pressures states that in a mixture of non-reacting gases, the…

Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here. * 2,2,3,3-3,3-…

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Q: Suggest two ways to reduce the errors of determining the molecular weight of a polymer(polystyrene…

A: Polymer: A polymer would be a substance and material made up of macromolecules, which are very big…

Q: Question: The titration of a 25.0 mL sample of an aqueous solution containing HNO3 requires 18.6 mL…

A: Titration of a 25.0 mL of an aqueous solution containing HNO3 requires 18.6 mL of 0.150 M BaOH2 to…

Q: Hi there! Can you help me out? I understand that H2+Cl2--> 2HCl, which is a revesible reaction. Is…

A: Activation energy: Activation energy can be defined as the least amount of energy which needs to…

Q: What volume of 0.1650 M NaOH is required to titrate 17.00 mL of 0.1250 M HCl?

A: •GIVEN=> NaOH=> M1= 0.1650M and we have to find its volume(V1). •HCl=> M2=17.00 ml and…

Q: Which of the subshell designations are possible and which are Possible 3p impossible? Impossible 4d…

A: Given that, Which of the following subshells are possible and which are impossible? 4d  1.5p 1d 1f…

Q: 5 mg of a protein is dissolved in 0.1 mL of distilled water (final volume) to give a final…

A: Given data :  Weight of protein = 5 mg = 5 × 10-3 g  Final volume of volume = 0.1 ml = 0.1 × 10-3 L…

Q: Chemistry 3. (6%) Ca(HCO3 ) 2 is called calcium bicarbonate. It is one of the most abundant…

A: •In first question, we have to calculate the the molar concentration of HCO3-, normal concentration…

Q: Provide the correct IUPAC name for the compound shown her Br CI

A: Here we are required to find the correct IUPAC name of the system.

Q: A characteristic of the stoichiometry of condensation (step-growth) polymerization reactions is that…

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Q: is essentially the ratio between the reaction rates of a process adjusted for a 10°C temperature…

A: The explanation is given below-

Q: 4. What rule do the main group elements follow when forming ions?

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Q: Suppose a 2.00-mol sample of an ideal gas at a fixed temperature of 300 K expands against a constant…

A: Given that expansion occur at constant temperature which implies that process is isothermal.

Q: You dissolve 14.9 g of KCI in 1.00 kg of water. The volume of the resulting mixture is virtually…

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Q: Essential oils are concentrated liquid containing metabolites extracted from plant sources and are…

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Q: Use chemical equations to show how you would use any additional reagents to complete the following…

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Q: Here are two chemical structures. Which technique would best distinguish between them? Br Select…

A: 1H Nmr shows signals for the hydrogen atom.  Mass specta will show peaks according to the molecular…

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A: 1. Increasing boiling point: Compound A < Compound B < CompoundC 2.a. Compound A 2.b. The…

Q: pecific rotation of L-dopa in water is -39.5. The specific rotation of a solution of L-dopa and its…

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Q: 45. When 1.65 g of ethanal (CH3CHO(1)) is burned in a calorimeter to produce H₂O(l) and CO₂(g), 44.7…

A: Given data :  Mass of ethanal = 1.65 g  Heat released during the reaction = 44.7 KJ Firstly we will…

Q: Provide the least stable (highest energy) chair conformation of cis-1- hydroxy-3-ethylcyclohexane.…

A: cis-1-hydroxy-3-ethylcyclohexane. To provide: (i) Relative cis/trans stereochemistry (ii) Least…

Q: If the Mn of a batch of LDPE is 3.2x109 g/mol, what is the corresponding full contour length in…

A: Given: The molar mass of LDPE is 3.2 x 109 g/mol To calculate: Full contour length in Angstroms (Ao)…

Q: Identify the chirality centers as R or S in the Fischer projection of 4-chlorobutane-1,2,3-triol…

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Q: What are the four phases of matter? How can input of energy convert one phase of matter into…

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Q: For molecules containing atoms with electrons in p orbitals, energy-level diagrams become more…

A: To discuss the characteristics of second row diatomic molecules:

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.