12. The electron on a hydrogen atom moves from n=4 to n=2 energy level. Calculate the wavelength in nm of the photon emitted by the hydrogen atom.

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A: The Gibbs free energy tells about the energy which can be used for doing useful work. This parameter...

Q: In an experiment, it is found that 0.00124 mg of hexachlorobenzene (CeCla) can be dissolved in 200 m...

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Q: When B2H6 reacts with oxygen to form HBO2 and H2O, what mass of B2H6 will be needed to burn 36.1 g o...

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Q: What impurity was likely removed during the recrystallization necessary ?

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Q: Which diagram shows the outer shell electron arrangement in a molecule of methanol, CH3OH? A B H H H...

A: Octet Rule :-  During the formation of a molecule an atom of an element lose, gain or share electron...

Q: - Next, the 1H and 13C spectra of each of the three isomeric ketones with formula C7H14O are present...

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Q: 100-g of 85.0% by mass potassium hydroxide is dissolved to make a 500-mL  solution. What is the form...

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Q: The equilibrium constant, K, for the following reaction is 2.44x10 2 at 518 K. PCI5(9) 2 PCI3(g) + C...

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Q: Name Of Experiment: Determination Of Nitrite in water. Q1: Discusion Q2: Purpose of experiment 03: I...

A: Answer - 1. Discussion - According to the question - During the quantity detection of water it is im...

Q: 4. Calculate the molar concentration of a 20.0% solution (w/w) of KCI that has a specific gravity of...

A: Number of moles is calculated by dividing the given mass with molecular mass.

Q: Question 1: Using a well-known protein estimation technique, absorbance reading for a set of standar...

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: At constant volume, a sample of Hydrogen gas was changed to 2.5 atm and 115 K, if the initial temper...

A: It is an application of combine gas law. hydrogen gas behave ideally we are required to find the ini...

Q: Determine the concentration of a solution that contains 825mg of Na2HPO4 dissolved in 450.0mL of wat...

A:

Q: lodine is used as a catalyst in the decomposition of hydrogen peroxide. How is the concentration of ...

A: Catalyst is a substance which can increase or decrease the rate of reaction without itself consumed ...

Q: At constant volume, a sample of an oxygen gas with a temperature of 27°C and pressure of 2 atm is in...

A: Gay-Lussac’s Law: According to Gay-Lussac’s law, if we increase the temperature of a definite amount...

Q: Which of the following is a CORRECT name according to the IUPAC rules? a. 2-ethyl-2-methylpentane b...

A: ->In IUPAC naming first of all we see longest carbon chain.  

Q: Use the References to access important values if needed for this question. When the following skelet...

A: Concept  1) The species which oxidised others while reduced itself is called oxidising agent.  2) Th...

Q: 100g of two unknown metals are presented. You take a blow torch to both for 10.00s. You notice that ...

A:     100 kg of two unknown metal are heated for 10 .00 sec, using a blow torch. Metal A is incredibly...

Q: For each pair of isomorphous substances, select which would have the lattice energy of lesser magnit...

A: lattice energy is the measure of the stability of any compound Here we are required to find from the...

Q: Calculate the number of moles of KOH in 6.50 mL of a 0.430 M KOH solution. What is the pOH of the so...

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Q: 28. Calculate the overall net charge for the tripeptide leucine-lysine-histidine for pH = 1, 3, 5, 7...

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Q: You started with 1.000 g of unknown and isolated 0.9550 g of metallic Cu. What is the calculated for...

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Q: Determine the [H*], pH, and [OH] in the following. a. 5.25x10 M HCI solution b. 4.56x107 M NaOH solu...

A: Note : As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost...

Q: Which of the following terms best classifies the following molecule? N.

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Q: Predict the molecular structure, bond angles, and polarity (dipole moment) for each of the following...

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Q: A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate form...

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Q: ne percent yield? (At.

A:

Q: 14. How many atoms of oxygen are contained in 500. g of Fe,(S0,)3? 15 Find the molor nogg of Ee (CO)

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Q: Fihd the mass (grams) of one Hg (mercury) atom. (use 4 s.f.) 12. How many grams of O2 gas are there ...

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Q: A galvanic cell is powered by the following redox reaction: 2+ 2 Zn (aq) + N,H,(aq) + 4OH (aq) 2 Zn(...

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Q: An ideal gas ina cylinder fitted with a piston expands at constant temperature from a pressure of 6 ...

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Q: 1.50 g hydrocarbon compound undergoes combustion to produce 8.80 g of CO2 and 5.40 g of H2O. What is...

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Q: The rate of a certain reaction is given by the following rate law: rate= Use this information to ans...

A: "To get remaining sub-parts solved please repost the complete question and mention the sub-parts to ...

Q: 2.61 At a temperature of 60°F, what pressure must be imposed in order for water to boil.

A: This problem can be solved using Clausius -clapeyron equation

Q: Determine the concentration of a solution that contains 825mg of Na2HPO4 dissolved in 450.0mL of wat...

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Q: balanced chemical equation

A:

Q: Which of the following reactions occurs by a one-step mechanism as opposed to a two-step mechanism?

A: In case of A this is 2 step reaction, first pi electron of the double bond attack the acidic hydroge...

Q: changed to 12.0 L and 452K, if the initial volume of the sample was 18. 0 L. What is the initial tem...

A: Initial Volume = 12.0 L Initial Temperature = 452 K Final Volume = 18.0 L Now, Using Charles law, V1...

Q: Which of the following structural formulas represent identical compounds and which represent constit...

A: Identical compound: e & h      Constitutional isomers: a & f & i & g & k & l...

Q: H,C CH, Give the following: parent name: substituents: IUPAC Name:

A:

Q: 9. A piece of aluminum is heated to a temp of 71.8°C, then placed in 150.0 mL of water at 20.7°C unt...

A: Given data, For Aluminum, Cp =0.903 J g-1 ℃-1 mass m=? T1=71.8 ℃  T2=25.6 ℃  

Q: Weight of sample (g) Vx mEw Weight ) N = 100

A:

Q: ne overall order

A:

Q: • Use the table of Bond Energies (BE) in the table below to calculate the Heat of Reaction, AHxn for...

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Q: 100-g of MgSO4*7H2O is dissolved in 900 g of water. If the density of the solution is 1.047 g/mL, wh...

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Q: na hydroxy group.

A:

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are ...

A: Precipitate is the solid residue obtained at the bottom of the solution.

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.