A hydrogen atom with its electron in the n =5 energy level emits a photon. a. To what energy level does it move, if the photon has a wavelength of 430 nm? b. What is the frequency of this emitted photon?

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A: Option A is correct answer.  

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A: The solubility equation of Mg(OH)2 is given as, Given: H+ is added.  

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Q: If a 0.690 ? aqueous solution freezes at −3.00 ∘C, what is the van't Hoff factor, ?, of the solute?

A: The correct answer is given below

Q: ОН НО НО. ОН H H H

A:

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A: The energy diagram given is,  

Q: Take the effective spring constant of a vibrating HCl molecule as 480 N/m. The mass of the hydrogen ...

A: The energy of any vibrating molecule is quantized in the same way as the energy of  electron in a hy...

Q: Determine the volume occupied by 88 grams of ethane (C2 H6) gas at STP 全 T 面 1 Upload files

A: Mass of ethane = 88 g 

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Q: Write the expression for the equilibrium constant for each of the following reactions. Write the pre...

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Q: Find [Cu+] in equilibrium with CuBr(s) and 0.10 M Br2.

A: Concentration of Br2 = 0.10M Ksp of CuBr = 5 × 10-9 

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Q: An experiment is conducted in which a quantity of H2(g) is chemically generated in a closed headspac...

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A: Bronsted acid is donate proton and base is accepted proton

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Q: What is the molarity of K+ in a solution that contains 89.72 ppm of K3Fe(CN)6 (329.3 g/mol)?

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Q: Explain in detail how you would go about calculating the percent oxygen in magnesium nitrate.

A: To determine: Percent of oxygen in magnesium nitrate i.e. Mg(NO3)2. Assuming 1 mole of Mg(NO3)2.  

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Q: Predict the product for the following reaction. 1. Br2/H20 2. NaOH Br Br OH Br HO II II IV II O IV

A: The reaction given is,  

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A: Given: Volume of sample used = 2 mL. Initial sample is diluted to 100 mL. And Mohr method is used.  

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A:

Q: A group of students were trying to experimentally determine the density of an unknown liquid. They d...

A: The data given is, And the volume of the liquid = 5.00 mL.  

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Q: Tabulate Group A anions according to Reagents used and Results of Reactions

A: Group A anions includes HCO3- , CO3-2, CH3COO- ,S-2 , SO3-2 , S2O3-2 , NO2- ions.

Q: Calculate the binding energy of the nucleus of one mole of B-11. The nuclear mass of B-11 is 11.0065...

A: Given: Isotope B-11 i.e. 115B.  

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Q: The flame test would NOT easily make a distinction between which two ions? O strontium and calcium i...

A: Since you have posted multiple questions, we are entitled to answer the first only. 12) The ion pair...

Q: What is the molecular weight of Magnesium Oxide (g/mol) Mg=24 O=16

A: molecular weight of Magnesium Oxide can be calculated  by knowing  the mass of each atoms of Magnesi...

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A: Given question is : What liquid does an antacid dissolve faster = ?  Options are : (a). hot water  (...

Q: Question: Can (-) and (+)-camphor be distinguis by their 1H NMR spectra?

A: (+) camphor is (1R, 4R)-(+)-camphor (-) camphor is (1S, 4S)-(-)-camphor

Q: Qualitatively pre entropy For each chemical reaction listed in the first column of the table below, ...

A: Reactions : MgCl2(s) + H2O(L) ---> MgO(s) + 2HCl(g)  2C2H6(g) + 7O2(g) ---> 4CO2(g) + 6H2O(g) ...

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A: Organic reactions are the reaction in which organic reactant react to form organic products.

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A: The boiling points of aldehydes and ketones is higher than that of alkanes but lower than that of al...

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A: IR provides the information about the functional groups of unknown. 1H-NMR provides the information ...

Q: How many grams of solid Cu2SO4 5H2O (249.68 g/mol) must be dissolved in 400 mL of water to obtain a ...

A: Given :-  molarity of Cu+ ions = 0.0899 M  volume of water = 400 mL  molar mass of Cu2SO4 5H2O = 249...

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A: The order of reaction can be determined by compairing the rate of expression of any two experiments.

Q: The equation for the dissolving of magnesium hydroxide is: Mg(O H)2(s) + heat 2 Mg2+ "(a q) + 2 O H ...

A:

Q: The Kb of C6H5NH3+ is 3.98x10-10 The Kb of C6H5NH3+ is 3.98x10-10 What is the [H3O+] concentration...

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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.