An electron in the hydrogen atom make a transition from the ground state to an excited level by absorbing energy from a photon. The wavelength of the photon is 95.0 nm. What is the final level that the electron can reach?

Q: Dindicates concentrat on che pH of a solution, ha

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Q: Calculate the energy content (in Joules) of a 1.00 g of food product that is placed inside a…

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Q: How many mL of a 0.630M NaOH solution are needed to neutralize 20.0mL of a 0.255M HaSO4 solution?

A: Molarity of NaOH(M1) = 0.630 M Volume of H2SO4(V2) = 20.0 ml Molarity of H2SO4(M2) = 0.255 M

Q: Propose an efficient synthesis for the following transformation The transformation above can be…

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Q: A student in conducting molecular weight determination of an uninown diprotic acid. He first…

A: KHP dissociates completely to form K+ and HP-. HP- then acts as weak acid. KHP and NaOH are…

Q: For the following reaction, identify the species that undergoes oxidation and the species that…

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Q: Compute for the pH and generate a titration curve for the titration of 50.0 mL 0.0500 M NaOH with…

A: Here the analyte is NaOH and the titrant is HCl, both of which are strong and monoprotic.  Hence we…

Q: Calculate the pH of a solution prepared by mixing 0.0660 mol of chloroacetic acid plus 0.0110 mol of…

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Q: 2) When acid is added to a color indicator, it changes from purple to pure blue at a pH = 5.75. When…

A: Acid-base indicators: They are chemicals used to determine whether an aqueous solution is acidic,…

Q: A solution is formed by dissolving 15.5 g of sodium phosphate with 50.0 g water at 25.0 oC.  What is…

A: Formula used :-  (P° - P) /P° = wM/Wm  Where  P° = vapour pressure of pure solvent  P = vapour…

Q: Given the reaction: HBr + NH3 ↔ Br- + NH4+ One of the Bronsted-Lowry conjugate acid-base pairs is:…

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Q: property of acids?   a. tastes bitter   b. turns blue litmus red   c. forms hydrogen gas with…

A: Acids are substances which gives H+ ion in aqueous solution.  Acids taste sour ,not bitter.

Q: Fumaric acid (H2C4H2O4) is found in annual flowering plants belonging to the genus Fumaria and is…

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Q: Des Martin Periodinane CH CH pH 45 10. H. KCN HCN CH-CHCH, THE ether 2. H0

A: All the given reactions involve the conversion of one functional group into other functional groups…

Q: a) A saturated hydrocarbon having molecular formula of C6H14. Draw all possible structural isomers.…

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Q: Will a precipitate form when 25.00 mL of 0.0005 M Ni(NO3)2 is added to 25.00 mL of 0.00025 M Na2CO3?

A: Solubility Product is the dynamic equilibrium that exists when a chemical compound in solid state is…

Q: 1. What are the possible / and m, values for n=4?

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Q: 00 HO O more than one response is correct 19. Apply the Bronsted theory of acids and bases to the…

A: We have to predict acids and bases according to bronsted theory.

Q: For each of the following disaccharides, circle the glycosidic linkage and indicate the type of…

A: here we are required to identify the glycosidic linkage and indicate the type ofglycosidic linkage

Q: Use the References to access important values if needed for this questie A sample of oxygen gas…

A: Given-> V1 = 7.81 L T1 = 43.0°C = 43.0 + 273 = 316 K P1 = 1.16 atm V2 = 6.25 L P2 = 1.57 atm T2…

Q: You have an upset stomach and take an antacid. The behavior of the antacid is best described as…

A: Antacids are medicines that neutralize the acid in the stomach and gives relief to heartburn , upset…

Q: Wetlands can play a significant role in removing fertilizer residues from rain runoff and…

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Q: Au(I) complexes are aurophilic and isoelectronic with O Hg(II) O Pt(II) O Pd(l) O Ir(III) O Rh(I)

A: Isoelectronic species are the ones which has same number of electrons.

Q: Lareina the laboratory technician is given the task of making a solution containing HOBr…

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Q: Consider the titration of 25.0 mL of 0.118 M acetic acid (CH, COOH. pK, 4.75) with 0.100 M NaOH. CH,…

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Q: From standard reduction potentials, calculate the equilibrium constant at 25 °C for the reaction…

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Q: In the following equation determine if HCI is acting as an Arrhenius acid or a base, explain? HCI…

A: According to arrhenius theory  Acid is proton donor  Base is proton accepter

Q: What is the pH of a 0.35 M solution of trimethylamine, (CH3),N (Kb = 7.4 x 10 5)?

A: Given : concentration of (CH3)3N solution = 0.35 M  Kb for (CH3)3N = 7.4 × 10-5  To calculate :-  pH…

Q: How many milliliters (mL) of a 0.630 M NaOH solution are needed to neutralize 20.0 mL of a 0.255 M…

A: The balanced chemical reaction for the acid base neutralization reaction is as below- 2NaOH + H2SO4…

Q: Propose a synthesis for the following alcohol. of ОН

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Q: In a cell, 0.50 mL of 0.75 M NaOCl and 2.50 mL of 5.50 x 10-6 M aqueous dye were mixed. The pseudo…

A: Given that, in a cell, 0.50 mL of 0.75 M NaOCl and 2.50 mL of 5.50×10-6 M of an aqueous were mixed.…

Q: Which of the following ions are always present in an acidic solution?   a. hydronium ions   b.…

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Q: Which of the following aqueous solutions has the highest boiling point? Group of answer choices 0.2…

A: -> When non electrolyte dissolved in solvent then boiling point of formed solution is greater…

Q: 5. What are the tips you can give in choosing and using insect repellants?

A: Centers for Disease Control (CDC) have laid down the following  standards  for choosing insect…

Q: How many calories are given off by 5 grams of 100 deg C steam that changes phase to 5 g of ice at 0…

A: The stepwise calculation for the total heat involved in this phase transition of is as follows -…

Q: 30. Based on the given data, which of the subatomic particles is the lig Particle Charge Mass (kg)…

A: Atomic number = number of proton, Atomic mass = no. of proton + no.of neutron

Q: HyC HCI CHy HCI HyC CH CH, HCI HyC CH, CH CH,

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Q: 20. A diagram representing water molecules in the solid phase (ice) is shown below. Which of these…

A: * The change of state in matter is conversion of solid to liquid or gas . When the solid substance…

Q: According to the Bronsted-Lowry theory, a base is a:

A: According to Bronsted- Lowry theory any species that can accept a proton is base and species that…

Q: At pH 1, superoxide ions are is largely present in water as? о НО2 O H202* O HO22- O 02 O H2O,2+…

A: The superoxide ions formula is O2-.

Q: Calculate the gravimetric factor used to obtain the % Ca when if your final precipitate is…

A: Given that -  Compound - CaC2O4-H2O  And, atomic weights of different elements are -  Ca = 40, C =…

Q: when a force is app When force is rema Rubber band has a It satisfies all other nly nd II and III…

A: Rubber band is considered as a solid because stretching the rubber, its shape is changes ,after it…

Q: Calculate the maximum number of possible stereoisomers of 2-methylocta-4,6-1-amine using the…

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Q: how important is chemical bonding in the production of polyvinylchloride?

A: PVC is produced mainly from the polymerising the Chloroethene It is sometimes also called as…

Q: The difference between methyl orange manual And the red instance guide

A: the solution is shown below.

Q: What is the activity coefficient for each ion at the given ionic strength at 25 °C? Activity…

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Q: A solution is prepared at 25 °C that is initially 0.28M in propanoic acid (HC,H,Co,), a weak acid…

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Q: 2. In free radical polymerization, the polymerization of CHCH-CHOCOCH,allyl acetate) is very slow…

A: The chemical species which have unpaired electron and can exist independently are known as the free…

Q: Tennis balls are usually filled with either air or N2 gas to a pressure above atmospheric pressure…

A: The temperature, pressure, volume, and mole of the gas present in the tennis ball are related by the…

Q: what Ps the UPAC name: OH a) 3-methylpent-1-en-5-01 3-methylpent-s-en-1-01 3-methylpent-4-en-)-01 8)…

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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.