Explain (in point form) how a ground state hydrogen atom can emit IR and then BLUE visible light when its electron has only been excited once.

Q: calculate the % yield of the preparation of benzocaine: mass of 4-aminobenzoic acid = 2.75g molar…

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Q: 87.23 grams of a gas occupies 45 L at 600 mm Hg and 25 C. What is the molar mass of the gas ?

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Q: ). A 12.5% (w/w) NiCl2 (129.61 g/mol) solution has a density of 1.149 g/mL. Calculate a) The molar…

A: The density and percentage can be used to calculate the molarity by using following relation - M =…

Q: Q2. What is product for the following reaction? Click the correct structure Hint: This is called an…

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Q: 7. Calculate the AHReaction for the reaction 2H2(g) + CO(g) CH3OH(/) Using the following equations:…

A: Given that -  CH3OH(l) + 1/2O2(g) ----> C(s) + 2H2O(l) , ∆H1 = -304.97 kJ    ----(1)    C(s) +…

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

A: Lindlar's catalyst  used to reduce alkyne into cis Alkene... Alkene with peroxyacid  gives epoxide…

Q: Solid iodine, I2(s), has an enthalpy of sublimation AHsubl = 62.4 kJ mol. Suppose 2.61g of iodine at…

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Q: What is the correct IUPAC name of the structure presented. (Follow this format “Branch-Carbon…

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Q: Directions: Mark check the use/s of the organic compounds in the table below. Organic Compounds…

A: Given organic compounds: Gasoline  Rubbing alcohol Acetone  LPG Kerosene Vinegar Their uses have to…

Q: Create a schemantic diagram of qualitative analysis for CoCO3.

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Q: Using a secondary alcohol of your choice as an example: i)give the displayed formula of the product…

A: As we know,  secondary alcohol is the alcohol in which OH group is attached to secondary carbon. As…

Q: What species is the oxidizing agent in the reaction below? CIO + Cro, → CI¯ + CrO, 2- CI CrO, а. с.…

A: Oxidising agent: those species reduces itself and oxidise others are called oxidising agent.

Q: Consider these reactions: Reaction 1: H2 (g) + Cl2 (9) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2 (g)…

A: Reaction 2 is considered as exothermic reaction. Because, the delta H value is negative. That means…

Q: Use standard enthalpies of formation, AH;, to calculate the AH?xn for 2 NO(g) + 2 H, (g) → N, (g) +…

A: Answer: Formula to calculate enthalpy of reaction from the enthalpy of formation is shown below:…

Q: When 0.279 g of a molecular compound, benzoic acid, was dissolved in 43.0 g of benzene, the freezing…

A: Depression in freezing point :-  When a nonvolatile solute is added to pure solvent then its…

Q: Sample Problem: A water sample was tested for iron content, but was diluted prior to obtaining the…

A: Given, Volume of solution = 10.0 mL Dilution volume = 100.00 mL Concentration of diluted sample =…

Q: Identify the incorrect part of the compound name. LOCANT CHAIN LENGTH PREFIX SUBSTITUENT…

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Q: A 150.0 g block of lead at 100.0 °C is placed in a calorimeter with 50.0 g of water at 22.0 °C. The…

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Q: 23. If I have a bottle of unknown substance at a pressure of 34200 torr and temperature of 373 K,…

A: Answer: In the question phase diagram is given that tells us the interpretation of various physical…

Q: Provide the polarity, length, energy, order and hybridization of propane.

A: Propane CH3 - CH2 - CH3           Propane is a non-polar molecule. Because its symmetric and the…

Q: For each set of three structures, choose the structure that is not an isomer of the other two. но, C…

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Q: 1. Aqueous dilution of I0, results in the following reaction: 10. jac) + 2H,O H,lO. (ac) and K = 3.5…

A: GIVEN:-

Q: Calculate the molar concentration of H3PO4 commercial reagent that is 86% (w/w) and has a specific…

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Q: Compound X is optically inactive and has the formulaC 16H 16Br 2. On treatment with strong base, X…

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Q: 11-73 Propose a structure for an alkyl halide that gives only (E)-3-methyl- 2-phenyl-2-pentene on E2…

A: An elimination reaction is a type of organic reaction in which two substituents are removed from a…

Q: 2-bromo-4-ethylthiolane O 3-methyl-5-bromothiolane O 5-bromo-3-methylthiolane

A: Thiolane is a five membered sulfur containing ring.  The molecular formula of thiolane is (CH2)4S

Q: How does washing with 10% sodium bicarbonate help to isolate ethyl cinnamate in each synthesis…

A: To answer how does washing with 10% sodium bicarbonate help to isolate ethyl cinnamate in each…

Q: Given Carbon Tetrachloride, CCI.. The most electronegative element is Draw the skeletal structure,…

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Q: Exactly 100 mL of 0.15 M nitrous acid (HNO2) are titrated with a 0.15 M NaOH solution. (a) Calculate…

A: Answer: In this question we have to calculate the pH of 4 types of solutions: 1. Acid solution 2.…

Q: Name and indicate

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Q: Compute for the total acidity of the food sample assuming that ten grams of sample was dissolved to…

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Q: Need solution to all if not answered I'll downvote solution       Which of the reactions are…

A: Redox reactions are those reactions in which both oxidation and reduction take place simultaneously.…

Q: An analyst conducted suction filtration for a certain 3.0 gram of solid. After filtration, the…

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Q: Based on TLC, how can you tell if the reaction is complete and what is the relevvance of the…

A: Answer: TLC- TLC (This layer chromatography) is the separation technique used to determine the…

Q: A student determined that it took 5.65 mL of NBS to reach an endpoint with a standard solution that…

A: Solution - According to the question - Given - 5.65 mL NBS is used to reach end point concentration…

Q: 11-64 The tosylate of (2R,3S)-3-phenyl-2-butanol undergoes E2 elimination on treatment with sodium…

A: We must note here Z product is forming. Let us discuss the reaction.

Q: Use the table below to answer the following questions Name of acid Acetic Acid (HC2H302) Formic Acid…

A: The acids given are,

Q: QUESTION 6 For each of the following reactions which of substitution products is correctly…

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Q: Discuss in detail TWO types of invention that can be use to measure pH either quantitative and…

A: HYDROGEN ELECTRODE METHOD A hydrogen electrode is made by adding platinum black to platinum wire or…

Q: In the standardi zation of HCl using pure anhydrou s sodium carbonate as primary standard for methy…

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Q: Consider that the determination of potassium iodide (MM-166.00 g/mol) from a food supplement was…

A: Given the mass of the sample containing potassium iodide(KI) taken for analysis = 0.5240 g The…

Q: You performed an experiment in order to determine the quantitative analysis of total aldehyde…

A: Total weight of lemon oil = 5 g Volume of 0.5 N KOH used = 2 mL To calculate the total aldehyde…

Q: Determine the heat of reaction for the oxidation of iron, 4 Fe(s) + 3 O2(g)  2 Fe2O3(s) given the…

A: The reactions given are, 1) 2 Fe (s) + 6 H2O (l) → 2 Fe(OH)3 (s) + 3 H2 (g)…

Q: A 25.00-mL aliquot of 0.1000 M maleic acid was titrated with 0.1000 M NaOH. The pH values at the…

A: For maleic acid, pKa1 = 1.9, and pKa2 = 6.07

Q: .N. HN- N. imidazolo[4,5,d]pyrimidine O imidazolo[5,4,b]pyimidine imidazolo[4,5,b]pyrimidine

A: Option A is correct.

Q: A reaction is found to be first-order with a rate constant of 0.0525 s–1. If the reaction initially…

A: To solve this question, use the integrated equation for first order reaction and find out the time…

Q: 4. Sodium hydroxide solution was standardized against one gram of potassium acid phthalate. First…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 8. For the reaction: Ca(OH)2(s) + CO2(g) – CaCO3(s) + H2O(1) a. Balance the reaction b. Use the…

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Q: What is the correct IUPAC name of the structure presented. (Follow this format "Branch-Carbon…

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Q: 7. Define back-titration. What is the concept behind this method?

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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.