A local AM radio station broadcasts at a frequency of 803 kHz.(1kHz=1000s^-1) calculate the energy of the frequency at which it is broadcasting.  Energy=?? kJ/photon

Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here.

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Q: A *H3N-C-H CH3 C H3C-C-NH3* H Four Fischer projection representations of alanine are shown below,…

A: The DL configuration of an organic compound is a relative configuration with respect to D and…

Q: What is the final pH of a buffer prepared by mixing 450 mL of 0.25 M Tris base with 130 mL of 0.50 M…

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Q: Which of the following sets of systems are in order of increasing entropy? A B C H₂(g), HBrO (g),…

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Q: A. If an element with the valence configuration 4s23d7 loses 3 electron(s), these electron(s) would…

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Q: 1. How many unpaired electrons are in the carbon atom? A. Paramagnetic B. Diamagnetic This atom is…

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Q: Calculate K for the following reaction Cu (s) + 2 Ag+ (aq) ⟶ 2 Ag (s) + Cu2+ (aq);…

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Q: Indicate, by letter(s), the position(s) on the ring at which substitution occurs when the aromatic…

A: In the question it is asked that if the given compounds undergo electrophilic substitution reaction,…

Q: 2. Describe the variation of the acid strength for the hydrogen halide series and explain which one…

A: Arrange the acids in increasing order of acidic strength--

Q: 11. What reagent can be used to convert 2-methylbutan-1-ol into 2-methylbutanal? A) Bleach B) LIAIH4…

A: Ans. Option (C) is the correct answer. The Swern Oxidation: The Swern oxidation, named after Daniel…

Q: a buffer solution that containing the same concentration of the acid and the salt will have a pH…

A: Given, A buffer solution that containing the same concentration of the acid and the salt will have a…

Q: 7. Provide the major organic product when 2-chloro-3-ethylpentane is heated to 45 °C in ethanol. are…

A: It will favour E1 mechanism over SN1 , SN2 because here ethanol will behave as base over…

Q: 2. Consider the case in which a molecule fluctuates between two different forms, each of which is…

A: Solution :  In this problem we have to calculate the estimated lifetime of each form of the…

Q: Draw the major organic product(s) of the following reaction. DMF Br + NaCN • You do not have to…

A: As the given halide is primary halide so the reaction occurred via SN2 mechanism.

Q: When Sara titrated the 20.00 mL of 0.04 M acetic acid, it required 40.0 mL of 0.02M NaOH to reach…

A: we have to calculate the pH at equivalence point

Q: The equilibrium constant K₁, K2 and K3 for the reactions below are S(s) + O₂(g) → SO₂(g), K₁ = 4.2 ×…

A: We can get equation 2 by adding equation 1 and 3 equation. We know that if we multiply any constant…

Q: 4. Propose a mechanism for the following reactions: a. b. محل -C=N EtO EtOH (1) CH,MgI (2) H3O+ но.…

A: 4. We have to give the mechanism for the given reactions.

Q: 2. The carboxyl group on a benzene ring is a(n) (ortho-para or meta) director in electrophilic…

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Q: What is the functional group of the product of the reaction below? H3 C H2 ether ketone carboxylic…

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Q: A mass of 7.16 g carbon monoxide is reacted with 6.84 g hydrogen to form methanol. CO(g) + 2 H₂(g) →…

A: CO(g) + H2(g) → CH3OH (g) The reaction performed in 5 L flask at 85°C. We have to calculate the…

Q: A compound is found to contain 7.522% phosphorus and 92.47 % iodine  by mass. a. What is the…

A: From the mole ratio of the element we can determine the empirical formula . Using empirical formula…

Q: The graph shows the molecular speed of four gases at 27 °C. What, if any, relationship is observed…

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Q: What is the pH of the solution at the equivalence point, when Caitlin has added 40.00 mL of the 0.25…

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Q: When

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Q: Which of the following is statements is/are TRUE about the experiment on the relative rates of…

A: Electrophilic substitution reaction rate depends upon group attached to the aromatic ring . Electron…

Q: The following information is given for silicon at 1 atm: Th=2355.00°C Tm 1410.00°C Specific heat…

A: Amount of heat needed can be calculated by summation of heat needed for the individual conversions.

Q: 火人 HO NalOa

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Q: Yolanda titrates 40.0 mL of 0.40 M HBrO with 0.10 M LIOH. What volume of lithium hydroxide is needed…

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Q: A mixture of methane and oxygen gases, in a 9.85 L flask at 15 °C, contains 1.96 grams of methane…

A: we have to calculate  partial pressure of oxygen  total pressure

Q: The average bond order is the number of bonds between two atums Laking into ac Draw a Lewis…

A: In Lews structure balance electron represent by dot. In this structure we can show bond as well as…

Q: Q1 The following table shows the first five ionisation energies of the elements A and Z in kJ mol-¹.…

A: Ionization energy is defined as the energy required to remove an electron from a gaseous atom or…

Q: In the proposed two-step mechanism of decomposition of ozone the oxygen is: step 1: O3=>O2 + O…

A: In the given the reaction mechanism of a question is given and the role of oxygen in this reaction…

Q: Provide the IUPAC name for the condensed structural formula shown here. CH3 CH3 CH3-C C-CH3 CH3 CH3

A: Rules for IUPAC nomenclature of alkenes: IUPAC nomenclature rules for alkanes: • Identify the…

Q: A correct definition is:  Instantaneous rate is ____    change in molarity per unit time.…

A: In the question the definition of instantaneous rate have been asked and the correct alternative out…

Q: 2. To prepare a solution of NaCl, you weigh out 2.634 (+0.002) g and dissolve it in a volumetric…

A: Mass of NaCl = 2.634 g (±0.002) Molar mass of NaCl = 58.44 g/mol (±0.0012) Volume of the solution =…

Q: Question 8 of 15 Provide the correct three-letter abbreviation for the following amino acid: Gln O=0…

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Q: Which one is occurring? State an observation. • A metallic deposit appears • Bubbles appear •…

A: Ans. (a) A metallic deposit appears Electrophoretic deposition (EPD) is a technique where charged…

Q: Zane added 12.0 mL of 0.20 M NaOH to the 25.0 mL of 0.40 M acid. What is the pH of the solution at…

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Q: You need to make an aqueous solution of 0.140 M manganese(II) sulfate for an experiment in lab,…

A: we have to calculate mass of manganese(II) sulfate needed to prepare the solution

Q: A first order reaction has a half life of 33 s. How long will it take for the reactant concentration…

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Q: What is the pH of the original 0.400 M propionic acid solution? KaHA = 1.34 x 10-5 pH of 0.40 M HA =…

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Q: 1. OsO4 (catalytic) 2. NMO

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Q: Joan decided to titrate 36.4 mL of 0.100 M HCI with 0.400 M NaOH. What is the pH of the solution…

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Q: One molecule of hemoglobin will combine with four molecules of oxygen. If 1.0 g of hemoglobin…

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Q: 2.1 Preparing primary standard potassium acid phthalate (KHP) solution for standardizing the 0.1 M…

A: KHP and NaOH react with each other in a stoichiometric ratio of 1:1.

Q: Standardizing the 0.1 M HCI using standardized 0.1M sodium hydroxide solution No. of titration…

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Q: Laroka decided to titrate 30.0mL of 0.116 M HCI with 0.223 M NaOH. What is the volume (mL) of HCI…

A: Concept based on the acid-base titration.

Q: Minna wanted to recrystallize acetylsalicylic acid from aspirin. However, she found out that the…

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Q: The equilibrium constant, Ke for the reaction H₂(g) + CO₂(g) = H₂O(g) + CO(g) is 4.2. Initially 0.80…

A: Given Initial moles = 0.8 mol Volume = 5L

Q: . Show a reasonable mechanism for the following reaction. benzoic acid 1. NaOH 2. chloroethane ethyl…

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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.