When burned, a sample of an unknown substance is found to emit light of frequency 7.41×1014s−17.41×1014s−1. Which of these elements is probably in the sample

Q: Which element is reduced in the reaction below? Fe2+ + H+ + Cr₂O72- → Fe3+ + Cr3+ + H₂O -> O Fe O OH…

A: Oxidation reduction reaction (Redox reaction) It can be defined as the chemical reaction in which…

Q: What is the correct volume reading in the volumetric burette below? Type your answer without units.…

A: Volume reading in a volumetric burette : The correct volume of a liquid in a volumetric burette is…

Q: The length, width, and height of a large, custom-made shipping crate are 1.22 m, 3.22 m, and 0.83 m,…

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Q: At elevated temperatures, molecular hydrogen and molecular bromine react to partially form hydrogen…

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Q: Convert the following measurement. 7.34 × 10 2 -6 kg-m 2 || g*cm

A: 1 kg = 1000 g and  1 m = 100 cm

Q: 5.) The blood velocity in aorta can be measured directly using ultrasound. The graph below shows the…

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Q: How fast must an electron travel (in meters per second) to have the same wavelength as the diameter…

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Q: a) Is ring B a D- or an L-sugar? How do you know based on the Haworth structure of ring B below? b)…

A: To identify whether the ring B present in the given molecule is an D sugar or a L -sugar.  The…

Q: How many fused rings are there in steriod?

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Q: For each of the following compounds, provide: a. Molecular Formula and molecular mass (for halides,…

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Q: Identify the atomic orbitals in the N-O sigma bond in the following oxime: H₂C IN 11 H

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Q: Match the following Contains the antigen binding site Contains carbohydrate moiety Hinge region…

A: •These given terms are related to antibody structure which present in body. •Antibodies are…

Q: A horizontal piston/cylinder arrangement is placed in a constant-temperature bath. The piston slides…

A: Given the data, we have, external pressure is 14 bar. 1 bar = 0.987 atm so, 14 bar is  =14×0.987…

Q: How does decreasing the total energy of the system affect the stability of the pair of atoms in the…

A: The detailed explanation is given below. After decreasing the total energy of the system the…

Q: The concentrations of reactants and products for a chemical reaction can be calculated if the…

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Q: 5 additional forms

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Q: beaker containing the sample was weighed using the analytical balance and obtained  a weight of…

A: Given -> Weight of (sample + beaker ) = 15.4 gm Weight of beaker = 9.4 gm

Q: 5. Solvolysis of bromomethylcyclopentane in methanol gives a complex product mixture of the…

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Q: What happens when NH3 solution is added to equilibria below ? Ca(OH)2 (s)  -> Ca+2 (aq) +  2OH-(aq)…

A: when NH4OH added to this equilibrium system, Ca(OH)2 (s)  becomes less soluble because of common ion…

Q: 1. Label the required items on the molecule shown (4) SH NH₂ (a) circle 4 carbon ATOMS which use sp³…

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Q: The energy required to remove electrons from elemental cesium is 376 kJ/mol. What is the threshold…

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Q: 2 3 4 6 7 8 100 QUESTION 4 How much sample should be loaded into the capillary tube for a Melting…

A: 4) We have to answer how  much sample should be loaded into the capillary tube for a Melting Range…

Q: How many non-equivalent ("different" kinds of) protons are there in this compound? H3C CH3 Br

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Q: The concentration of H+ ions in a bottle of table wine was 3.7 x 10^(-4) M right after the cork was…

A: pH of a solution is defined as the negative logarithm of H+ ion concentration. pOH of a solution is…

Q: The combustion of methane produces carbon dioxide and water. This occurs in biogas plants. If 100…

A: The balance chemical reaction for the reaction between methane and oxygen is, CH4+ 2O2 →CO2 + 2H2O…

Q: You will convert the candle volume from cubic inches to milliliters given a conversion factor…

A: Concept based on the conversion factor.

Q: Assume that your brass sample is pure copper and has a mass of 1.00 gram. Determine t concentrated…

A: Solution: We know when any metal is treated with mineral acid the corresponding metal salt will be…

Q: The absorption spectrum of the complex ion [Co(NH3)6]3+ has strongly absorbs blue light at a…

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Q: Can you help me to write the label of the units for the moles, molar mass, molecules, and grams?

A: There are several units for measuring different particles and objects. Gram units are used for…

Q: The complex ion [PdCl4]2- is known to repel a magnetic field. Use this information to determine if…

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Q: rch what elements are typically found in brass. y of these form colored solutions? Do any absorb

A: Coloured solutions are those which are paramanatic in nature. Colourless solutions are those which…

Q: What is the pH of a solution made by adding 0.075 mole of NaOH to 2.0 L of distilled water. Assume…

A: Given, moles of NaOH = 0.075 mole  Volume = 2.0 L

Q: Demonstrate that the wavefunctions for the particle-on-a-ring problem show no preferred position on…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 5. Compute the following (Show your complete computation. Box your final answer):  A dose of…

A: Given : Total dose of digoxin = 1.0 mg  And concentration of digoxin solution = 50 mcg/mL

Q: The wavelength for the color indigo is 445 nanometers (nm). What is this wavelength in kilometers…

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Q: 12.70a1 HO X₁ 1) Excess MeMgBr HO. 2) H₂O* OH Add curved arrow(s) to complete step 1 of the…

A: Grignard reagent (RMgX) undergoes nucleophilic addition reaction to carbonyl compounds. It reduces…

Q: What mass of water is produced from the complete combustion of 6.80×10−3 gg of methane? Express your…

A: Given, mass of methane (CH4) reacts = 6.80 × 10-3 g mass of water (H2O) produced = ? g Note: Molar…

Q: Complete the IUPAC Name of the structure.

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Q: Pre-Laboratory Schematic Diagram: Please create a schematic diagram of Constant Pressure…

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Q: Chemistry Draw the correct structural formula of the organic product/s formed by the reaction of…

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

Q: Balance the following by redox reaction: Indicate the reducing agent and the oxidizing agent. Fe+2…

A: Balancing of redox reaction means the number of individual atoms in the product side must be equal…

Q: CH3. Draw a Lewis structure for the molecule below, showing all lone pairs. You may abbreviate any…

A: Given -> Compound : CH3CH2COCH2OH

Q: Examine the molecule below. Check the box next to each functional group the molecule contains. In…

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Q: Design a synthesis for each of the following target compounds, starting from the starting…

A: To get the target molecule we need the following reactions 1. Oxidation of alcohol to carbonyl…

Q: Drag and drop the product of the following fatty acid reaction. HO CHÍNH,/H* 1

A: The given fatty acid contains —COOH group which react with primary amine (CH3NH2) in presence of…

Q: Calculate the pH of a solution prepared by adding 35.0 mL of 0.050 M HBr to 160.0 mL of 0.10 M HI.…

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Q: Exercise: Explain how can you name the following heterocycles. S Br, S

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Q: A 47.8-mg sample of boron reacts with oxygen to form 154 mg of the compound boron oxide. What is the…

A: Given, Mass of boron (B) = 47.8 mg = 0.0478 g Mass of boron oxide formed = 154 mg = 0.154 g…

Q: You have 0.100 M solutions of acetic acid (pK₁ = 4.76) and sodium acetate. If you wanted to prepare…

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Q: Which of the following is the correct balanced half equation for the oxidation reaction in the…

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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.