how uv-vis work?

Q: Describe the preparation of the solution. Show pertinent calculations. 1.) 50 mL of 0.5 N HCl from ...

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Q: Hydrogen and carbon dioxide gases react at a high temperature to give water and carbon monoxide: H2(...

A: Let us discuss the concept and formula of equilibrium constant.

Q: In reverse phase chromatography, the stationary phase is ___________ and the mobile phase is _______...

A: Answer of the question given below, 

Q: 1. Explain why the behavior of H2 (positive deviation) is different from the behavior of CH4 and NH3...

A: Given graph is :  And   

Q: Click on the scheme on a functional group that may react with benzaldehyde: COOH H2N Selected Coordi...

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Q: [2] Write a chemical equation for an equilibrium system that would lead to the following expressions...

A: Answer - (a) According to the question - The equilibrium constant( K ) expression as follows - The ...

Q: Write possible term symbols and determine the lowest in energy terms of the following third row atom...

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Q: 5. A conductivity cell filled with 0.10 demal KCI solution gives at 25°C a resistance of 910 ohms. W...

A: Given :-  Resistance with 0.10 demal KCl solution = 910 ohms Specific conductance of unknown solutio...

Q: a what is U List of P Q suffix for PB Prefixes Q What is Q cabrini p Cabrini Porti O Mail - K O Laun...

A: Chemical equilibrium is defined as the stage at which both reactant and product are in equilibrium.

Q: Be sure to answer all parts. A modern penny weighs 2.4800 g but contains only 0.0600 g of copper (Cu...

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Q: The following Rf values were computed from a normal phase chromatography experiment. Arrange them fr...

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Q: Retention time Substance(s) Peak area (%) (min) Crude product Pure product 8.725 1,2-cyclohexanediol...

A: In the analysis of gas chromatography, the evaluation of peak area is one of the most important aspe...

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 349. kJ during a ...

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Q: What type(s) of intermolecular forces are expected between CH3CH2CHO molecules? H H- Indicate with a...

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Q: For items 11-15, Draw the structures of the missing products in the given reactions. CH2Br NaNH2 CH,...

A: NaNH2 ==> Acidic proton abstraction Lindlar's catalyst ===> Alkyne to cis alkene HBr ===> M...

Q: 38. Use of cobalt glass in the test for potassium ion

A: As per bartleby guidelines I answered only first question so please don't mind thanks in advance.   

Q: student mixed 5.00 g (0.0594 mol) of solid cyclohexane, C6H12, (84.18 g mol–1) at its melting temper...

A: Number of moles = 0.0594 moles

Q: 4. When a 19.34 gram piece of lithium is placed in a sample of water, how many grams of hydrogen gas...

A: given  Li = 19.34 g molar mass of lithium = 6.94 g mol-1 molar mass of hydrogen gas = 2.016 g/mole m...

Q: The metals industry was a major source of air pollution years ago. One common process involved "roas...

A: Given the reaction is, 2PbS+3O2---->2PbO+2SO2 Mole of PbS is 9.53mol. We have to calculate mole o...

Q: Determine: 2 Fe203(s) + 3 C(s) → 3 CO2(g) + 4 Fe(s) Given Enthalpy (K/mol) 3 -833.8 O2(g) Fe203(s) 2...

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Q: DIRECTIONS: Read and analyze each question then choose the letter of the correct answer. Write the  ...

A: Vapour pressure is the pressure of vapours on the surface of liquid when they are in equilibrium sta...

Q: Mark each statement as True (T) or False (F). i) CO belongs to the binary ionic compounds. ii) React...

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Q: Carbon decays exponentially. How many grams of the carbon will be left in 104 years, if 107 grams we...

A: Carbon decays exponentially. We have to calculate how many grams of the carbon will be left in 104 y...

Q: 6. .... =mole/L. a) Mole fraction b) Molarity c) % Yield d) Normality

A: We are given : UNIT = mol/L We have to find the quantity that have unit of mol/L.  

Q: a. Name the following compounds according to systematic and common nomenclature. N- HO EtO2C NH Br 1...

A: A question based on nomenclature of organic compounds that is to be accomplished.

Q: A pneumatic jack is used to raise a car 46.00 cm. The volume of the pneumatic "balloon" is 510 L at ...

A: Given :-  Initial volume = 510 L  Initial temperature = 31°C  Final temperature = 18°C  To calculate...

Q: 7:31 What effect would you expect the following changes to have on the SN2 reaction of CH3Br and CN-...

A: Nucleophilic substitution bimolecular SN2 reaction is first order with respect to each of the two re...

Q: The equilibrium constant for the reaction: CO2(g) 2 CO(g) + 1/2 O2(g) is 6.66 × 1012 at 1000 K. Calc...

A: Given-> CO2(g) --> CO(g) + 1/2O2(g).      K1= 6.66 × 10^12 I think there is 10^12 not 1012.   ...

Q: The list below provides common observe. Some are scientifically true while others are misconceptions...

A: Here we have to predict the change in property (boiling point, freezing point volatility)  in the gi...

Q: Potassium hydrogen phthalate, KHP, is often used as a primary standard for the standardization of so...

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Q: hypothetical metal with an atomic radius of 0.171 nm has an orthorhombic unit cell for which the a, ...

A: Atomic Radius of metal = 0.171 nm

Q: If the molecule or polyatomic ion is polar, write the chemical symbol of the atom closest to the neg...

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Q: The following chemical reaction takes place in aqueous solution: SnCl,(aq)+K,S(aq) SnS(s)+2 KCl(aq) ...

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Q: Using gravimetry analysis, explain in 3-4 how is the process of testing the purity of the squash sou...

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Q: What fraction of iminodiacetic acid is in each of its four forms (H, A H,A, HA, A) at pH 3.357? The ...

A: pH=3.35=-log [H+]or, [H+]=10-3.35=4.47×10-4

Q: Question 8. How can you use absorption spectra of dye standards to identify the dye(s) present in a ...

A: Each and every dye has specific absorption maxima (λ max ). It is nothing but the wavelength at whic...

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them 1 atm pr...

A: When work is done on a system, a positive sign is assigned. When work is done by the system, a negat...

Q: how aas work?

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

Q: Which of the properties below apply to the polymer that forms when the following monomers react? H H...

A:   Monomers which have double or triple bond are react with each other by addition reaction without l...

Q: )A 315.5 g of sodium chloride is dissolved in 900 g of water at 25 degree Celsius. Find: a. Final va...

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Q: 5. Tropone (A) is much stronger base (conjugate acid more stabilized) than the open chain, conjugate...

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Q: Determine the molar solubility of PbSO4 in pure water. Ksp (PbSO4) = 1.82 × 108. a. 1.82 x 10-8 M b....

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Q: Given the following data, prove that the distribution of benzoic acid in water and benzene follow th...

A: The total number of moles/mass of benzoic acid is not given to calculate the extracted number of mol...

Q: What is Kb for the equilibrium rreacton:  CN- + H2O  HCN + OH- ?     Ka value of 6.23 x10-10

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Q: 5. Empirical formula for C4Hsl4N2 Is. a) CH2IN b) C2H42N c) C2H2LN2 d) none of all

A: Empirical formula is the simplest whole number ratio of atoms present in a compound. Where as the mo...

Q: molecule or polyatomic ion polar or nonpolar? atom closest to negative side polar HBr nonpolar O pol...

A: Answer: All three compound are covalent compounds, therefore their polarity or non-polarity will dep...

Q: e average rate of dis

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Q: Give the condensed formula of the following alkane. Ex: CH3CH(CH3)CH2CH2CH(CH3)2 1. 2,3-Dimethylpent...

A: The condensed formula is one of the ways to express the structural formula of organic compounds. To ...

Q: Na2Cr207 () CH2-CH2-OH H2SO4

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Q: Make a schematic diagram for the procedure below: B. % SO3 determination Dry the soluble sulfate s...

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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.