Visible light falls into wavelength ranges of 400-700 nm, for which 1 m = 1 x 10⁹ nm. The energy and wavelength of light are related by the equation E= hc 1 where E is energy in Joules, h is Planck's constant (6.626 x 10-34 J-s), c is the speed of light (2.998 × 108 m/s) and A is the wavelength in m. If a visible light photon has a wavelength of 588.1 nm, what is the energy of the photon (in J)?

Q: Rb-82 and In-111 are both neutron-deficient radionuclides. a) Calculate the transition energy for…

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Q: A 1.36g sample of magnesium nitrate, Mg(NO3)2 contains ____ mol of this compound

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Q: . 67 grams of NaOH (strong base, MM 40 g/mol) are reacted with an excess of HCL ( strong acid, MM…

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Q: 1-In the electrochemical cell formed Cu, Zn electrode given following concentration CuSO4= 0.01M,…

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Q: A 1.2 g vial of Tazicef says to add 10 mL of sterile water to reconstitute the powder. Assuming the…

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Q: Tryptophan Lysine Glutamic NH3+ Acid CH₂ SKI CH₂ CH₂ CH₂ CH₂ H CH, 0 ||…

A: We are given wih a  polypeptide structure at pH 7 and we have to tell the overall net charge of this…

Q: What amount (moles) is represented by each of these samples? 140.8 g  Fe2O3    =…

A: 1. mole of molecule  =Avogardous number of molecules  2. 1 mol of molecule  containes molecule equal…

Q: Write the Mass Balance Equations for the following solutions: 1) 0.10 F H2A

A: According to the law of mass balance the total mass of a system is always constant. Here H2A is…

Q: Where does the 9.751g come from?

A: Mass percent of an element in a compound is  = (  Mass of that element in compound / total mass of…

Q: Please answer this question as fast as you can please and tahnk you. I will afterwards write an…

A: The experimental density of a solution is -Trial 1 : 1.014 g/mLTrial 2 : 0.914 g/mLTrial 3 : 1.190…

Q: List all 4 possible stereoisomers and label each stereo center

A: We have given compound 2,3-pentane diol and we have to tell four stereoisomers of this compound and…

Q: The nonvolatile, nonelectrolyte sucrose, C12H22011 (342.3 g/mol), is soluble in water, H₂O.…

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Q: 3. consider the following addition reaction - two Possible Products and shown. will these foory in a…

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Q: Rank the following compounds in decreasing order of acidity. Br 1 A III > IV> || > | D OH Br B) II >…

A: Acidity order can be arranged based on the substituent in the compound.

Q: Write the safety precautions for each chemical Dry ice Chloroform-D Limonene

A: We have to write the safety precautions of  Dry ice  , Chloroform D and Limonene  Note: According to…

Q: 11. A copper ore consisting of 12.5% copper(II) sulfide, when heated and reacted with oxygen gas,…

A: Given data is copper(II) sulfide in th copper ore = 12.5%  when this is  heated and reacted with…

Q: Match the following aqueous solutions with the appropriate letter from the column on the right. A.…

A: Depression in freezing point is a colligative property which means that it depends only on the…

Q: 6. You prepare a 0.25 M solution of alanine at pH = 2.75. What are the concentrations of the species…

A: Given the molarity of alanine = 0.25 M pH of the solution = 2.75  Alanine is an amino acid without…

Q: According to the following reaction, how many moles of oxygen gas are necessary to form 0.944 moles…

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Q: What amount (mole) of C2H3Cl3O2 molecules are in 498.4 g chloral hydrates

A: Molecular formula of chloral hydrate = C2H3Cl3O2 Weight of C2H3Cl3O2 = 498.4 gram

Q: Write a complete, step-by-step mechanism for the reaction. 1. Sulfonation of benzene ON H 2. Free…

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Q: I really need to know how to get to the expression for DeltaU using "the full differential", rather…

A: Equation for internal energy change for Vander waals equation

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: 2-(carboxymethyl)- 2-hydroxybutanedi oic acid 2-carboxyethyl 2-iodobenzyl amine

A: In chemistry, the IUPAC naming system is a method of systemic naming of organic compounds as…

Q: student     carried     out     the     reaction     below     starting     with     1.993     g…

A: Initial amount of compound =1.993g Amount of CO2=0.593 g  X2CO3+2HCl ->2XCl +H2O+CO2

Q: This question requires that you work your answers on a scratch piece of paper. Once completed,…

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Q: What number of molecules (or formula units) are present in 7.38 g of each of the following…

A: Given Data: 7.38g of (NH4)2Cr2O7   Formula:  No. of molecules = No. of moles x Avogadro Number…

Q: chloral hydrate (C2H2Cl3O2) is a drug formerly used as a sedative and hypnotic. It is the compound…

A: We are to calculate the molar mass of chloral hydrate, C2H3Cl3O2 . Chloral hydrate is a drug used as…

Q: Determine the bond angle for H2CS Express your answer using three significant figures.

A: Steric number of H2CS is 3 so it is sp2 hybridized.  Steric number = number of Sigma bond + number…

Q: According to the following reaction, how many grams of potassium sulfate are required for the…

A: Given -> Barium chloride (aq) + potassium sulfate (aq) -> barium sulfate (s) + potassium…

Q: Determine the concentration of a solution with an absorbance of 0.3 at 300nm measured with a light…

A: A = Absorbance = E C L E =Molar absorption coefficient in M-1cm-1  C = Molar concentration in M L =…

Q: (Intermediate) Reactant 02CXORRAR 191 Apply Mechanism Hint Solution 8 remaining step(s) can be…

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Q: Draw the Fischer projection of methyl betal-d-mannopyranoside

A: We are asked to draw Fischer projection of methyl beta-d-mannopyranoside

Q: hich atom(s) are sp3 hybridized? 1A 1E HO 1B IZ 1D 1C -

A: The hybridization  is determined by adding total no of sigma bonds and lone pairs .

Q: Which of the following Newman projections accurately depict the compound shown?

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Q: Consider the reaction to isolate titantium metal from titanium(IV) chloride: 2 Mg(s)  +  TiCl4(l)…

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Q: Give a complete definition for each of the following enthalpy changes. In each case, please include…

A: Enthalpy change is defined as amount of heat absorbed or released by the process under constant…

Q: How many sulfure atoms are present in 3.0g of aluminum sulfate?

A: Each formula unit of aluminium sulfate has three sulfur atom.  Hence mole of sulfur is three times…

Q: Write a Lewis structure for each of the following molecules. H3COCH3 (oxygen is between the two…

A: we need to draw the Lewis structure of H3COCH3

Q: For each of the following chemical symbols, determine the number or element symbol that goes in the…

A: Given Total number of electrons in Barium = 54 Total number of neutrons = 81

Q: At normal pressure, what is the total amount of heat (q) in Joules that must be added to 42 grams of…

A: Here we are required to find the energy needed to heat water of mass 42 gm from 40°C to 148°C

Q: 11. How many stereoisomers are there of D-fructose (including D-fructose), shown below? CH₂OH :0 H…

A: If a molecule has "n" chiral carbon atoms then it will be 2n stereoisomers. In the given molecule…

Q: The nonvolatile, nonelectrolyte TNT (trinitrotoluene), C₂H5N306 (227.1 g/mol), is soluble in…

A: Given, The nonvolatile, nonelectrolyte TNT (trinitrotoluene),C7H5N3O6 (227.1g/mol) , is soluble in…

Q: en solutions of H₂SO4 and NaOH react, the balanced molecular equation is: H₂SO4(aq) + 2 NaOH(aq)…

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Q: 12. Write the balanced net ionic equations for the following reactions. a. AgNO, (aq) + NaCl (g) →…

A: First, we have to balance the molecular equation.  Then write the complete ionic equation by…

Q: All sugars exhibit mutarotation, or the interconversion of the α and β anomeric forms using the open…

A: To calculate we will use

Q: suppose a 0.030M aqueous solution of sulfuric acid (H2SO4) is prepared. Calculate the equilibirum…

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Q: for this question you need to work all of your answers on scrunch paper. Once completed upload an…

A: Average rate: The rate of the reaction over the complete experiment. Instantaneous rate: The rate of…

Q: What number of atoms of nitrogen are present in 7.13 g of each of the following? glycine: C2H5O2N…

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Q: Please answer this question as fast as you can please and tahnk you. I will afterwards write an…

A: To solve this problem we have to use significant figures rules .

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.