When a particular wavelength of light is shone on a metal with a binding energy of 3.62 × 10–19 J,  the kinetic energy of an ejected electrons is 5.60 × 10–19 J.  The wavelength of light used was  nm

Q: Microwave ovens operate at a frequency ν = 2450 MHz. What is the energy of one photon of microwave ...

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Q: For a gaseous reaction, standard conditions are 298 K and a partial pressure of I bar for all specie...

A: Relation between equilibrium constant and delta G.....

Q: 10) Assume that boron is used to dope silicon. If boron dopant concentration uniform and has a value...

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Q: The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expecte...

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Q: What mass of Ba(NO3)2 (261.34 g/mol) is needed to convert 2.33 g of NaIO3 (197.89 g/mol) to Ba(IO3)2...

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Q: What do you call the algebraic expressions that describe the concentration relationships that exist ...

A: An equilibrium-constant expression is an algebraic equation that describes the concentration relatio...

Q: Find [Cu+] in equilibrium with CuBr(s) and 0.10 M Br2.

A: Concentration of Br2 = 0.10M Ksp of CuBr = 5 × 10-9 

Q: Draw the major product of this reaction. Ignore inorganic byproducts. CN 1. LIAIH4 (excess) 2. H3O* ...

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Q: Would we expect to use the same volume of Ca(OH)2 as NaOH to titrate 0.4 M HCl. Explain.

A: We know that dissociation of HCl produces one hydrogen ion and one chloride ion.  HCl <==> H+ ...

Q: What particle is emitted when Cobalt-60 decays to nickel-60? A. neutron D. a-particle B. proton E. b...

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Q: 8. Draw a cooling curve for a sample of steam that cools from 110°C to -10°C. Indicate the segment o...

A: Answer: To cool the steam heat will be taken off from it and it will follow the cooling pattern like...

Q: At a certain temperature, the equilibrium constant K for the following reaction is 5.2 x 10': NO,(g)...

A: The equilibrium reaction given is,  

Q: How many moles of H2(g) are generated by the complete reaction of 0.145g of Mg(s) with excess HCl(aq...

A: The balanced reaction is ., Mg (s) + 2HCl (aq) ----> MgCl2 (s) + H2 (g)  

Q: Why should we do a standardization every time we do a titration?

A:  Standard solution is one of which we know the concentration . The necessity of standardization ever...

Q: Na2CO3(aq) + CaCl2(aq) – → 2 NaCl(aq) + CaCO3(s) Calculate the volume (in mL) of 0.100 M Na,CO3 need...

A: The balanced reaction taking place is given as, Given: Mass of CaCO3 produced = 1.00 g. And the con...

Q: Write equations for the half-reactions that occur at the anode and cathode for the electrolysis of e...

A: For the given electrolysis problem we have to write the reaction which occur at cathode and the reac...

Q: The Kb of C6H5NH3+ is 3.98x10-10 What is its Ka? What is the [H3O+] concentration in a solution tha...

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Q: If a 1.065 g sample of magnesium oxide of 84.736% were treated with 50 mL of 1.017 N sulfuric acid, ...

A:   A 1.065 g magnesium oxide sample of 84.736% purity is treated with 50 mL of 1.017 N sulfuric acid...

Q: Benzoic acid is a crystalline powder used as a food preservative. It contains 68.8% C, 5.00 % H, and...

A: Given : We have to calculate the empirical formula.

Q: Consider the following reaction: 2 ClF (g) → Cl2 (g) + F2 (g) Assume that an experiment is carried ...

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Q: What is the pH of a 7.7 x 10-3 M HI solution?

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Q: In order to form Ba(I03)2, 500 mL of 0.5000 M Ba(NO3)2 was mixed with 500 mL of 0.0500 M NalO3. • Ho...

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Q: Write the equilibrium constant expression for this reaction: H;PO,(aq) - 3 H (aq)+PO (aq)

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Q: AL(NO3), + KaSOs Alb (Sos),+ KNOJ 3

A: Al(NO3)3 + K2SO3 → Al2(SO3)3 + KNO3

Q: 3. Give the balanced equation which shows the decomposition reaction of solid aluminum chlorate [Al(...

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Q: The bond energies of Cl-Cl, C-C and C-H are 59 Kcal/mole, 90 Kcal/mole and 105 Kcal/mole respectivel...

A: The breaking of a bond requires the absorption of energy. The higher the stability of bond, the high...

Q: 18. What volume of a 0.200 M solution of nitric acid will be needed to completely dissolve and react...

A: Nitric acid react with Mg as follows- Mg+ 2HNO3 ➝ Mg(NO3)2 + H2

Q: The heaviest stable nucleus is an isotope of A. platinum. D. bismuth. B. gold. E. xenon. C. lead.

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Q: Suppose a 500. mL flask is filled with 2.0 mol of N, and 1.0 mol of NO. This reaction becomes possib...

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Q: A student needs to prepare a buffer solution with a pH of 5.20. Assuming a pKą of 4.52, how many mL ...

A: I have attached the detailed solution to the question below.

Q: When the kinetic energy is higher due to the decrease in temperature, the rate of reaction slows dow...

A: Collision theory of reaction rate: According to the collision theory of reaction rate, the randomly ...

Q: Give the chemical formula and name of the ionic compound composed of fluorine and lithium.

A: The ions given are lithium i.e. Li+ (formed by losing the only valence electron in Li) and fluorine ...

Q: What is the characteristic that distinguishes metals from one another?

A: The characteristics that distinguishes metals from one another is  malleability, ductility, Electric...

Q: Sodium stearate, a product of fatty acid and strong base, has the following structure. What forces o...

A: The detailed answer of the  given question is done on the white sheets of paper attached below.  Sod...

Q: 8. The reaction below represents the decomposition of a generic diatomic molecule in its standard st...

A: Given : We have to calculate the gibbs free energy for the given reaction.

Q: Identify the best reagents to complete the following reaction.

A:   Aldehyde functional group is -CHO , ketone functional group is RCOR  Aldehyde and ketone both  fu...

Q: Combining one atom of carbon with two atoms of oxygen produces one molecule of carbon dioxide, along...

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Q: Calculate the solubility at 25 °C of Co(OH), in pure water and in a 0.0180M CoCl, solution. You'll f...

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Q: Fluorine-18 decays to form a positron and oxygen-18. After 90.0 minutes, 1.00 18O is present relativ...

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Q: How many neutrons in Helium? He Answer: Check

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Q: Which chemical reaction below results in no change in the number of electrolytes present in the solu...

A: The substances which dissociate into ions (cations and anions) when they dissolve in polar solvent l...

Q: The flame test would NOT easily make a distinction between which two ions? O strontium and calcium i...

A: Since you have posted multiple questions, we are entitled to answer the first only. 12) The ion pair...

Q: For the following reaction, 10.3 grams of propane (C3Hg) are allowed to react with 21.3 grams of oxy...

A: Balanced reaction equation C3H8 + 5O2 ---- > 3CO2 + 4H2O Lets calculate the amount of the CO2 pro...

Q: 17. In the space provided below please draw (cis)1,3-dimethylcyclohexane in the most unstable chair ...

A: Concept:  1) most unstable conformation meaning that the molecule will have higher energy & this...

Q: What do you call substances that can both donate and accept a proton? A Ambivalent B Amphiprotic C) ...

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Q: А. OH В. NH2 С.

A:   Infrared spectroscopy (IR spectroscopy): IR is the spectroscopy which deals with the  the electro...

Q: What volume of 0.7777 M HNO3 is needed in order to produce 200 mL of 0.1550 M HNO3?   12.24 mL   1...

A: Given data - - > M1 = 0.7777 M V1 =? M2 = 0.1550 M V2 = 200 ml We know that from the formula M1V1...

Q: At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.034 s ...

A: Given that, a first-order kinetics reaction is  NH4OH (aq) →NH3(aq) + H2O (aq). The rate constant of...

Q: If a 1.065 g sample of magnesium oxide of 84.736% were treated with 50 mL of 1.017 N sulfuric acid, ...

A: Given: MgO is being titrated using sulfuric acid. Normality of titrant i.e. H2SO4 = 1.017 N  

Q: 3. Propose a possible synthetic pathway for the following reaction. multiple steps

A: Bromination is electrophilic aromatic substitution reaction where benzene ring acts as nucleophile. ...

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.