There are four hydrogen atomic emission lines in the visible region of the electromagnetic spectrum. One of these emission lines has a wavelength of 486.1 nm. What is the frequency associated with a photon emitted with this wavelength?

Q: What would the structure look like for the following: (CH3)2CFCBr3

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Q: 6) Consider the below molecules. H H H H 6a) Which of the above molecules are amino acids? 6b) Which…

A: we need to identify which of the given molecules is/are amino acid(s)

Q: (Q77) The standard Gibbs free energy (AG°rxn) for the formation of sulfur trioxide from sulfur…

A:

Q: In self-contained breathing devices used by first responders, potassium superoxide KO2 reacts with…

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: In measuring the specific heat of water, which of the following statements is true?

A: Correct option is C.

Q: The value of AH for the reaction below is -482 kJ. Calculate the heat (kJ) released when 52.0 g of…

A: We can calculate the heat released by using stoichiometric calculation. We see from balanced…

Q: Palladium on carbon can reduce which of the following? Nitriles O Nitro groups Alkenes O Alkynes O…

A:

Q: Which of these molecules is stereogenic (optically active)? Remember meso compounds are not…

A: In case compounds 1,2 and 4 there are sigma plane of symmetry present along the diagonal .si there…

Q: When 163.7 g of aluminum chloride (M = 133.33 g/mol) decomposes under STP conditions, what volume of…

A:

Q: (Q73) If both the enthalpy change and the entropy change for a certain process have negative values,…

A: We know that ∆G=∆H-T∆S Where ∆G is gibbs energy. ∆H is enthalpy chnagr and ∆S is entropy change  For…

Q: Both physical and chemical changes are associated with changes in energy. Compare the energy changes…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: A 0.4755-g sample containing (NH,),C,O, and inert materials was dissolved in water and strongly…

A:

Q: For an electron in the 1s state of hydrogen, what is the probability of being in a spherical shell…

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Q: Lithium Oxide (Li2O) is a highly reactive chemical species which reacts to give electrons to other…

A: Lithium oxide (Li2O ) is highly reactive species.

Q: How many nuclei of Uranium-238 remain in a rock if the activity registers 464. decays per second?

A:

Q: 3) What mass (g) of potassium nitrate is needed to make 250 mL of 0,3 mole/L potassium nitrate…

A: Given - - > Volume = 250 ml = 0.25 L Molarity = 0.3 mol/L We know that, Molarity = mol of solute…

Q: Chemistry 3. Complete the following reaction scheme. Give all product(s) and indicate major or minor…

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Q: 4. Use the following reactions and AH° values given below to determine the heat of reaction for CH.…

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Q: Use the References to access important values if needed for this question. Consider the reaction:…

A: Given data :

Q: Design the following syntheses. OH Br

A: The synthesis can be carried out via Elimination reaction, followed by hydration reaction of alkene.…

Q: 1. What is the solution of lithium chloride in relation to the solution of aluminium chloride, if…

A: One formula unit of Lithium chloride ionizes in solution to form one Lithium and one chloride ion…

Q: Consider an electron confined to a 2-D ring of radius 0.8771 A. What wavelength of light is absorbed…

A:

Q: Questioh 4 Calcium carbonate breaks down into calcium oxide and carbon dioxide when heated. The…

A: given, calcium carbonate = calcium oxide + carbon dioxide   products have greater energy than…

Q: cream is sold in a 38-gram container. The average amount of cream used per application is 3- grams.…

A:

Q: Propose a synthesis for each of the compounds below from benzene. It will take 4 or 5 steps, be sure…

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Q: Acidic buffers consist of: O a. a weak acid and a salt, that formed from a weak acid and a strong…

A: Which one of the following is correct

Q: Write the systematic (IUPAC) names for the amines. The names should have the format alkanamine.…

A: We have to write the IUPAC names of the compounds.

Q: Determine the molar solubility for BaCOs (Ksp = 5.0 × 10-º) in a solution that already contains 1.4…

A: The solubility product of a sparingly soluble salt is called its Ksp.

Q: Calculate the heat absorbed when 68.8g of ice at -30 C is converted to steam at 160 C

A: The process has steps like  I. Heating of ice to 0oC II. Melting of ice at 0oC III. Heating of water…

Q: Phencyclidine is c17h25n a same suspected of being the illicit drug was formed to be 84.71 c 10.42h…

A: The molar mass of Phencyclidine, C17H25N is 243.387 g/mol

Q: Consider an ideal diatomic gas in a piston, at T = 22.7°C and atmospheric pressure (1.01 x 105 Pa)…

A:

Q: Question 45 This type of pump is used to move mobile phase through a CZE column: Reciprocating pumps…

A: Question 45:  This type of pump is used to move mobile phase through a CZE column: Answer is: None…

Q: Question #4 - Show how cyclobutane carboxylic acid can be prepared using the malonic ester…

A:

Q: 1) Write a balanced equation of following acid-base reaction (neutralization reaction) in water:…

A: The balanced acid base reaction is given below

Q: A 26.9 mL sample of 0.348 M ethylamine, C2H5NH2, is titrated with 0.391 M hydrobromic acid.…

A: The pH of a solution formed by the mixture of a weak base and its conjugate acid can be calculated…

Q: 4) In the lab you are extracting and enzyme called catalase from a potato and want to use this…

A: Enzymes are commonly help in speed up the reaction. Catalase is an enzyme that is found in almost…

Q: alue depends on .... O a. pKd and also on ratio of molar concentrations of salt and acid. O b. pKd…

A: pH of buffer solution is calculated by using Henderson Hassel balch equation

Q: Copper commonly occurs as the sulfide mineral CuS. The first step in extracting copper from CuS is…

A:

Q: What is the maximum mass of silver that can be obtained when 0.0202 g of hydrogen gas is bubbled…

A: Mass of Hydrogen = 0.0202 g Mass of silver nitrate = 2.81 g

Q: The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved…

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Q: write down adetaled mechanism CHOH 3 아

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Q: If a chemical reaction has AH°298 = -67.1 kJ and AS° = - .0908 kJ/K, what %3D is AG°298 (in kJ)? O…

A: In this a multiple questions, so I will solved first question for you in details solution and…

Q: 1. Draw the line-bond structures of 2(a) 9-anthraldehyde (b) trans- 9-(2-phenylethenyl) anthracene

A: We are authorised to solve only one question at a time. Please post rest of the questions…

Q: The pH of a saturated solution of Mg(OH)2 is 10.45. What is the pH of the solution after the…

A: Given-> pH of Mg(OH)2 = 10.45  Volume of HCl = 250.0 ml = 0.250 L (1L = 1000 ml) Molarity of HCl…

Q: 2 Propose a mechanism to account for the formation of this product. он H2SO4,Heat

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Q: D Question 34 8.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to…

A: The balance chemical reaction :  N2(g) + 3H2(g) ----> 2NH3(g)  Mass of nitrogen = 8.0 g  Mass of…

Q: Consider the coordination anion [Al(OH)6]-3 How many possible geometric isomers are there? a. Only…

A: Here the ligands is same. So there is not possible any geometrical isomer

Q: Please determine the ksp for  Cu(OH)2. pH for solution was 5.25  Show ice box for chemical…

A:

Q: Determine the molar solubility for Ag.CrO. (Ksp = 1.2 × 10-12). 3 NEXT Based on the given values,…

A:

Q: TRUE for non-metal elements? Non-metals do not conduct electricity well Non-metals are represented…

A: Yes non metals do not conduct the electricity well as because they do not have/posses free electrons…

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.