A photon of wavelength 200 nm strikes the surface of a metal causing an electron to be ejected with kinetic energy of 4.3 x 10-19 J. What was the threshold frequency of the metal? 5.2 x 1015 Hz 74 x 1015 Hz 1,6 x 1012 Hz 8.5 x 1014 Hz 1.2 x 1013 Hz

Q: Predict the structure of the product for the following reaction. CI AIC13

A: Given,The reaction is:

Q: Write the systematic name of each organic molecule: O structure CH3-CH-C-OH CH3 CH3…

A: RULES for IUPAC nomenclature;  In first step , we identify functional group present. we make longest…

Q: What are the products of the following reaction? CHO 1. NaCN /HCI -OH -OH CH₂OH н- I I H III CHO -OH…

A: The Kiliani–Fischer synthesis lengthens an aldose sugar carbon chain (four carbon to five carbon) by…

Q: 1. Provide the product for each of the following reactions. a. b. С. d. Н.С. О H3C H3C CH3 Н3С CH3…

A: Given are organic reactions.Reaction a and d has aldehyde reactant. Reaction b and C has ketone…

Q: ♥ Draw Lewis structures for each of the following. Give the total number of valence electrons,…

A:

Q: phosgene is produced in the reaction of carbon monoxide with chlorine gas: CO +Cl2 -> COCl2, what is…

A:

Q: Analysis of an organic compound found there to be 0.326 mol of C, 0.978 mole of H, and 0.163 mole of…

A:

Q: Ok, so a "student" was asked a question about the Wittig reaction. They needed to combine…

A: In the reaction between stabilized ylide and carbonyl compound, the major product is Z-alkene. But…

Q: Write complete, balanced equations for each of the following decomposition reactions. Include…

A: Zinc carbonate-ZnCO3, Zinc oxide-ZnO, Carbon dioxide-CO2Hydrogen peroxide-H2O2, Water-H2O,…

Q: Calculate AS values for the following reactions by using tabulated Sº values from Appendix C. (a)…

A:

Q: Predict the Product. Predict the major organic product(s) or reactant(s) for the following…

A: To predict the major organic product(s) or reactant(s) for the following reactions:

Q: What is the mass percentage of O in C₂H6O₂?

A: C = 12, H = 1, O = 16

Q: An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown…

A:

Q: Label the following compound as R or S. R isomer S isomer HO I 애

A: Given is organic compound. We assign R and S configuration to molecule according to…

Q: Write the systematic name of each organic molecule: structure CI пове НО CI НО НО ОН ОН name D D

A: In case of more than one functional group in organic compound, the functional group which will add…

Q: 8.) AHvap is a way to measure intermolecular forces quantitatively. Calculate the amount of energy…

A:

Q: Q5. Complete the following reactions C6H5, H H C=C R See slide 12 on ether and iepoxide H3C See…

A: As per the rules, only the first three questions can be answered

Q: For the group of four atoms or ions provided below, please select the species that are isoelectronic…

A: Isoelectronic are species that have the same number of electrons.A neutral species has the same…

Q: Complete the following chart, in order from left to right Ion 40Ca2+ Mass Number Protons Neutrons…

A: Given,             Ion  Mass number    Protons   Neutrons   Electrons            40

Q: When a hot object is placed in a water bath whose temperature is 25°C, it cools from 100°C to 50°C…

A: To determine the temperature of the second bath, we can apply Newton's Law of Cooling, a principle…

Q: 7. Propose an arrow pushing mechanism that explains formation of product B. H₂O, H A OH 잇 HO. B lian

A: This reaction is the addition reaction of alkene.In the first step, presence of acid protonation…

Q: How many grams of phosphorus (P4) are needed to completely consume 44.2 L of chlorine gas according…

A:

Q: Draw a skeletal ("line") structure of this molecule: CH3 CH-CH3 O CH₂-C- CH—CH,CCH3 Click and drag…

A: We have to draw the skeletal structure of the given compound.

Q: Which of the following isomeric dibromopropanes has only a single peak in its proton NMR spectrum? O…

A: The question is based on the concept of hNMR spectroscopy.We need to identify the compound that…

Q: . In which of the examples is the entropy definitely increasing? making a house of playing cards…

A: Entropy is measure of randomness or disorder in system.Generally entropy increases with increasing…

Q: The C-O-C bond angle in dimethyl ether is closest to O 109⁰ O 120°. O 90°. O 180⁰.

A: Steric number = number of lone pair of electrons on the central atom + number of bonds pair to the…

Q: Draw the structure of methyl butanoate.

A: The structure of an organic compound is described in the following steps:Determine the number of…

Q: Draw Sn1/E1 products of both reactions below or fill in the blank with appropriate stuffs for Sn1/E1

A: In both SN1 and E1 reactions, the first step is formation of stable tertiary carbocation. If the…

Q: Problem 2: According to the Cahn-Ingold-Prelog rules which group has the highest priority in each of…

A: Given are organic groups.According to Cahn-Ingold-Prelog rules priority is assigned with respect to…

Q: 7. Which Newman projection represents the least stable conformation for cis-1-t-butyl-2-…

A: Stability of the cyclohexane conformations depend on the position of the substituents. The larger…

Q: Suppose a 50. L reaction vessel is filled with 1.3 mol of NO₂. What can you say about the…

A: The given equilibrium reaction is NO3(g) + NO (g)  2NO2(g)Given data

Q: Classify the following redox reaction: 2H₂O₂ 2H₂O + O₂ Select the single best answer. O…

A: Information of question

Q: Provide the correct systematic name for the compound shown here. ОН

A: The IUPAC nomenclature rules for the cycloalkane: Identify the longest continuous carbon…

Q: The H2/CO ratio in mixtures of carbon monoxide and hydrogen (called synthesis gas) is increased by…

A:

Q: Use average bond enthalpies from the table to estimate AH for the following gas-phase reaction of…

A:

Q: Dolomite has a very similar structure in which Mg substitutes for Ca in alternating layers. Assume…

A: In crystal structures, the elements with similar charges and sizes can replace one another. This…

Q: Name the compound below using IUPAC nomenclature. Geometric isomerism can be ignored; do not provide…

A:

Q: If 2.12 moles of chlorine produce 1.22 moles of FeCl3, what is the percent yield of the reaction?…

A:

Q: Arrange the oxides B2O3, Al2O3, BaO, CO2, Cl2O7, SO3 in order from the most acidic through…

A: In the periodic table in periods the electronegativity increased from left to right.In groups the…

Q: For the following equilibrium reaction, 2AB+C if equilibrium concentrations are [A] = 0.66 M, [B] =…

A: Consider the given equilibrium equation as;Equilibrium constant c for a reaction is defined as the…

Q: = RGANIC FUNCTIONAL GROUPS Naming and drawing unsubstituted esters Write the systematic name of each…

A: Esters:General formula: R-COOR' where R = H or any alkyl group while group R' is always an alkyl…

Q: Can the target compound at right be efficiently synthesized from the starting material at left? Br…

A: The question is based on the concept of organic synthesis. We need to synthesize the product using…

Q: What is the name of the enzyme catalysing reaction 2? a) 3-hydroxyacyl-ACP dehydratase b) 3-keto…

A: Given is concept map of fatty acid anabolism.Given map involves  three reactions.

Q: This has got to be one of the worst explanations. No following at all, tried it on a problem 4…

A: Given thermochemical  reactions are :(1). MgS (s)  Mg(s) + S(s) ΔH1 = + 598.0 kJ(2). SO2(g) S(s) +…

Q: Naming aldehydes and acids Name these organic compounds: structure 0 HIC-OH O CH₂-C-H O CH₂-CH₂-C-OH…

A: Suffix for Carboxylic acid = -oic acidSuffix for aldehyde = -al

Q: Which of the following structures do all atoms have full octets A. C. Br CH₂ B. OH o Ⓒ A. D. O NH₂…

A: Given are charged organic molecules.In simple words, Full octet means atom has 8 electrons around it…

Q: ↑ d. H₂O LED Na, NH3 -78°C + Tt O B 2 Ⓒ

A: Alkynes show characteristic addition reactions. As alkynes contain the triple bond hence it shows…

Q: What mass of Cr2S3 would contain 1.0x10^24 sulfur atoms?

A: The number of sulfur atoms in the given sample of Cr2S3 = the mass of Cr2S3 that contains  is

Q: Silicone is made of quartz. true or false

A: A synthetic polymer made up of the elements silicon, oxygen, carbon, and hydrogen atoms. The basic…

Q: Find AS of the reaction. Report the value with the appropriate sign. Be sure your answer has the…

A: Given,The reaction:3 NO2 (g)O (l)  2 HNO3 (l) + NO (g)

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.