A wave of blue light has a frequency of 7.65x1014 s-1.  What is the energy of each light wave? Use h = 6.626x10-34 J•s.  Express your answer to three significant figures and in proper scientific notation.

Q: What is the pH of a 0.095 M C6H5CO2H M solution if the K, of C6 10-5? Your Answer: Answer

A: Given,  Concentration (C) = 0.0950 M Ka = 6.5 × 10-5 pKa = -log(6.5×10-5 )  = 4.19   

Q: How many grams of NaCl are needed to make 3.0 L of 1.5 M solution?

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as...

Q: A cylinder contains helium gas with a volume of 2.60L at 20°C and 768 mmHg. If the balloon ascends t...

A: Given:: V1=2.60 L P1=768 mmHg P2=614 mmHg V2= ?

Q: Write balanced half-reactions for the following redox reaction: NO,(aq)+ H,0(1)+Cu (aq) - NO,(g)+20H...

A:

Q: following statements below correctly describes isotopes?  a. They are of the same number of neutrons...

A: Atomic number = number of protons  Mass number = number of protons + number of neutrons

Q: please show a step by step mechanism R1 R21 82% yield (Ref: Taylor) (3cis) R1: OCOMe, R2: H (3trans)...

A: Solution: We know when haloforms treated with base (like NaOH) result in formation of carbene. Since...

Q: (c) Estimate the wavelength of electrons that have been accelerated from rest through a potential di...

A:

Q: Gaseous SO2Cl2 reacts with liquid water to form hydrogen chloride gas and liquid sulfuric acid. Usin...

A: Given: Gaseous SO2Cl2 reacts with liquid water to form hydrogen chloride gas and liquid sulfuric aci...

Q: Consider the following acidic e xO Chapter 13 Q's Flashcards | Qui x C Expert Q&A x b Search results...

A:

Q: Sodium lauryl sulfate has the same use in embalming fluids as  1-sodium phosphate 2-citrates 3-su...

A: Sulfonates

Q: (a) Give the mechanism for the following regioselective allylation reaction. Answer the question wit...

A: NH3/Li is responsible for transferring one electron to reactant. This can also be said as hydride do...

Q: Part A A soluton is prepared that has NI-130 M and (CI"-0.100 M. How many grams of AgNO, can be diss...

A: Solubility product is the minimum ionic product of concentration of constituent ions of a salt requi...

Q: Which one of the following sets of units is appropriate for a second-order rate constant? Multiple C...

A:

Q: 1. Br2, FeBrg 2. HNO3, H2SO4 3. Sn, HCI 4. NaOH, H2O 5. NaNO2, HCI 6. HBF4, A

A: The reaction given is,

Q: Propose a route for the synthesis of the given compound starting from benzene and using an organopal...

A:

Q: Be sure to answer all parts. At 430°C, the equilibrium constant (Kp) for the reaction 2NO(g) + O2(g)...

A: 2NO(g) + O2(g) ---> 2NO2(g) Kp = 1.5 × 105 Initial pressure of NO = 7.6 × 10-3 atm Initial pressu...

Q: Part A etal plating is done by passing current through a metal solution. or example, an item can bec...

A:

Q: A 6.934 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis ...

A:

Q: Ph H. + Ph2S + CH3 Ph predict relative stereochemistry (Hint: think about orbital alignment)

A: First step is nucleophilic addition of sulphur ylide in benzaldehyde...

Q: For the reaction: 2 A (g) + B (s) =2 C (s) + D (g) At 298 K in a 10.0 L vessel, the equilibrium valu...

A: Equilibrium constant is the ratio of product of concentration of products raised to their stoichiome...

Q: Injecting an arterial fluid which is hypertonic to the moisture level of the body will ___.     ad...

A: Hypertonic solution is one whose concentration of solute is more compared to another solution. so it...

Q: Iculate the solubility of Mg(OH)2 in 0.10 M NaOH. Calculate the solubility in ams/liter. 1gl0H)2.10M...

A: Given : Concentration of NaOH = 0.10M 

Q: NH2 CI а. b. С.

A: As the electron withdrawing power of group attached to carbonyl center increases partial positivity ...

Q: Draw condensed orbital diagram (showing elections) for Co. Co", Co. Label all orbitals and circle th...

A:

Q: cathode when coupled with a SHE in a galvanic cell. (Hint: What units are required Calculate the cel...

A:

Q: For each chemical reaction listed in the table below, decide whether the highlighted atom is being o...

A: Oxidation means loss of electrons and reduction means gain of electrons.

Q: A gas mixture, that has been formulated to simulate the atmosphere of another planet, contains: 320 ...

A: The atmosphere of another planet contains 320 mg methane, 175 mg argon and 225 mg nitrogen. The part...

Q: solution is prepared by dissolving 37.3 g of potassium chloride in distilled water. What is the volu...

A: A) Molarity (M) = 2.0M Mass = 37.3 g Molar mass of KCl = 74.6 g/mol Mole = mass/molar mass    = 37.3...

Q: 25 mL of a 0.0268 M solution of an unknown monoprotic acid was titrated with 0.0633 M NaOH solution....

A: Given: Volume of monoprotic acid (assuming HA) = 25 mL = 0.025 L                            (since 1...

Q: For each problem, state: a. Law being used  b. What was held constant or assumed to be constant  c. ...

A: Charles law states that at constant pressure (P) and fixed mass of gas ( n), the volume of the gas (...

Q: (c) Estimate the wavelength of electrons that have been accelerated from rest through a potential di...

A: In the given question we have to calculate the wavelength of electrons. 

Q: Calculate the change in entropy associated with the Haber process to produce ammonia from nitrogen a...

A: N2 (g)+3H2 (g)⇌2NH3(g) So(H2) = 130.6 J/mol K So(N2) = 191.50 J/mol K So(NH3) = 192.5 J/mol K

Q: 7.00x105 and AH° = 182 kJ/mol at 673 K. Consider the following system at equilibrium where K. NH4I (...

A: Le chateliers principle states that when a system under equilibrium is subjected to any kind of stre...

Q: .  Calculate the normality of NaOH solution formed by dissolving 0.2 gm NaOH to make 250 ml solution

A:

Q: a) 100 2-methyl-2-propanol 80- 40 20 0.0tt 10 20 30 40 50 60 70 80 m/z b) 100 n-propyl acetate 80 40...

A: Fragmentation of 2-methyl -2-propanol shows the elimination of small molecule OH , Methyl,  H2O and ...

Q: 2 Li oH H Ph 2) NaoH, CH, oH phc Chme: Adol- Tischeako reaction

A: Aldol Tischenko reaction is the reaction of aldehyde or ketone to form 1,3 hydroxyl compounds. In th...

Q: 1. How many moles of KNO3 are needed to make 450 ml of 1.5 molar solution?

A: Given- Volume = 450 ml = 0.450 L (1L = 1000ml) Molarity = 1.5 M  

Q: Draw the correct lewis structure for the following molecule. NC

A:

Q: Order the following atomic orbitals according to their relative energy levels in homodiatomic molecu...

A:

Q: Consider the following reaction: 2HI(g) H2(g) + I2(g) If 4.13 moles of HI(g), 0.646 moles of H2, and...

A:

Q: What is the principal quantum number (n), the orbital angular momentum quantum number (l), the magne...

A: There are 4 quantum numbers :  1) principal quantum number (n) 2) orbital angular momentum quantum n...

Q: CARBONYL CHOMISTRY - NUCLEO PHHL IC d- SUBSTITUTION NaocHy octy •octly 3) reflux Clue : Naoctty ects...

A: The reaction is a classic example of Favorskii rearrangement.  It is a rearrangement of alpha-halo k...

Q: Match the d orbital with its shape. (2) (3) (1) Orbital Selection dy d,2 - y2

A: The shape of the orbitals is determined by the contribution of the electron densities in the respect...

Q: What is the [Na2CO3] needed to mix with 0.2500 M H2CO3 to prepare 1.000 L of a carbonate buffer  wit...

A: Here we have given 0.2500 M of H2CO3 to prepare 1 L of a carbonate buffer solution with the desired ...

Q: For the central atom in each formula, draw the Lewis Structure with all valence electrons shown.  C...

A:

Q: What is the wavelength of electromagnetic radiation which has a frequency of 6.282 x 1014 s 1? O 4.7...

A:

Q: Protectim of C=0 TSOH benzene HO reglux TS OH =

A: In presence of acid diol can protect carbonyl group.  

Q: 2. During Amihan season, the crops in Benguet and other Northern Luzon provinces are prone to damage...

A: Two questions based on properties of liquids that are to be accomplished.

Q: For the following reaction between NH3 and CH3COOH, which one is the Bronsted-Lowry acid?

A:

Q: How many grams of AgNO 3 (molar mass = 169.87 g/mol) are needed to prepare 0.125M solution in 250 mL...

A: Given - Molarity = 0.125 M Molar mass = 169.87 gm.mole-1 Volume = 250 ml = 0.250 L (1L = 1000ml)  

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.