Given the following data construct a Born-Haber cycle for and calculate the lattice energy of PbS. 1. Pb (g) = Pb2 (g) + 2é Pb (s) = Pb (g) S (s) = S (g) S (g) + 2é = S (g) Pb (s) + S (s) = PbS (s) H= -98 kJ mol H = 2160 kJ mol H= 178 kJ mol H = 264 kJ mol H= -246 kJ mol

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Q: A mixture of hydrogen and 4.+1. 2HI

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Q: 9 4 6. 4Be + 2He→ O a. 1 On O b. 2 1H O c. 0 O d. 0 1H le 12 6C+.

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Q: NO2 F OH Na high dilution (?)

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Q: 02

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Q: Me Et Ме Me' Cl2 CH:OH

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Q: If you start with 135 mg of acetone, what mass of NaBH4 in mg do you need? To account for some of…

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Q: Submit Part C Dilution as a procedure in analysis We sometimes purposely dilute solutions if the…

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Q: 1 CI 2 F 3 ||| 4 5

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Q: A laboratory procedure calls for making 510.0 mL of a 1.2 M KNO3 solution. Part A How much KNO3 in…

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Q: What is the connection of the manhanttan project and chemistry?

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Q: The patient shows a serum level of cholesterol of 253 mg/dl (MWT = 386 g/mol), express this level in…

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Q: remove stains. The H₂O2 in the product can be titrated with the MnO4 under acidic conditions by the…

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Q: two solvents A (d=0.859 g/mL) and B (d = 1.290 g/mL) are immiscible. When 12.0 mL of solution A is…

A: Density=1.0314g/ml

Q: AICI 3 CI (continued on back)

A: Step 1: Step 2: Step 3: Step 4:

Q: CI VEt AICI 3 ?

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Q: (iv) CI. COMMO (v) 2x (vi) CI OMe NaOMe NaOMe Jogos NH3 HⓇ (cat.) J (C5H8O4) K

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Q: C. d. → CO2 + =- л ОН

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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.