H2. A system contains 20 atoms, each of which can only have zero or one quanta of energy. How many ways can you arrange 10 quanta of energy in this system?

Q: Compound 41 is a colourless liquid with the chemical formula: C6H₁4O. Using this information, as…

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Q: Question 8.a of 10 A 432.1 gram sample of an unknown substance (MM = 92.41 g/mol) is heated from…

A: Given :  Mass of sample = 432.1 gm  Molar mass of sample = 92.41 g/mol  Initial temperature = -23.1…

Q: A 500 l-mL solution of acetic acid contains 65mL of pure acetic acid. Find the present concentration…

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Q: Calculation What is the concentration of hydroxide ion in a solution with a pH of 3.767?

A: Formula ;                                                        pH + pOH = 14  Given pH =3.767. pOH…

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

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Q: 5. To what temperature must a gas sample at 20°C be heated in order to double its volume?

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Q: Which of these molecules and ions do not contain polar bonds? TeCl4 CIF5 XeF2 PH2 PCl3

A: we have to select the molecule which does not have polar bonds

Q: Write the formula of an alkane containing 16 carbon atoms. Answer:

A: We have to write the formula for alkane that has total 16 carbon atoms

Q: An analyst determines the Cl^- content of rain water with ion chromatography. The data for the…

A: There is a high probability that an analytical instrument will produce a signal noise whenever a…

Q: The ionic radii of the Mg21 and 022 ions are 0.86 Å and 1.26 Å, respectively. Given that the…

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Q: How much volume (in Liters) is required to neutralize 126 mL of 0.55M H3PO4 if we use a 3M Ca(OH)2…

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Q: Provide the correct IUPAC name for the compound shown here. OH 5- Question 9 of 20 3- 5,5- 1-…

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Q: Experiment 2. Impact of dilution on pH 1. For each of the 5 solutions in experiment 1, you are going…

A: When we make 10X dilution, the [H3O+] concentration of the diluted solution decreases by 10 times.…

Q: Which of the following is NOT a chain isomer of n-hexane? O a. 3-methylpentane O b.…

A: Chain isomers are molecules having the same molecular formula but differ in the arrangement of…

Q: Synthesize each compound from acetylene. You may use any other organic or inorganic reagents. 1.…

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Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: A question based on mole concept that is to be accomplished.

Q: A chemist must prepare 500.0 mL of sodium hydroxide solution with a pH of 12.30 at 25 °C. He will do…

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Q: Find ∆Stotal (entropy change) when 100 grams of water vapor initially at 200 degrees Celsius…

A: ∆Stotal (entropy change) when 100 grams of water vapor initially at 200 degrees Celsius undergoes a…

Q: OH SN 2 A. PBV3 B. H₂SO4 SN 2 C. H- Br, SHI D. H-Br, SN 2 > Br

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Q: You have a mixture of oxalic acid, H₂C2O4, and another solid that does not react with sodium…

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Q: 7. An ionic bond is formed between a cation A+ and anion B. How would the energy of the ionic bond…

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Q: If you have the same amount of the following alkanes in a closed flask, which one will saturate the…

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Q: Hydrazine, N₂ H4, a base like ammonia, can react with sulfuric acid. 2- 2 N₂ H₁ (aq) + H₂SO4 (aq) →…

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Q: 4.21 Ethylene has D2h symmetry. a. List all the symmetry operations of ethylene. b. Write a…

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Q: Calculate the pK at 25 degrees C of the following reaction using the data in the table. Use R =…

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Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A: A bond cleavage can be of two types : Heterolytic cleavage : The bond cleavage in which one atom…

Q: Which of the following statements incorrect? correct about primitive cell There is only one way of…

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Q: How many enantiomers are there in the molecule shown below?

A: The solution is given below -

Q: Write the equilibrium expression for the following reaction…

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Q: The rate constant for the decomposition of gaseous azomethane, C₂ H6 N₂ (g) N₂ (g) + C₂ H6 (g) Is…

A: k = 40.8 min-1 t = 0.0500 min   Mass of Azomethane = 2.00 g

Q: At 1125 K, ∆G° = 43.2 kJ/mol for the reaction 3 A (g) + B (g) → 2 C (g). If the partial pressures of…

A: We have to calculate free energy for the reaction  3 A (g) + B (g) → 2 C (g)

Q: A solution is prepared by dissolving 1.40 g of silver sulfate in 100 mL of hot water. Will a…

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Q: Which of the following species can act as a Lewis acid? D A B OBF4 (A) None of these i (B) CH3 (C)…

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Q: the References to access important values if needed for this question. For the decomposition of…

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Q: How many moles are there in 138.16 g of Hexane (C6H14)? 0.36 1.61 2.76 0.62

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Q: ▶ Part A Part B Interactive 3D display mode CH3 CH3 H₂C 2-methyl butane C Submit C Spell out the…

A: For IUPAC naming following steps are required -> First of all identify the longest carbon chain.…

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

A: Radicals are species that have unpaired electrons. Unpaired electron means an electron that isn't…

Q: Potassium perchlorate is prepared by the following sequence of reactions: Cl₂ (g) + 2 KOH(aq) →…

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Q: Write the expression for the solubility product constant for PbI2…

A: #1: PbI2 is an ionic salt that is sparingly soluble in water.

Q: -C=C H H₂ (excess) Pd/C HgSO4, H₂O H₂SO4 i. BH3/THF ii. NaOH, H₂O₂, H₂O

A: Answer : A)       The terminal alkynes produce a ketone under these conditions.

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

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Q: •want top Procedure: Caution: do not change the order of addition given here. x15 Using a graduated…

A: SN1:  SN1stands for substitution nucleophilic unimolecular. SN1 reactions occurs by formation of…

Q: Provide the correct IUPAC name for the compound shown here. O 3- 4- 8- 7- 1- 2- tert- di sec- iso…

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Q: OTTO g w many moles of sugar (C6H ess for solving this problem,

A: Mole is a standard unit for measuring large quantities of very small entities such as molecules,…

Q: НО. ОН

A: Hybridization of following  carbon and functionality is given as .

Q: Which of the following is a valid IUPAC name for an alkyne? A) 1,3-dimethyl-3-hexyne B)…

A: Find out valid IUPAC of alkyne

Q: Quine the Alowable & Combinationes af quantum numbered for each the following electrons (9) a 2p…

A: Note: As per our guidelines we are supposed to answer only one question.Please post the second…

Q: 70. Consider the following. Need correct answer with explanation and why other options are incorrect…

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Q: Consider the titration Ba(OH)2 (aq) 1 2 HNO3 (aq) ➝ Ba(NO3)2 (aq) 1 2 H2O (l). The equivalence point…

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Q: Avogadro's Law relates which two variables? A. pressure and temperature B. moles and volume C.…

A: According to avogadro law under the same condition of temperature and pressure equal volume of…

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.