Q120) Which of the following i O All of these are forms of ionizing O X-rays O Gamma rays O Microwaves

Q: (SHOW CALCULATIONS) Calculate the AH°rxn for the reaction below. AH°f [SiO2(s)] = -910.9 kJ/mol;…

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Q: To measure the amount of chlorine in a well-boring fluid, an analytical chemist adds 0.5000M silver…

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Q: Describe the two main factors leading to sea-level rise, and relate them to the phase changes of…

A: There are various factors responsible for the rise in the sea-water level.  Below are the two main…

Q: (Q110) The first five steps of the decay of neptunium-237 are alpha, beta, alpha, alpha, beta decay.…

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Q: Mixture Components: . . (1) ArCOOH, benzoic acid (2) ArOH, 2-naphthol... (3) Arc1, p-dichlorobenzene…

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Q: Find the AHn for the following reaction: 2C(s) + H₂(g) → C₂H₂(g) given the following reactions and…

A: According to Hess's law change of enthalpy in a chemical reaction is same regardless of whether the…

Q: 2. A liter of 0.1 N potassium permanganate contains A 2.63 g B. 3.16 g C. 7.90 g D 15.80 g E. None…

A: Normality is described as the number of gram or mole equivalents of solute present in one litre of a…

Q: Question 7 You have been provided with a 38.6 mL sample of hydrochloric acid (HCI) of unknown…

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Q: Calculate the molar entropy of a constant-volume sample of argon at 270 K given that it is 154.84 J…

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Q: (Q116) The critical mass of uranium-235 is estimated to be 47.14960 kg. Which of the following…

A: Given  uranium-235 estimated to be 47.14960 kg

Q: A chemist fills a reaction vessel with 0.260 g calcium phosphate (Ca(PO4)₂) solid, 0.393 M calcium…

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Q: (27) What is the value of the equilibrium constant (Kea) when the following redox reaction takes…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost other question as…

Q: The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an…

A: Dear student ,   since you have posted multiple questions we will allow to solve only first question…

Q: Using the electron-pushing diagram shown, draw the product of the reaction, including nonbonding…

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Q: Mailings Review 3. a) Draw the following structures on a piece of paper, take a picture of them and…

A: The chemical structure represents the arrangement of atoms in the compounds.

Q: Hypochlorous acid (HClO) is a weak acid with pKa=9.21. For a 0.10 M aqueous solution of nitrous…

A: Given :  Concentration of HClO = 0.10 M  pKa = 9.21

Q: Explain with proper description with examples: a. disconnection b. sinton

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Q: Consider the following reaction: H2(g) + ½ O2 (g) ------>  H2O (g) The standard enthalpy of…

A: We can solve a given problem by using the Kirchhoff equation for enthalpy change It states that the…

Q: Draw the Lewis structure for the chlorine trifluoride (CIF3) molecule.

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Q: Across 1 Source of heparin. (3) 3 Physicochemical property of quinine. (5) 5 Important group in the…

A: Pig Glucose Basic Acidic Methylamino Methylxanthine Nicotine Carboxylic acid Thiol Streptomyces…

Q: consider 0.10 M aqueous solutions of each of the following substances: HlO, NH4ClO4, HClO4, KlO,…

A: Given :  Ka for HIO = 2.3 x 10-11  Ka for HClO4 = 107  Kb for NH3 = 1.8 x 10-5

Q: A sample of seawater contains 1.9 g of calcium ions in 5364 kg of solution. What is the calcium ion…

A: Given  Mass of solute (calcium ions) = 1.9 g Mass of solution = 5364 kg = 5346×103 g Concentration…

Q: Calculate the hydronium ion concentration of a solution with a pH = 4.47. Enter your answer in…

A: Given-> pH = 4.47

Q: Write the concentration equilibrium constant expression for this reaction. Cr₂0 (aq) +61 (aq) +14 H*…

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Q: If you have 155 mL solution of a 0.762 M FeCl, solution, how many moles of FeCl, are contained in…

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Q: the reaction? cycloaddition CO₂Me CO Me HPh CO₂Me CO₂Me

A: Organic compounds can be defined as the compounds that contain carbon and hydrogen atoms in a…

Q: Explain the diagram below in terms of kinetic and potential energy. Is the combustion of automobile…

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

Q: (27) What is the value of the equilibrium constant (Kea) when the following redox reaction takes…

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Q: A chemist adds 305.0 mL of a 0.41M barium chloride (BaCl₂) solution to a reaction flask. Calculate…

A: Given,  Volume of solution = 305.0 mL                                     = 0.305 L  Concentration…

Q: The reaction Na₂SO4-10H₂O → Na₂SO4 (8) + 10H₂O(g) has a K₂ = 5.38 x 10-12 at 21.3°C What is its K R…

A: For a gaseous reaction, the equilibrium constant can be measured by the concentration of the…

Q: (0.714000) / (2.80 x 10^-15)     (This is 10 to the  -15th power) Espress in scientific notation…

A: Significant figures of a numbe are digits in the number that are necessary to indicate the quantity…

Q: how to draw chair conformations as consituinal isomers?

A: Constitutional isomers are structural isomers the compounds that share same molecular formula but…

Q: 4. What was the molarity of a volumetric solution of disodium edetate if 28.50 mL of the solution…

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Q: Complete the following table, which lists information about the measured acid dissociation constants…

A: pKa value: pKa value negative logarithm of the acid dissociation constant (Ka). pKa = -logKa Low pKa…

Q: Write the molecular, total ionic, and net ionic equation for the following precipitation reaction of…

A: Write molecular , total ionic and net ionic equation ---

Q: E) None of the above are in order of increasin 7) The bond in which one of the following pairs of…

A: Here we have to determine the most polar bond in the following given bonds .

Q: The pH of a 0.800 M aqueous solution of a weak acid is 1.99. What is the value of Ka for this acid?

A: Given  pH = 1.99 Concentration (c) = 0.800 M Ka =?

Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

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Q: The following data were obtained for the reaction 2 CIO2(aq) + 2 OH (aq) → CIO3(aq) + ClO₂ (aq) +…

A: Given :-  The given reaction is 2ClO2 (aq) + 2OH- (aq) → ClO3- (aq) + ClO2- (g) + H2O (l) ....…

Q: (24) The gold-plating of a ceramic figurine requires a total of 2.78 g of solid gold. If the current…

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Q: The rate constant k for a certain reaction is measured at two different temperatures: temperature k…

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Q: The standard reduction potential of the Pb2+/Pb electrode is -0.13 V and the standard cell potential…

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Q: (22) A concentration cell running at 25°C consists of two Pb (s)/Pb2+ cells. If the concentration of…

A: In part 2  we have to calculate Ecell

Q: Synthesize the following compound from benzene. CI A. D. AICI 3 Br₂ hv B. E. ra SO₂H KMnO4 SO3 H₂SO4…

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Q: Complete the equation for the reaction between each Lewis acid-base pair. CH3 H3C-CH-CH3 H • Use the…

A: According to the Lewis definition, the species which donates lone pair of electrons acts as a Lewis…

Q: To measure the concentration of an aqueous solution of H₂O2, an analytical chemist adds strong acid…

A: Given following balanced Chemical equation -  6H+(aq) + 5H2O2(aq) + 2MnO4- (aq) ----> 5O2(g) +…

Q: (25) With respect to the following unbalanced redox equation that takes place in basic solution:…

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

Q: at 0.125 M aqueous solution of a weak base is 9.2% ionized. what is the pH of the solution?

A: Given  Concentration (c) = 0.125 M Percentage ionization = 9.2 % pH = ?

Q: 4. What was the molarity of a volumetric solution of disodium edetate if 28.50 mL of the solution…

A: Molarity of a solution is defined as number of moles of solute dissolved per litre of solution.

Q: Materials engineers often create new alloys in an effort to improve the properties of an existing…

A: Here we have to determine the mol % and Wt % of Zn in the following given alloy Zn0.844Cd0.156O.

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.