Selenium is a photoconductor which means O it is an insulator in the dark and a conductor when exposed to light. O it conducts photons. O it has a positive charge when exposed to light. O it is a conductor in the dark and an insulator when exposed to light.

Q: You want to prepare a buffer solution with pH equal to 3. How many grams of NaF (41.99 g/mol) should…

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Q: D Listen Water is one product of this reaction, what is the second? но CH3 H H H3C. H H for H3C O.…

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Q: 1. NABH, (0.5 eq.), CH3OH, 0° C H. 2. HCI, H20 HO, OH HO, OH OH HO, HO, H.

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Q: One beaker contains 244 g of water at 24 °C, and a second beaker contains 69.2 g of water at 95 °C.…

A: When water is mixed , water at higher temperature will lose heat and that heat will be gained by…

Q: hydrochloric acid taa) maghesi um A magnesium chloride m= 0.24 g m= 31.51 reactant a) identify thie…

A: Recall the given reaction,Magnesium s  +  Hydrochloric acid aq  →  Magnesium chloride aq  + H2O…

Q: For the reaction below, which one of the following possible products is (CH3),CONA THE Br…

A: Organic compounds can be defined as the compounds containing carbon and hydrogen atoms.For example…

Q: )Listen Which type of hydrocarbon always contains carbon-carbon triple bonds? O Alkanes Aromatics O…

A: Type of Hydrocarbons Alkanes : alkanes are the hydrocarbons always contains Carbon- Carbon single…

Q: (b) The ring opening of epoxides (oxirancs) with thiols is catalysed by sodium hydroxide in aqueous…

A: pH-rate profile: The pH-rate profile of a reaction is a graph in which log(Kobs) is plotted against…

Q: A4-carbon chain that has a triple bond and no other substituents would be called

A: Given that no substituents are present in 4 carbon chain other than a triple bond.

Q: The diprotic acid lactic acid is produced as a result of anaerobic respiration. Raquel titrates the…

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Q: II What occurs in the initiation step of an addition polymer? Adding hydrogen gas Cross-linking Free…

A: The correct answer about initiation step of addition polymer is given below

Q: How to set-up a separatory funnel? Please narrate the process in 5 sentences.

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Q: vhat rate B is

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Q: Select the element whose +2 oxidation state is least stable in water. O Ni Co Ov Zn

A: Hydration energy: when one mole of ionic crystal is dissolved in water the water molecules are…

Q: Fill in the blanks. INCREASES or DECREASES??? 8. As a solution becomes more acidic, the pH Answer:…

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Q: Given the data below, calculate E°cell for the reaction below. 3Cu(s) + 2NO3-(aq) + 8H+(aq) ---->…

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Q: Balance the following oxidation-reduction reactions that occur in basic solution (Use the lowest…

A: A reducing agent is one of the reactants of an oxidation-reduction reaction which reduces the other…

Q: What amount of heat (in KJ) is required to convert 25.6g of an unknown solid (MM =83.21g/mol) at…

A: Heat will be used in three processes,  1)   rising of temperature of solid till freezing point. 2)…

Q: 3) Fill in the diagrams below with electrons corresponding to each element. Carbon Охуgen Hydrogen

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Q: 4. How much heat is needed to evaporate 2g of ethyl alcohol?

A: Given,  The mass of ethyl alcohol = 2 g.  The heat needed in the transformation is:

Q: 2. Draw a line-bond structure for each of the following molecules: a. 2,2,3,3-tetramethylpentane b.…

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Q: A solution is prepared by mixing 20.0 mL of methanol with enough water to produce 400. mL of a…

A: Given - - > Volume of methanol mixed = 20.0 mL Volume of the solution formed = 400.0mL Percent by…

Q: Calculate the pH of vinegar if it has a hydronium ion concentration of 2.8x10-3 M? Use sig. figs.…

A: Given - - - > Concentration of hydronium ion  [H3O+]  = 2.8 x 10-3 M pH of vinegar =?

Q: The following titration curve is expected from which acid-base pair? Equivalence Point pH = 7 PH…

A: To determine acid base pair , we need to check the pH at equivalence point and trend of given curve.…

Q: Consider the following equation: 3C2H2(g) ↔ C6H6(g) ΔGof(C2H2, g) = +209.2 kJ/ mol; ΔGof(C6H6, g) =…

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Q: sodium carbonate reacts with nitric acid according to the following equation…

A: Answer: part1) 0.59 mol Na2CO3, part2) 0.071 mol CO2

Q: M. The maximum amount of calcium phosphate that will dissolve in a 0.164 M sodium phosphate solution…

A: To determine the maximum amount of calcium phosphate that will dissolve in a 0.164 M sodium…

Q: the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-3 min-1. If…

A: Given reaction followed first order kinetics

Q: What is the mass of H2SO4 (molar mass 98 g/mol) in 400. mL of 0.100 M solution? O 3.92 g O 4.90 g…

A: Given, Concentration of the solution = 0.100 M= 0.100 mol/L Volume of the solution = 400.0 mL = 0.4…

Q: Which class of hydrocarbon derivative has the general formula R - NH2? Aldehyde Alkyl Halide OAmide…

A: Given-> R-NH2 Functional group is the atom or group of atoms which attach with carbon compound…

Q: The equilibrium concentration for a reaction were found to be the following 0.54M  [ HI] ,   0.5M […

A: Kc is the ratio of the equilibrium concentrations of product over equilibrium concentrations of…

Q: A 200.1 g piece of metal at a room temperature of 25.0°C is heated to 100.0°C. The heated metal is…

A: Given, mass of metal , M=200.1 ginitial temperature, Ti = 25.0 °C=(25+273)K=298 KFinal temperature,…

Q: Data and Otbservations Initial temperature of ice 23-62 27-7°C 30 1 9.4°C Temperature of the ice and…

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Q: Determining the formula of a hydrate: NOTE: Show all steps! A hydrate of magnesium sulfate has…

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Q: Draw the condensed structural formula for the triacylglycerol made from 3 saturated fatty acids that…

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Q: Which of the following increases the value of Keg for the reaction below? bə 2 CO2(e) 2 20CO() +…

A: For an equilibrium reaction , equilibrium constant is only affected by change in temperature. Any…

Q: For given pair of compounds, identify which compound is the stronger base, and explain your choice:…

A: Which of the following is a stronger base?  Both structures are aromatic (follows 4n+2 π electrons…

Q: In the first step of the synthesis (shown below), which of the following reaction conditions could…

A: In this given step, an aldehyde is converted to alcohol, this is a reduction process. So reducing…

Q: Convert the mass of one electron (m=9.10*10^ -31kg) to energy. Recall the speed of light c = 3.00 *…

A: Given that, m=9.10×10-31 Kg  c= 3.00×108 m s-1 Energy E = ?

Q: Consider 4.30 of a gas at 365 mmHg and 20. °C. If the container is compressed to 2.30 L and the…

A: Given, Initially: Pressure (P1) = 365 mmHg Volume (V1) = 4.30 L Temperature (T1) = 20°C = (20 +…

Q: The process by which sweat is used to cool the body is endothermic.   True  False

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Q: Which of the following is a conjugate acid-base pair in the following equation? H3PO4 + H2O → H3O* +…

A: Which of the following is conjugate acid-base pairs---

Q: Question 3. a) Write balanced chemical reactions for the following reactions: 2 equ. H2O X…

A: Dimethyldichlorosilane is an organosilicon compound. It is colourless at room temperature and…

Q: Write a balanced molecular equation for this combination. If a reaction occurred, write a complete…

A: Balanced chemical equation: Balanced chemical equation can be defined as the reaction in which atoms…

Q: Possible Unknowns OH (E)-3-methylpent-2-ene bp = 69 °C pentan-3-one bp = 101.5 °C pentan-3-ol bp =…

A: In the GC column the low boiling compounds elutes firsts.

Q: using the image, explain the structure and formation of hydrated ions.

A: Given : We have to explain the reaction taking place in image.

Q: Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at…

A: Given that, an electrochemical cell is Cus|Cu2+0.11 M||Fe2+0.0063 M|Fes. Also, the standard…

Q: Predict the product of the following sequence. 1. F2, hv 2. Mg, ether 3. CH2CH3 H CH3 ČH3 4. H3O+…

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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.