7.How many repeating units per molecule are there in each of the following cases: a) a sample of Teflon whose molecules have a MW of 500,000 b) Polyvinyl chloride with a molecular weight of 750,000

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Q: The following reactions happen simultaneously when HCl is added to a mixture of Mg(OH)2 and MgCO3:…

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Q: [References] The compound below is treated with chlorine in the presence of light. CH3 CH3CHCH₂CH3…

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Q: 6. Determine the cell voltage for the following cell Fe) + Cd²+ (2) = Fe²+ (29) + Cd(1) when (a)…

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Q: A molecule with 2 single bonds and 3 lone pair of electrons is predicted to have which type of…

A: Given -> Number of bond pair = Nbp= 2  Number of loan pair = Nlp = 3

Q: (c) What is molecular mechanics (MM)?

A:

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A: The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula : E = -(…

Q: IR Spectrum (KB/ disc) 4000 ent % of base peak 3000 44 100 80 60 40 20 40 13C NMR Spectrum (100.0…

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Q: What is the stereochemical relationship between the following pairs of molecules? In the blank type…

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Q: When 24.5g of NH 3 reacts, the actual yield of H 2O is 26.5g.  What is the percent yield?  4NH 3(…

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Q: Which keto product would be isolated from the reaction shown? 1. BH3/THF = 2. HO, H2O2. 20 OH OH C A…

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Q: Explain why the melting point of your prepared alum must either be equal to or be less than the…

A: Alum : It is the double salt which is mainly used in water treatment or has medicinal uses.

Q: What is the IUPAC name for the following compound? A) 3,5-dimethylhex-4-en-2-ol B)…

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Q: 2. Write the IUPAC name and three common names for each of the following chalcones. A. Br CI B. CI

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Q: Draw the structual condensed formula of 4-ethyl-1-heptyn.

A: Draw the structural condensed formula --

Q: The equilibrium constant, Ke, for the following reaction is 0.0180 at 698 K. 2HI(g) → H₂(g) + 1₂ (9)…

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Q: 2NO (g) + O₂ (g) → 2 NO₂ (g) Through experimentation, she finds that changing the concentration of…

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Q: Pls help on both questions.

A: The above questions can be answered as follows

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Q: A sodium hydrogen carbonate-sodium carbonate buffer with a pH of 9.40 is prepared. Determine the…

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Q: The quantum numbers, n = 4, 1/= 1, m, = 1, m, = +1/2, represent an electron in a subshell 4p O 3p 3s…

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Q: Pls help on both questions.

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Q: A 1.53 L sample of gas is warmed from 250.0K to a final temperature of 499.0K. Assuming no change in…

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Q: estion 2 nsider the reversible reaction at equilibrium: 2 SO2(g) + O2(g) +2 SO3. a certain…

A: Equilibrium constant expression,  Kc = [SO3]2/[O2][SO2]2

Q: Question 31 Consider the gaseous reaction at 450.0 K 2A(g) + B₂(g) → 2AB(g) Time (min) 0 100 200…

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Q: 8. Assume a concerted process is taking place and draw the mechanism of the following reaction. OTS…

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Q: 2. The specific rotation of (S)-carvone (at 20°C) is +61. A chemist prepared a mixture of…

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Q: 3.Which of the following compounds is the most alkaline alkaloid? OH LOCH ₂3 OCH3 og C CH3 HO HO B D…

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Q: Question 24 On analysis, an equilibrium mixture for the reaction 2H₂S(g) 2H₂(g) + S₂(g) was found to…

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Q: Give a clear handwritten answer with explanation...give only Correct answers with short explanation

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Q: Provide the correct systematic name for the compound shown here. H3C

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Q: When you dissolve KCl in water, does the reaction give off heat or absorb heat? Is the dissolution…

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Q: HBr (1 equiv) H₂O2 Drawing Atoms, Bonds and Rings Chal Draw or tap a new bond to see suggestion

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Q: Draw a complete structure for a molecule with the molecular formula C3H8O

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Q: 11. A suspension of milk of magnesia, Mg(OH)2, is analysed by back titration. A 1.0391 g sample is…

A: Solutions                   Calculate the weight percentage of magnesium hydroxide in the sample..

Q: What is the formal charge on N in NO3? (don't do resonance) Oa) -2 O b) 0 Oc) +2 O d) -1 e) +1

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: How much energy is needed to convert 59.5 grams of ice at 0.00 °C to water at 60.9 °C? Information:…

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Q: H H H H A) stereoisomers B) geometric isomers C) constitutional isomers D) optical isomers E) They…

A: Stereo isomer - same molecular formula , diffrent in stereo   Optical isomer- have chiral centre,…

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.