How will you prepare standard solution of catechin (50, 100, 150, 200, 250 and 300 mg/L) scaled down to  50 mL?

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Q: . An ideal gas with Cv = 1.62 kJ/kg-K and R = 273J/kg-K expands from 0.15m3 cubic meter) and 27 deg.…

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Q: 3. Given the following AH° values, H2(g) + 202(g) → H20(1) H,O2(1) → H2(g) + O2(9) AH° = -285.8 kJ…

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Q: Consider the following electrochemical cell notation with a cell potential of 1.22 V. Pt(s) | H2(g,…

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Q: Noble gases are not easily oxidized, but are found in elemental form or combined with sulfur,…

A: Nobel Gases has Full filled Valence shell which make them inert in the atmosphere.

Q: What is the name and molecular formula of the structure?   Select one

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Q: A chemical engineer must calculate the maximum safe operating temperature of a high pressure gas…

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Q: iv) At STP, one mole of an ideal gas occupies... a) 10.22 L b) 20.24 L c) 30.22 L d) none of these

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Q: Hydrogen bonding is the dominant intermolecular force in C2H6 NH3 PH3 All of the above

A: Hydrogen bonding :- It is a special type of dipole-dipole intermolecular force of attraction  It is…

Q: Explain the difference between a. nucleation and particle growth b. occlusion and mixed-crystal…

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Q: Question 2 The complex (Cu(NH,,"absorbs hight with a wareleng th af 342 nm.What is the value of A in…

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Q: Which of the following statements is incorrect? O In metallic indicator electrodes, the potential…

A: A multiple choice question based on electrochemistry that is to be accomplished.

Q: structure of (R)-3-fluoro-3-methylhexanal

A: Given,  What is the structure of the compound = (R)-3-fluoro-3-methylhexanal

Q: B. Complete the following reaction 1. CH,CH, -C- CH, + H, 2. Br O CH,CHCH -C-H+(0)- CH 3. C-H +2CH,…

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Q: A 50.00 mL aliquot of saline solution was acidified with dilute nitric acid and  titrated with 22.00…

A: In the given method to determine NaCl or Cl-(aq) content in saline, first, excess Ag+(aq) is reacted…

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Q: a. Calculate the standard cell potential for a battery based on the following reactions= Sn2+ + 2e…

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Q: XS HI + H,0 IV II III O II O IV

A: In this question we have to tell the starting material of the given reaction and also its mechanism.…

Q: 4. What would be the limiting reactant if 9 g of water reacted with sodium to form 0.4g H2?

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Q: Use the Maxwell relations to show that the entropy of a perfect gas depends on the volume as Soc R…

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Q: + 502s) 4NO + 6H,O Calculate the AH for the reaction 4NH, 1. N +O 2NO + Ozie) AH = -875.0 kJ/mol 2 N…

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Q: Qu For the yecaction of Nansog+KIO, Explain whest these gruphs mean? → Na,sout kasou +h a) () [KIO;J…

A: Second order rate -

Q: What is the pOH of a buffer solution that contains 45.0mL of 0.020M H3PO4 and 25.0mL of 0.0020M…

A: pKa1 of H3PO4 - 2.14 Given, Volume of H3PO4 - 45.0 mL Strength of H3PO4 - 0.020 M Volume of NaH2PO4…

Q: Which of the following chemicals would be the best buffer for a pH 9.00 solution: NH3 (Kb =…

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Q: why liquids like mineral oil or acetone are not good at dissolving salts, or why mineral oil and…

A: This is because of the fact  that mineral oil are aprotic in nature

Q: The vapor pressure of water at 20.0 ºC is 17.5 torr. At that temperature, what would be the vapor…

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Q: A cell can be prepared from copper and tin. What is the E call for the cell that forms from the…

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Q: Write equations for the hydrogenation of 3,4-dimethylhexanal and 2- chloropentanal.

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Q: Balance the following electrochemical reaction in acid: MnO 4 (aq) + Zr( s) → Mn –"( aq) + Zr + Zr…

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Q: b) the mass of used acetylene in pounds 0.734 0.434 0.299

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Q: Given the half-reactions and their respective standard reduction potentials Cu³+ + 2 e- – Cu+ E; =…

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Q: How much 1.0 M sodium bicarbonate solution (in mL) is needed to stoichiometrically react with 25 mL…

A: Given that -  Molarity of sodium bicarbonate Solution = 1.0 M  Volume of acetic acid = 25 mL  Weight…

Q: Question 46 Which of the following statements about titration curves is false? O The equivalence…

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Q: What is the mass of a golf ball traveling at 88.1 ms1? The rest mass of a golf ball is 45.9 g, as…

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Q: What would be the theoretical freezing point of a solution made by dissolving 10.43 g of NiCl 2 in…

A: Given,  the theoretical freezing point of a solution is:  by dissolving 10.43 g of NiCl 2 in 365.0 g…

Q: Draw structures for (i) N-ethyl-N-methyl-4-methylpentanamide and (ii) t-butylamine

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Q: This isn't a graded question... please don't reject it and solve this on your own Any help would be…

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Q: Calculate the pH of a 0.200 M solution of NH,CI. The K, value of ammonia is 1.8x10-S and…

A: Given,  [NH4Cl] = 0.200 M  Ionization constant of NH3 = Kb = 1.8 x 10-5  Calculate the pH = ?

Q: HCN + HPO4 2- CN-1+ H2PO4 -1 Which specie is the conjugate base?

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Q: Using the grignard reaction of alkanes what is the resulting alkane if the reactant is C4H9Br? a.…

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Q: The percent yield of this reaction is

A: Given reaction is           2 Al      +     3 F2    -->    2 AlF3          2 x 27 g.…

Q: NH2 OH NEN: `NH2 IZ IZ

A: Aniline reaction with nitrous acid(HNO2) to form diazonium salt.

Q: Which is not true of the standard conditions for electrochemical cell measurements? O a. Solutes are…

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Q: 208 missing product in the following nuclear reactions. -> 208 82Pb + ? b. 263 106Sg→ 42He +? С. ?…

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Q: Calculate the pH at the equivalence point of 25.0 mL solution of ascorbic acid, titrated with 45.3…

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Q: Given that u 0.25Katm- for nitrogen, calculate the value of its isothermal Joule-Thomson…

A: The equation for Joules-Thomson coefficient is μT, μT=-Cp×μ For diatomic molecule nitrogen, Cp = 7/2…

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.