Why is spandex both strong and flexible?

Q: list the apparatus involved in volumetric or titrimetric analysis

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Q: What is an empirical formula? What is a molecular formula? Do ionic compounds have molecular…

A: Empirical formula  :-   The empirical formula is the simplest formula for a compound which is…

Q: Solve the following stoichiometry problem using this balanced equation. 3NO2+H2O->2HNO3+NO How many…

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Q: Can you help me find the enthalpy, entropy and gibbs free energy value for this equation C4H7CI(1)…

A: ΔHrxn = [ΣniΔHf (Product)] - [ΣniΔHf (Reactant)] Where, ΔHrxn = Enthalpy of Reaction ni and ΔHf is…

Q: 12) Identify the compound for the following ¹H NMR (Hint: a quartet at 3.57 ppm and a triplet at…

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Q: 2HF (g) = H₂(g) + F₂ (g), Kc = 1.0 x 10-95 ibrium mixture contains mostly reactants. 2NO(g) + O₂(g)…

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Q: The molar solubility of PbBr2 is 2.17 x 10-3 M at a certain temperature. Calculate Ksp for PbBr2.

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Q: What is the hybridization of the central atom in a molecule with a trigonal-planar molecular…

A: Given -> Trigonal planar

Q: Ammonia, NH3 (g), is produced when nitrogen gas reacts with hydrogen gas at 304 kPa and 25.0°C.…

A: Here we are required to find the percentage yield of ammonia formation

Q: Pls help on both questions.

A: Valence bond theory is the theory of molecular orbital theory which is developed to use methods of…

Q: Which chemical change listed below represents a decrease in entropy?   Choices: a. N2(g) + 3H2(g) ®…

A: Given,  The listed chemical equations that represents a decrease in entropy is:

Q: (3Z,5Z)-4-methyl-3,5-nonadiene (2E,4E)-1-chloro-3-methyl-2,4-hexadiene…

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Q: 2. If 116.7mL of propane gas is released from a gas tank at 23°C, what temperature, in °C, would be…

A: Given,  Initial volume in mL = V1 = 116.7 mL  Initial temperature in 0C = T1 = 23 0C  Final volume…

Q: Which change does not shift equilibrium to the right (the forward direction)? Decreasing product…

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Q: Predict the product and draw the active electrophile for each reaction shown below. AICI3 AICI3 Y…

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Q: 2. Kidney stones are made of minerals and salts forming hard deposits inside your kidneys. One type…

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Q: A balanced chemical reaction that includes the energy change during the reaction is called the…

A: chemical reactions are of two types exothermic and endothermic reaction.

Q: Which monomer is used in the forming the following polymer? 4 CI CI CI CI = ||| CICI IV

A: Polymerization is a process in which relatively small molecules called monomers combine chemically…

Q: The reaction below will occur most rapidly in which of the following solvents? NaOH CI OH…

A: Substitution recation which are bimolecular in nature  takes place  in aprotic Solvent.

Q: What is the relationship between the following two compounds? C₂H5 H OH Ho HI COOH HOI CI НООС C₂H5…

A: -> Compounds are enantiomer if the configuration at each chiral center is just opposite to each…

Q: Which of the following compounds will give the same product upon reacting with excess H2/Pd/C? A) I…

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Q: Give a clear explanation handwritten answer...give answer in detailed..give the structure of given…

A: A question based on nomenclature that is to be accomplished.

Q: The initial concentrations of NO, Br₂ and NOBr are 2.50 M, 5.00 M and 1.00 M respectively. At…

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Q: ● ● Polar (hydrophilic) Non-polar (hydrophobic) Amphiphilic (a surfactant) ●

A: 1. Polar (hydrophilic) Hydrophilic means the compound which attracted to water, while means a…

Q: Choose the correct balanced equation for the chemical reaction described below. Ammonium carbonate…

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Q: CH3 CI CH₂CH3 +H -H CI A CH3- CI B CH3 CH3 CI H C C/ CH3 H D

A: Basic Rule to identify enantiomer: Write R,S nomenclature of isomers. If configurations are R&S…

Q: Write the structure of a ) Neopentane b ) Trichloro ethanoic acid

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Q: to form carbon dioxide and water vapor. Write a balanced equation for this reaction. _CgH₁8 (1) + O₂…

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Q: Which of the following equilibria is an example of a homogeneous equilibrium? A 2BrF5(g) Br₂(g) +…

A: If all the reactants and products are of the same phase, then the equilibrium is known as a…

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

A: Given: The pH of the sodium hydrogen carbonate-sodium carbonate buffer = 9.40  We have to find the…

Q: A aqueous cleaning solution has a total mass of 4.50 kg, 630 g of which is hydrochloric acid.  What…

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Q: Which of the following would be a non-spontaneous reaction?     Building CO2 and H2O into glucose…

A: Here option A is correct  Building CO2 and H20 into glucose . A rock rolling down a hill is…

Q: Which of the following statements are consistent with compound X below? лятно NH₂ X I. X has an odd…

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Q: The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: E-- In this…

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Q: The brown gas NO2 and the colorless gas N₂O4 exist in equilibrium, 2NO2 N₂O4. In an experiment,…

A: The solution is given below -

Q: Which of the following set of conditions will accomplish the following reaction? A. Na, NH3(1)-33°C.…

A: Alkyne react with various reducing agents and can undergo partial reduction as well as fully…

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: In the reaction aA + bB cC + dD where a, b, c, and d are stoichiometric coefficients, which of the…

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Q: Question 27 In the equilibrium reactions listed below, how many reactions show that Kp = Kc. Rxn I:…

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Q: A solution of HNO3 is standardized by reaction with pure sodium carbonate. 2H+ + Na₂CO3 → 2Na+ + H₂O…

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Q: How many distinct monochlorination products are possible when the alkane below undergoes free…

A: in the monochlorination product, one H is substituted by chlorine and one Cl is attached to the…

Q: Crion a Structure below for this Structure choose the correct options for the Chemical Shifts for…

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Q: 1. Ethanol 2. Ph. Ph KOH Ph- ota. En a осон OH = Proton transfer d Radical chain addition. E2…

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Q: A saturated solution of AB2 contains 8.60 x 10.4 moles AB2 per liter. Determine Ksp.. 2.54 x 10-⁹…

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Q: QUESTION 8 Which of the following statements about propene, CH 3CH CH 2, is correct? All the carbon…

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Q: Which of the following reaction conditions can be used to synthesize an ester (RCOOR')? An acid…

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Q: Why does chirality make a difference when new medications are developed? What is an ethical way of…

A: Introduction :  Chirality can be defined as the if an object has a plane of symmetry and it's the…

Q: Use collision theory to explain each of the following: Milk stored in the refrigerator will keep…

A: We know that, with the help of collision theory we can predict what conditions are necessary for a…

Q: 3. The following reactions happen simultaneously when HCl is added to a mixture of Mg(OH)2 and…

A: Given the mass of the mixture = 25 g  % composition of MgCO3 = 35.2 % % composition of Mg(OH)2 =…

Q: 2. Propose a full mechanism using curvy reactions arrows for the following transformation. A

A: The pericyclic reactions are the reaction which involves cyclic transition. It will involve breaking…

Group 14 Elements

The following elements come under group 14 of the periodic table.