d) 7-hydroxycoumarin forms one-dimensional hydrogen-bonded chains in the solid state. Coumarin-3-carboxylic acid forms hydrogen-bonded dimers. Coumarin does not show hydrogen bonding. (i) Using a diagram, define the term hydrogen bonding and use your answer to explain the differences in hydrogen bonding between the two molecules. (ii) Draw the hydrogen-bonded chain observed in 7-hydroxycoumarin and provide the graph-set notation to describe the motif. You should show at least 3 molecules. (iii) Draw the hydrogen-bonded dimers observed in coumarin-3-carboxylic acid and provide graph-set notation to describe the motif. You should show 2 molecules.

Q: The ionization constant for ammonia is 1.8 x 10-5. What is the pH of an aqueous solution labeled…

A: we have to calculate the pH of 0.50 M ammonia solution

Q: Indicate the polarization (with a 8 and 8) of the highlighted bond in the following compounds: CI Li…

A: Polarization means there is separation of charge between two atoms due to difference in…

Q: The ionization constant for ammonia is 1.8 x 10-5. What is the pH of an aqueous solution labeled…

A:

Q: A reaction has an activation energy of 225,0 kJ/mol. By what factor will the rate constant, k,…

A: Arrhenius equation: Arrhenius equation give the relationship between the activation energy and the…

Q: Draw a schematic diagram showing the traction processes of caffeine.

A: Method to extract caffeine from instant coffee, 1. Take 10 g of ground coffee + 4 g sodium…

Q: 2. What mass of methane (CH4(g) + O₂(g) AH°rxn-890kJ/mol CO2(g) + H₂O(g) must be burned to release…

A: Given, CH4(g) + O2(g) ----> CO2(g) + H2O(g) ∆H°rxn = -890 kJ/mol mass of methane (CH4) must burn…

Q: Platinum is a precious metal that is used as a catalyst for many important industrial reactions.…

A:

Q: How long would it take to deposit 15.0 g copper metal at the cathode of an electrolysis cell running…

A: Concept:  From the molar mass of copper and the electron involved for deposition we can predict the…

Q: 7. Assign E or Z configuration to the following molecules: (A) (B) (C) (D) (E) I= Z; II = E I=E: II…

A:

Q: Write equations depicting the behavior of the following Arrhenius acids and bases in water. (Use the…

A: Arrhenius acid gives H+ ions in aqueous solution.  Arrhenius base gives OH- ions in aqueous…

Q: suppose a current of 0.510 A flows through a copper wire for 281. seconds, calculate how many moles…

A:

Q: None of these structures Any of these structures Y H₂, Pd/C

A: Organic reactions are those in which organic reactant react to form organic products.

Q: If AuBr has a Ksp of 5.0 x 10-17  and a solution of AuBr has a bromide ion concentration of 7.1 x…

A:

Q: Consider the cell described below. Al | Al3+ (1.00 M) || Pb²+ (1.00 M) | Pb Calculate the cell…

A: Consider the cell :  Al | Al3+(1.00 M) || Pb2+(1.00 M) | Pb  Changed concentration for Al = 0.46…

Q: Extra_task 2: Mark the relationships between the following structures as either "same”,…

A:

Q: NH₂ OMe (i) PhCHO, cat. H+ (ii) BF3.OEt₂ SiMe3 Ph HN OMe

A: Steps of the organic transformation are given below:

Q: 10 110 12 each compound with the predominant intermol ed between the molecules of the compound: u 1.…

A: The intermolecular interactions are the intermolecular forces which mediate interaction between…

Q: Q/Give the IUPAC name for each ofthe following polymers? (- OCH2CH-Ph-) (-O-CH2CHCI-)…

A: IUPAC names of the polymer is given following certain rules made by IUPAC.The naming of polymer is…

Q: 1. How many grams of potassium chloride are needed to prepare 400 ml of a 250 M KCl solution? 2.…

A: Formula of molarity and dilution law would be used.

Q: The bond order for a molecule of Ne₂ would be?

A:

Q: 2-Stretching frequency of the O=C bond of a compound (3-butene-2-on) is less than the stretching…

A: We have to select the factor which explains the given statements based on IR spectroscopy

Q: Metals with body‑centered cubic (bcc) structures, such as molybdenum, are not close packed. If they…

A:

Q: how would you sample, preserve and prepare these samples for GC analysis and why GC is the best…

A:

Q: An analytical chemist is titrating 133.0 mL of a 0.2700 M solution of piperidine (C,H, NH) with a…

A:

Q: Use the References to access important values if needed for this que Identify each of the following…

A:

Q: Why do using e O The The O diol

A:

Q: Calculate the Eocell and equilibrium constant for the following reaction at 25oC. Write the answer…

A:

Q: Calculate the volume in kL, at SATP, of H2(g) produced when 963 g of CH4(g) reacts with excess steam

A:

Q: Calculate the pH of the cathode compartment for the following reaction given cell = 3.01 V when…

A: Here we have to determine the H1+ concentration of the given Galvanic cell . The given problem can…

Q: 1) Determine the absolute configuration of the following compounds according to the (E)- (Z)-system…

A: E/Z stereoisomerism is shown by alkenes where each of the C of the -C=C- is attached to two…

Q: 2) Determine the absolute configuration of the following drugs according to the (E)-(Z) system (a)…

A: We have to determine the absolute configuration of the given molecules

Q: What is the internal energy (in J) of 5.50 mol of an ideal monatomic gas at 201°C? J

A: Given: Monoatomic gas number of moles, n = 5.50 moles Temperature, T = 201°C = 474.15K

Q: d. For which of the following atoms/ions Li, Li²-, Na+, He", C5+, could the Rydberg formula be used?…

A: d. For which of the following atoms/ions, could the Rydberg formula be used?

Q: The amount of ethylene resulting from the thermal solution of butane is twice the amount resulting…

A: Two questions based on general chemistry that are to be accomplished.

Q: why is titration IN CALCIUM CONTENT IN CALCIUM SALT experiment considered to have reached the…

A: Calcium content in calcium salt is titrated using Complexometric titration using EDTA.

Q: (3) Write a balanced nuclear equation for the beta decay of each of the following: 44 a 19 20 b. 0…

A: Nuclear reaction: The given reaction is a nuclear reaction. In the nuclear reaction, one nuclide is…

Q: The decomposition of hydrogen peroxide, H₂O2, has the rate law: Rate = K[H₂O2]. The rate constant is…

A:

Q: Question 4 Which procedure accurately describes preparing a 1000. mL solution of calcium chloride…

A:

Q: A cylinder with a moveable piston contains 0.521 mol of gas and has a volume of 270 mL. What will…

A: Answer: This question is based on ideal gas equation which is shown below: PV=nRT Here: P=pressure…

Q: The molarity of an aqueous solution of hydrobromic acid, HBr, is determined by titration with a…

A:

Q: H3C. H3C The structure shown here is what type of organic formula? CH₂ CH CH CH3 CH3 A) structural…

A: We can represent a organic compounds in different different types.

Q: 54. Which of the following is the best representation of an amino acid at a pH=13.0 (R = any side…

A:

Q: A weak acid has K₂ = 1.00 x 103. If [HA] = 1.00 M what must be [A] for the pH to be 2.7? 0.50 M 2.0…

A:

Q: 2) 2) NaBH ARK NH₂ B C

A:

Q: The solubility product for Cu(OH)₂(s) is 1.6x 10-19. Calculate the value of 8° for the following…

A:

Q: What is the major product of this reaction? HO D C A H B (A) None of these OCH3 OCH 3 H NaBH4 MeOH…

A:

Q: The Density of a gas was measured at 1.50 atm and 27°C and found to be 1.95 g/L. Calculate the molar…

A:

Q: What is the major product of this reaction? O H HCN ???

A:

Q: 2. Draw the product and the mechanism of the following Diels-Alder reaction. H OH "O O O NO₂…

A: Two questions based on introduction to organic chemistry that are to be accomplished.

Q: The reaction of K3 [Fe(CN)6] with freshly prepared FeSO4 solution produces a dark blue precipitate…

A: Please find the below attachment.     Thank you.