Chemistry concepts and calculations
117302 questions • Page 2069 / 2347
Why is 1,3-octadiene more reactive towardelectrophilic hydration, than 1,7-octad
Why is 1,3-octadiene more reactive towardelectrophilic hydration, than 1,7-octadiene? A. Hydration of conjugated dienesproceeds through a more stable carbocation B. Conjugated die…
Why is 2-butanone used along with K2CO3 for the reflux step in the Williamson et
Why is 2-butanone used along with K2CO3 for the reflux step in the Williamson ether synthesis of acetaminophen and iodoethane to phenacetin? Please explain relevance of 2-butanone…
Why is ATP considered an energy-rich compound? The synthesis of ATP releases ene
Why is ATP considered an energy-rich compound? The synthesis of ATP releases energy that is sufficient for energy-requiring processes in the cell. The oxidation of ATP to carbon d…
Why is Antoine Lavoisier considered by some to be the father of chemistry? Selec
Why is Antoine Lavoisier considered by some to be the father of chemistry? Select one 0 a. Lavoisier was the first person to carry out a chemical reaction and publish a descriptio…
Why is HS04(aq) a weaker acid than H2SO4? Choose one: A. Because HSO4-(aq) only
Why is HS04(aq) a weaker acid than H2SO4? Choose one: A. Because HSO4-(aq) only dissociates to a small extent compared to H2SO4(aq), it is therefore a weak acid and a weak electro…
Why is HTML/Javascript minification beneficial when the HTTP protocol already su
Why is HTML/Javascript minification beneficial when the HTTP protocol already supports gzip data compression? I realize that Javascript/HTML minification has the potential to sign…
Why is Ludwig Boltzmann sometimes credited with being a progenitor of quantum me
Why is Ludwig Boltzmann sometimes credited with being a progenitor of quantum mechanics? Hints O O O O He was responsible for incorporating quantum mechanics into the physics and …
Why is Rijndael restricted to key length in {128, 160, 192, 224, 256} bits (and
Why is Rijndael restricted to key length in {128, 160, 192, 224, 256} bits (and not larger)? The algorithm looks to me like it would support an arbitrary-sized key (multiple of 32…
Why is SDS added to the sample and the gel? What are the two layers of a gel use
Why is SDS added to the sample and the gel? What are the two layers of a gel used in SDS-PAGE? What is the function of each layer? What information can you obtain from SDS-PAGE? W…
Why is [Ca(OH)2] not included in the expression for Ksp? a). Pure solids are not
Why is [Ca(OH)2] not included in the expression for Ksp? a). Pure solids are not included in equilibrium expressions. b). Ionic compounds are not included in equilibrium expressio…
Why is a high pH needed to precipitate the group 3 cations as sulfide solids and
Why is a high pH needed to precipitate the group 3 cations as sulfide solids and a low pH needed to precipitate the Group 2 cations as sulfide solids? Be specific in your explanat…
Why is a pencil, rather than a pen, used to draw the lines on your chromatograph
Why is a pencil, rather than a pen, used to draw the lines on your chromatography paper? O to avoid the interference of ink with the chromatography results O to avoid the evaporat…
Why is a pencil, rather than a pen, used to draw the lines on your chromatograph
Why is a pencil, rather than a pen, used to draw the lines on your chromatography paper? O to avoid the interference of ink with the chromatography results O to avoid the evaporat…
Why is absolute ethanol rather than 95% ethanol used in this experiment? Propose
Why is absolute ethanol rather than 95% ethanol used in this experiment? Propose a structure for the solid that separates when concentrated sulfuric acid is added to the solution …
Why is absolute ethanol rather than 95% ethanol used in this experiment? Propose
Why is absolute ethanol rather than 95% ethanol used in this experiment? Propose a structure for the solid that separates when concentrated sulfuric acid is added to the solution …
Why is acetone used to rinse the original beaker and to wash the solid compound
Why is acetone used to rinse the original beaker and to wash the solid compound on the Buchner funnel? In Step 5 of the Procedure section below, why are you adding calcium sulfate…
Why is acetone used to rinse the original beaker and to wash the solid compound
Why is acetone used to rinse the original beaker and to wash the solid compound on the Buchner funnel? In Step 5 of the Procedure section below, why are you adding calcium sulfate…
Why is atomic emission more sensitive to flame instability than atomic absorptio
Why is atomic emission more sensitive to flame instability than atomic absorption? A 5.00 ml sample of blood was treated with trichloroacetic acid to precipitate the proteins. Aft…
Why is distillation used to separate product from the reaction mixture? One or m
Why is distillation used to separate product from the reaction mixture? One or more answers are correct and you will receive negative points for incorrect answers. The boiling poi…
Why is electrophilic aromatic substitution (preparation of methyl m-nitrobenzoat
Why is electrophilic aromatic substitution (preparation of methyl m-nitrobenzoate important in the real world? Why is it useful and why do people care about it? Please specificall…
Why is electrophilic aromatic substitution (preparation of methyl m-nitrobenzoat
Why is electrophilic aromatic substitution (preparation of methyl m-nitrobenzoate important in the real world? Why is it useful and why do people care about it? Please specificall…
Why is fluorene oxidized more readily than toluene, given that oxidation by O2 i
Why is fluorene oxidized more readily than toluene, given that oxidation by O2 involves free-radical intermediates? Please say why flourene is oxidized more readily. Oxidizing the…
Why is fractional distillation usually preferred over simple distillation when s
Why is fractional distillation usually preferred over simple distillation when separating a mixture of liquids? A. Fractional distillation usually results in a much more complete …
Why is hexaamminecobalt(lI) is blue, while [Ir(NH3)63* is colorless? Both are lo
Why is hexaamminecobalt(lI) is blue, while [Ir(NH3)63* is colorless? Both are low spin d complexes. OA. Both complexes are octahedral but hexaamminecobalt(Ill) has different ligan…
Why is hexaamminecobaltII) is blue, while [Ir(NH3)63+ is colorless? Both are low
Why is hexaamminecobaltII) is blue, while [Ir(NH3)63+ is colorless? Both are low spin d complexes. O A. [Ir(NHa)al3+ is octahedral while hexaamminecobalt(lI) is tetrahedral. O B. …
Why is it better to use white vinegar rather than balsamic or apple cider vinega
Why is it better to use white vinegar rather than balsamic or apple cider vinegar for the titration? White vinegar has the higher percent acidity of all commercial vinegars. The c…
Why is it dangerous to store compressed gas cylinders in Places that could becom
Why is it dangerous to store compressed gas cylinders in Places that could become very hot? A balloon filled to its maximum capacity on a chilly night at a carnival pops without b…
Why is it important for you to: keep the beaker containing the mobile phase cove
Why is it important for you to: keep the beaker containing the mobile phase covered while preparing your chromatography paper and developing your chromatograms? remove the chromat…
Why is it important that a basis set for a wavefunction be complete and orthogon
Why is it important that a basis set for a wavefunction be complete and orthogonal? a. A complete, orthogonal basis set is used to guarantee that the wavefunction is not a functio…
Why is it important that the thermometer not touch the sides or bottom of the te
Why is it important that the thermometer not touch the sides or bottom of the test tube? a) It's important to not touch the sides of the test tube with the thermometer because tou…
Why is it important to add acetone slowly and dropwise to the mixture? Aldol Con
Why is it important to add acetone slowly and dropwise to the mixture? Aldol Condensation: Synthesis of Dibenzylideneacetone Step 1: Generation of an enolate in the presence of a …
Why is it important to collect temperature data over time, rather than using eit
Why is it important to collect temperature data over time, rather than using either the maximum temperature displayed on the calorimeter readout or the final calorimeter temperatu…
Why is it important to determine the percent recovery for chemical processes? In
Why is it important to determine the percent recovery for chemical processes? In addition to considering its importance in the chemical laboratory, consider its importance to a ch…
Why is it important to determine the percent recovery for chemical processes? In
Why is it important to determine the percent recovery for chemical processes? In addition to considering its importance in the chemical laboratory, consider its importance to a ch…
Why is it important to drink water immediately after taking aspirin? (How is the
Why is it important to drink water immediately after taking aspirin? (How is the stomach wall affected?) Sodium salicylate has been used as an analgesic. Draw the structure of thi…
Why is it important to drink water immediately after taking aspirin? Sodium sali
Why is it important to drink water immediately after taking aspirin? Sodium salicylate has been used as an analgesic. Draw the structure of this compound and show how you could pr…
Why is it important to increase the amount of solvent used if a reaction or puri
Why is it important to increase the amount of solvent used if a reaction or purification procedure is scaled up? (select all that apply) 1. To ensure that the larger amount of mat…
Why is it important to perform multiple experiment trials? After a science exper
Why is it important to perform multiple experiment trials? After a science experiment, you draw conclusions from your findings. In general, you decide whether the results su…
Why is it important to the NaOH solution each time before you use it? Would it b
Why is it important to the NaOH solution each time before you use it? Would it be better to use an unknown acid sample of a size that should require 10.000 ml or one that would re…
Why is it important to use a \"least squares fit\" line for a standard curve rat
Why is it important to use a "least squares fit" line for a standard curve rather than the plot of all data? (For the following curves.Concentration vs absorbances of a solution t…
Why is it impossible for the isotope 2/2 He to exist. Define nuclear binding ene
Why is it impossible for the isotope 2/2 He to exist. Define nuclear binding energy. mass nucleon defect and nucleon How does Einstein's equation, E = mc^2 to calculate nuclear bi…
Why is it necessary to extract the aqueous phase repeatedly with Dichloromethane
Why is it necessary to extract the aqueous phase repeatedly with Dichloromethane? What organic compounds remain in the product mixture after it has been filtered through the sodiu…
Why is it necessary to rinse the pipets with the solution to be used in them bef
Why is it necessary to rinse the pipets with the solution to be used in them before using the pipets? Why is it necessary to rinse out the cuvette with the solution to be used in …
Why is it necessary to separate ions through precipitation and dissolution react
Why is it necessary to separate ions through precipitation and dissolution reactions before identification of the ion can occur? If ions are not separated, horrible chemical react…
Why is it not a good idea to use a solution with very high OD in spectrophotomet
Why is it not a good idea to use a solution with very high OD in spectrophotometric determinations? Since the OD is directly proportional to the concentration of the substance tha…
Why is it not possible to definitively conclude how the electrons are structured
Why is it not possible to definitively conclude how the electrons are structured in the atom the results of the gold foil experiment? A) The deflection of a small percentage of th…
Why is it okay to wash down the sides of the Erlenmeyer flask with DI water duri
Why is it okay to wash down the sides of the Erlenmeyer flask with DI water during the titration, even though you are diluting the acid present? Calculate the following: a) How ma…
Why is it possible for a chemical reaction to occur spontaneously even though 3.
Why is it possible for a chemical reaction to occur spontaneously even though 3. for the reaction is positive? What is the pH of a 0.01M ammonia solution? Ka for ammonium ion is 5…
Why is it possible for a chemical reaction to occur spontaneously even though 3.
Why is it possible for a chemical reaction to occur spontaneously even though 3. for the reaction is positive? What is the pH of a 0.01M ammonia solution? Ka for ammonium ion is 5…
Why is it that if the edges of an undirected graph G can be grouped into two set
Why is it that if the edges of an undirected graph G can be grouped into two sets such that every vertex is incident to at most 1 edge from each set, then the graph is 2-colorable…
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