Chemistry concepts and calculations
117302 questions • Page 2050 / 2347
Which of the following statements regarding spontaneous changes is false? Sponta
Which of the following statements regarding spontaneous changes is false? Spontaneity is favored when heat is released. Spontaneity is favored when the dispersal of matter is incr…
Which of the following statements regarding spontaneous processes are true? a. S
Which of the following statements regarding spontaneous processes are true? a. Spontaneous processes are exothermic. b. Spontaneous processes proceed without outside intervention …
Which of the following statements regarding the recharging of a battery is NOT c
Which of the following statements regarding the recharging of a battery is NOT correct? a. Electrical energy is used to drive the redox reaction in the nonspontaneous direction. b…
Which of the following statements regarding the reversible binding of ligands to
Which of the following statements regarding the reversible binding of ligands to proteins is not true? Proteins generally bind only specific ligands. Sometimes, ligand binding cau…
Which of the following statements regarding thin layer chromatography are TRUE?
Which of the following statements regarding thin layer chromatography are TRUE? The Rf value will change if the adsorbent material is changed. Covering the sample jar is done to s…
Which of the following statements regarding thin layer chromatography are TRUE?
Which of the following statements regarding thin layer chromatography are TRUE? - Partition chromatography separates compounds based on how they distribute themselves between the …
Which of the following statements regarding thin layer chromatography are TRUE?
Which of the following statements regarding thin layer chromatography are TRUE? - Partition chromatography separates compounds based on how they distribute themselves between the …
Which of the following statements regarding thin layer chromatography are TRUE?
Which of the following statements regarding thin layer chromatography are TRUE? The Rf value will change if the adsorbent material is changed. Covering the sample jar is done to s…
Which of the following statements registers a panel object aPanel as a listener
Which of the following statements registers a panel object aPanel as a listener for a button variable aButton? Question 15 options: addActionListener(aPanel); aButton.addActionEve…
Which of the following statements related to adding increasing amounts of ethyl
Which of the following statements related to adding increasing amounts of ethyl acetate to toluene during column chromatography of 2 and 4 nitroaniline with silica gel are true. …
Which of the following statements relating to molecular orbital (MO) theory is i
Which of the following statements relating to molecular orbital (MO) theory is incorrect?? a. Combination of two 2p orbitals may result in either sigma or pi MOs. b. Combination o…
Which of the following statements relative to IUPAC nomenclature for alkens and
Which of the following statements relative to IUPAC nomenclature for alkens and cycloalkenes is incorrect? A. The position of a double bond in a parent chain is given by a single …
Which of the following statements statement about internal energy E. is fable? a
Which of the following statements statement about internal energy E. is fable? a. Its absolves value cambium be determined b. In some processes delta E = q + w c. Delta E is posit…
Which of the following statementsis a valid conclusion from the Heisenberg uncer
Which of the following statementsis a valid conclusion from the Heisenberg uncertainty principle? a) Particles can exhibit wavelikebehavior. b) The orbits proposed by …
Which of the following statments refers most directly toenthalpy? (a) In an endo
Which of the following statments refers most directly toenthalpy? (a) In an endothermic reaction, the sign of H isnegative (b) Potential energy decreases in an exothermic reaction…
Which of the following stepwise reactions will carry out the conversion of D to
Which of the following stepwise reactions will carry out the conversion of D to E? 1.OsO_4; 2. NaHSO_3, H_3O 1. mCPBA; 2. H_2SO_4, H_2O 2. mCPBA; 2. NaOH, H_2O both (b) and (c) wi…
Which of the following structures have 1+ formal charge on sulfur atom? Why He_2
Which of the following structures have 1+ formal charge on sulfur atom? Why He_2 molecule does not exist? A) Bonding molecular orbital of He_2 is filled with two electrons B) He_2…
Which of the following structures have the correct common name? Please help me a
Which of the following structures have the correct common name? Please help me answer all questions on this post, thank you. 21. Which of the following structures have the co comm…
Which of the following structures is aromatic? Assume planarity of the x network
Which of the following structures is aromatic? Assume planarity of the x network Classify cyclopentadienyl cation aromatic antiaromatic nonaromatic Assume planarity of the x netwo…
Which of the following studies falls under the category of Earth system science?
Which of the following studies falls under the category of Earth system science? A single mountain range An isolated population of animals The atmosphere Studying the rain, rivers…
Which of the following subshells has the LOWEST energy? 5s A ground-state atom o
Which of the following subshells has the LOWEST energy? 5s A ground-state atom of manganese has ________ unpaired electrons and is ________. The representative elements are those …
Which of the following substances are nonpolar covalent? CO NCl3 CaCO3 BaO Na2SO
Which of the following substances are nonpolar covalent? CO NCl3 CaCO3 BaO Na2SO4 Cl2 POBr3 HBr Which of the following substances are largely ionic? CaCO3 NCl3 POBr3 Cl2 CO HBr B…
Which of the following substances has London force as its only intermolecular fo
Which of the following substances has London force as its only intermolecular force? CH_3 OH Ne CuCl_2 Which of the following molecules has the highest boiling point? H_2 Br_2 N_2…
Which of the following substances has the lowest boiling point? C12H16 CH2Br2 Br
Which of the following substances has the lowest boiling point? C12H16 CH2Br2 Br2 ICl How much energy in kJ will it take to melt 5.0 g of frozen Ar at -190o C? T/F if methane was …
Which of the following substances is most likely to be a gas at room temperature
Which of the following substances is most likely to be a gas at room temperature and atmospheric pressure? Answer A. I2 B. Ar …
Which of the following substances is most likely to be a gas at room temperature
Which of the following substances is most likely to be a gas at room temperature and atmospheric pressure? Answer A. Ni B. CCl4 …
Which of the following substances is most likely to be a molecular compound? A s
Which of the following substances is most likely to be a molecular compound? A solid that dissolves easily in water. A powdery substance that melts easily on your stovetop. A subs…
Which of the following substances is never a Bronsted-Lowry base in an aqueous s
Which of the following substances is never a Bronsted-Lowry base in an aqueous solution? potassium hydroxide, NaOH_(g) sodium hydrogen phosphate, Na_2HPO_4(s) sodium phosphate, Na…
Which of the following substances presents the greatest health hazard in the lab
Which of the following substances presents the greatest health hazard in the laboratory A. ethanol B. glycine C. lead acetate D. cysteine Approximately how much 0.1 M NaOH would b…
Which of the following substances would have the highest critical temperature? A
Which of the following substances would have the highest critical temperature? A. CH3Cl B. C2H6 C. F2 D. H2 E. CO2 The molar heats of sublimation and fusion of iodine are 62.3 kJ/…
Which of the following substances would you expect to be a weak electrolyte? Wha
Which of the following substances would you expect to be a weak electrolyte? What is the correct definition of a weak electrolyte? A weak electrolyte is a substance that fully dis…
Which of the following substituents is a significant resonance acceptor? -OCH_3
Which of the following substituents is a significant resonance acceptor? -OCH_3 -NH_3^+ -NH_2 -NO_2 CH_3 Reserveratrol (the structure shown below) found in red wine has been shown…
Which of the following techniques can be used to be separate enantiomers? Thin l
Which of the following techniques can be used to be separate enantiomers? Thin layer chromatography polarimetry distillation Resolution as temporary diastereomers Enantiomers can …
Which of the following techniques can be used to be separate enantiomers? Thin l
Which of the following techniques can be used to be separate enantiomers? Thin layer chromatography polarimetry distillation Resolution as temporary diastereomers Enantiomers can …
Which of the following terms best describes a diet- alder reaction? a (2+2) phot
Which of the following terms best describes a diet- alder reaction? a (2+2) photo chemically allowed reaction d) an electrophilic addition reaction 2. The Diels*Alder reaction is …
Which of the following terms best describes the reactive nature of a Grignard re
Which of the following terms best describes the reactive nature of a Grignard reagent? electrophile carbocation nucleophile free radical When an ketone is treated with LiAlH_4 fol…
Which of the following terms best describes the side chain of valine? A) acidic
Which of the following terms best describes the side chain of valine? A) acidic B) basic C) charged, polar D) uncharged, polar E) nonpolar Which of the following best describes th…
Which of the following terms can be used to describe an electochemical cell in w
Which of the following terms can be used to describe an electochemical cell in which a spontaneous chemical reactions generates an electric current 2) which cell invalues a nonspo…
Which of the following terms refers to intentionally adding impurities to a meta
Which of the following terms refers to intentionally adding impurities to a metal? [a]. Alloying [b] Allotroping [c] Doping [d] Carburizing [e] Solutionizing Which of the followin…
Which of the following three scenarios poses the most serious threat to the pers
Which of the following three scenarios poses the most serious threat to the person's health? 1. A lactose-intolerant person drinks a solution of galactose. 2. A lactose-intolerant…
Which of the following three scenarios poses the most serious threat to the pers
Which of the following three scenarios poses the most serious threat to the person's health? 1. A lactose-intolerant person drinks a solution of galactose. 2. A lactose-intolerant…
Which of the following titrations will have the highest pH at the equivalence po
Which of the following titrations will have the highest pH at the equivalence point (assuming identical initial concentrations of all reactants)? a) Titration of C_6H_2NH_2 (a wea…
Which of the following transformations represent an increase in the entropy of t
Which of the following transformations represent an increase in the entropy of the system. Choose all that apply 31 g C2H5OH (liquid, 171K)31 g C2H5OH (liquid, 340K) 3 mol Ne (0.5…
Which of the following transformations represent an increase in the entropy of t
Which of the following transformations represent an increase in the entropy of the system. Choose all that apply 31 g C2H5OH (liquid, 171K)31 g C2H5OH (liquid, 340K) 3 mol Ne (0.5…
Which of the following transitions (in a hydrogen atom) represents emission of t
Which of the following transitions (in a hydrogen atom) represents emission of the highest frequency light? Answer n = 5 to n= 4 n = 4 to n = 1 n = 3 to n = 2 n = 2 to n = 1 n = 6…
Which of the following triglycerides is most likely to be an oil? Question 6 opt
Which of the following triglycerides is most likely to be an oil? Question 6 options: one which contains relatively short chain unsaturated fatty acids one which contains relative…
Which of the following tripeptides would be expected to be the most hydrophobic?
Which of the following tripeptides would be expected to be the most hydrophobic? Lys-Tyr-Gly Lys-Tyr-AIa Gly-Tyr-AIa Asp-Tyr-Ala Asp-Tyr-Gly Ion exchange chromatography utllizes o…
Which of the following tripeptides would be expected to be the most hydrophobic?
Which of the following tripeptides would be expected to be the most hydrophobic? Lys-Tyr-Gly Lys-Tyr-AIa Gly-Tyr-AIa Asp-Tyr-Ala Asp-Tyr-Gly Ion exchange chromatography utllizes o…
Which of the following two amides will react more readily with a nucleophile and
Which of the following two amides will react more readily with a nucleophile and why? 1, becaUse it is less hindered. 2, becaUse it is less hindered. 1, becaUse it is more straine…
Which of the following two conformations of cis -1-chloro-2-methylcyclohexane is
Which of the following two conformations of cis-1-chloro-2-methylcyclohexane is more stable? Use the strain energy increments in McMurry Table 4.1 to estimate the energy differenc…
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