Chemistry concepts and calculations

Which of the following reagent(s) can be used to convert an ester to aldehyde DI

Which of the following reagent(s) can be used to convert an ester to aldehyde DIBALH / H_3O^+ NBS H_2 NaBH_4 / H_3O^+ LiAlH_4 / H_3O^+ Which of the following reagent(s) can be use…

Which of the following reagent(s) can be used to convert an ester to an aldehyde

Which of the following reagent(s) can be used to convert an ester to an aldehyde (A) DIBALH/H_3O_ (B) NBS (C) H_2 (D) NaBH_4/HO^- (E) LiAH_4/H_3O^- Which of the following reagent(…

Which of the following reagent(s) can be used to prepare benzoic acid (Ph-CO_ H)

Which of the following reagent(s) can be used to prepare benzoic acid (Ph-CO_ H) from toluene ? Fe/H_2SO_4 CH_3 COOH KMnO_4 NBs/H_2O HNO_3/H_2SO_4 Intermediate in the S_N 1 mechan…

Which of the following reagent(s) gives the reaction below (A) CH_3MgBr (B) CH_3

Which of the following reagent(s) gives the reaction below (A) CH_3MgBr (B) CH_3MgBr/H_2O^- (C) NaBH_4/H_2O^- (D) LiAlH_4/H_3O^- (E) BH_3/THF The ketone compound of the group is: …

Which of the following reagent(s) gives the reaction below (A) C_2H_5MgBr/H_5O^+

Which of the following reagent(s) gives the reaction below (A) C_2H_5MgBr/H_5O^+ (B) CH_3MgBr/H_3O^+ (C) NaBH/H_5O^- (D) LiAIH_/H_ O^- (E) (C_2H_5)_2CuLi/H)5O^- Product of the fol…

Which of the following reagent(s) gives the reaction below CH_3Cl CH_3Cl/AlCl_3

Which of the following reagent(s) gives the reaction below CH_3Cl CH_3Cl/AlCl_3 Cl_2/CH_3Cl CH_3OH/FeCl_3 CH_3Br/FeBr_3 Friedal-Craft alkyation reagent(s) C_2H_5Cl/AlCl_3 Cl_2/CH_…

Which of the following reagents is best suited for the oxidation of primary alco

Which of the following reagents is best suited for the oxidation of primary alcohols to aldehydes? A. CrO_3 B. Pyridine + CrO_3 + HCI (1:1:1) C. KMnO_4 D. K_2Cr_2O_7 + H_2SO_4 Arr…

Which of the following reagents will increase the solubility of PbF 2 ? Assume e

Which of the following reagents will increase the solubility of PbF2? Assume each reagent has a large concentration. A. NaF B. HCl C. NaOH D. Pb(NO3)2 I understand that A and D ar…

Which of the following reagents will not react as an electrophile in an aromatic

Which of the following reagents will not react as an electrophile in an aromatic substitution reaction? Which of the following reagents will not react as an electrophile in an aro…

Which of the following reagents would reduce carboxylic acids and esters int alc

Which of the following reagents would reduce carboxylic acids and esters int alcohols 1.LiAlH_4/2.H_3O^+ H_2/Raney Ni Na/NH_3 1.NaBH_4/2.H_3O^+ zn(Hg)/H^+ In electrophilic aromati…

Which of the following reagents(s) can be used to convert an ester to aldehyde D

Which of the following reagents(s) can be used to convert an ester to aldehyde DIBALH / h_3O^+ NBS H_2 NaBH / H_3O^+ LiALH_4 / H_3O^+ Which of the following reagents(s) can be use…

Which of the following reagents(s) gives the reaction below H_2SO_4 NBS H_2 NaBH

Which of the following reagents(s) gives the reaction below H_2SO_4 NBS H_2 NaBH_4 / H_3O^+ LiAlH_4 / H_3O^+ Product of the following reaction is; benzyl alcohol benzonic acid met…

Which of the following redox reactions do you expect to occur spontaneously in t

Which of the following redox reactions do you expect to occur spontaneously in the reverse direction? (Hint: The reactions are occurring under standard conditions (1 M for the aqu…

Which of the following refers to the ground-state electron configuration of an a

Which of the following refers to the ground-state electron configuration of an atom? Question 9 options: 1s12s1 [Kr]5p1 [Ne]3s13p2 [Ar]4s23d6 Save Question 10 (1 point) Which cent…

Which of the following refers to the ground-state electron configuration of an a

Which of the following refers to the ground-state electron configuration of an atom? Question 9 options: 1s12s1 [Kr]5p1 [Ne]3s13p2 [Ar]4s23d6 Save Question 10 (1 point) Which cent…

Which of the following regarding crystal field theory is NOT correct? a Crystal

Which of the following regarding crystal field theory is NOT correct? a Crystal field theory models the interaction between ligands and a central metal ion as primarily electrosta…

Which of the following regions in the electromagnetic spectrum corresponds to th

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the ongest wavelength? a. radio waves b. ultraviolet c. infrared d. visible 2. Wha…

Which of the following regions in the electromagnetic spectrum corresponds to th

Which of the following regions in the electromagnetic spectrum corresponds to the radiation with the ongest wavelength? a. radio waves b. ultraviolet c. infrared d. visible 2. Wha…

Which of the following relationships is false? A) As the activation energy of a

Which of the following relationships is false? A) As the activation energy of a reaction increases, its rate decreases. B) For a first order reactant, halving the concentration wi…

Which of the following represents Delta H in the following reaction? The Delta F

Which of the following represents Delta H in the following reaction? The Delta F (free energy change) for the conversion of A to B is predicted to be which of the following? Which…

Which of the following represents a pair of isotopes? Atomic Number Mass Number

Which of the following represents a pair of isotopes? Atomic Number     Mass Number I    7           16 II    8      16 I     17         35 II      17         37 I      7         …

Which of the following represents a palindrome sequence? ACCTTCCA ATTCCAAT GATTA

Which of the following represents a palindrome sequence? ACCTTCCA ATTCCAAT GATTAATC GGTAATCC NONE OF THE ABOVE WHICH OF THE FOLLOWING WHENPAIRED WITH its complementary strand have…

Which of the following represents a process that is always spontaneous? Delta H:

Which of the following represents a process that is always spontaneous? Delta H: positive Delta S: negative Delta H: negative Delta S: negative Delta H: negative Delta S: positive…

Which of the following represents a propagation step in the chloriatino of chlor

Which of the following represents a propagation step in the chloriatino of chloride (Ch_2Cl_2)? Rank the following radicats in order of decreasing stability (most stable to least …

Which of the following represents a rule for balancing a nuclear equation? I. Th

Which of the following represents a rule for balancing a nuclear equation? I. The total number of protons plus neutrons in the products and reactants must be the same II. The tota…

Which of the following represents a valid hypothesis? Metals tend to lose electr

Which of the following represents a valid hypothesis? Metals tend to lose electrons. Oxygen is a gas at room temperature. Neon does not react with oxygen. Lead is soft and malleab…

Which of the following represents an exothermic reaction? A(g) + B(g) rightarrow

Which of the following represents an exothermic reaction? A(g) + B(g) rightarrow 2C(g) delta H = + 100 kcal A(g) rightarrow B(g) + 33 kcal 50 kcal + 2A(g) rightarrow C(g) + D(s) B…

Which of the following represents the change in bond stability during this chemi

Which of the following represents the change in bond stability during this chemical process? CH4 + 2O2 2H2O + CO2 H = -889 kJ/mole A The products have stronger, more stable bonds …

Which of the following represents the change in electronic configuration that is

Which of the following represents the change in electronic configuration that is associated with the first ionization energy of Aluminum? A) [Ne]3s^13p^1 rightarrow [Ne]3s^1 + e^-…

Which of the following represents the electronic configuration of Ca^2*? [Ar]3s^

Which of the following represents the electronic configuration of Ca^2*? [Ar]3s^2 1s^22s^22p^63s^23d^64s^2 [Kr]4s^2 [Ne]3s^2 1s^22s^22p^23s^23p^6 Total combustion of butane (C_4H_…

Which of the following represents the equation for Delta H of crystal lattice en

Which of the following represents the equation for Delta H of crystal lattice energy? Br_2 (l) rightarrow Br_2 (g) Br_2 (g) rightarrow 2 Br(g) Br(g) + e- rightarrow Br^- (g) K^+ (…

Which of the following represents the integrated rate law for a zero-order react

Which of the following represents the integrated rate law for a zero-order reaction? [A]t - [A]o = - kt k = Ae(-Ea/RT) What data should be plotted to show that experimental concen…

Which of the following represents the reaction of formation of hexanal? 3C_2(s.

Which of the following represents the reaction of formation of hexanal? 3C_2(s. graphite) + 6H_2(g) +1/2o_2(g) right arrow C_6H_12 O(l) 6C(s. graphite) + 6H_2(g) + 1/2O_2(g) right…

Which of the following responses are true? 1. A buffer is formed when you add HC

Which of the following responses are true? 1. A buffer is formed when you add HCl to NH3 2. A buffer is formed when you add HCl to CH3COOH 3. The buffer with the greatest bufferin…

Which of the following responses correctly arranges the acids according to acid

Which of the following responses correctly arranges the acids according to acid strength? HIO > NIO_2 > HIO_2 HBr > HF > HCl HFO_2 > HClO_2> HIO_2 > HIO > …

Which of the following responses lists only the ionichydrides? I) LiH II) B2H6 I

Which of the following responses lists only the ionichydrides? I) LiH        II) B2H6              III) GeH4              IV) HCl         V) BaH2 a) I            b) I,V           …

Which of the following results in the largest increase (most positive charge) in

Which of the following results in the largest increase (most positive charge) in internal energy for a system? a) The system volume decreases and the surroundings get colder. b) T…

Which of the following sails arc/is basic? Na_2 SO_3 NaNO_2 NH_4 Cl 1 only 2 onl

Which of the following sails arc/is basic? Na_2 SO_3 NaNO_2 NH_4 Cl 1 only 2 only 3 only 1 & 2 2 & 3 Use the Ka values below to answer the questions that follow. Ka (HX_1)…

Which of the following salts is obtained from performing a reaction of a weak ac

Which of the following salts is obtained from performing a reaction of a weak acid and a strong base? a. NaNO_3 b. CaCl_2 c. NH_4Cl d. NaC_2H_3O_2 e. none of the above A strong ac…

Which of the following salts will produce a basic solution when added to pure wa

Which of the following salts will produce a basic solution when added to pure water? A) NaCl B) Li_2S C) CsI D) KHSO_4 E) NH_4Br A 1.0 M solution of a weak monoprotic acid is 0.40…

Which of the following scenarios could lead to the phenomenon known as self-igni

Which of the following scenarios could lead to the phenomenon known as self-ignition? Bacterial action in a haystack Lightening striking a house Faulty wiring in a home A clock us…

Which of the following seems the most reasonable pH of 0.02 M NH_3 solution? 6.1

Which of the following seems the most reasonable pH of 0.02 M NH_3 solution? 6.10 pH 7.00pH 10.25pH 12.31 pH Calculate pH of a solution with [OH^-] = 7.32 Times 10^5 M. 12.86 1.13…

Which of the following sequences of reagents will move the alcohol functional gr

Which of the following sequences of reagents will move the alcohol functional group from the tertiary position of 1 - methyl - 1 - cyclohexanol to a secondary position? A) 1) KOtB…

Which of the following series of spectral lines can be found in the infrared reg

Which of the following series of spectral lines can be found in the infrared region of the spectrum? a) Paschen series b) Pfund series c) Lyman series d) Brackett series e) Balmer…

Which of the following set of quantum numbers (ordered n , ? , m ? , m s ) are p

Which of the following set of quantum numbers (ordered n, ?, m?, ms) are possible for an electron in an atom? Check all that apply. Check all that apply. 2, 1, 3, 1/2 4, 2, 1, -1/…

Which of the following set of quantum numbers (ordered n, l, m_l, m_s) are possi

Which of the following set of quantum numbers (ordered n, l, m_l, m_s) are possible for an electron in an atom? -3, 2, 2,-1/2 4, 3, -2,1/2 2,1,0,-1 2,1,0,1/2 2, 2, 2,1/2 3,1,0,-1/…

Which of the following set of quantum numbers is not possible? Select one: a. n

Which of the following set of quantum numbers is not possible? Select one: a. n = 4, l = 3, ml = 3, ms = -1/2 b. n = 4, l = 2, ml = 2, ms = -1/2 c. n = 2, l = 1, ml = 0, ms = 1/2 …

Which of the following sets of conditions favors maximum solubility of solute in

Which of the following sets of conditions favors maximum solubility of solute in solvent? The intermolecular forces between solute and solvent molecules are much stronger than the…

Which of the following sets of conditions favors maximum solubility of solute in

Which of the following sets of conditions favors maximum solubility of solute in solvent? The intermolecular forces between solute and solvent molecules are much stronger than the…

Which of the following sets of conditions most favors the E1 mechanism? A) when

Which of the following sets of conditions most favors the E1 mechanism? A) when the alkyl halide tertiary and the base is a weak base B) when alkyl halide is strong base is tertia…