Chemistry concepts and calculations

1. Which of the following is the predominant form of serine at physiological pH?

1. Which of the following is the predominant form of serine at physiological pH? A) I B) II C) III D) IV E) V 2. Which of the following peptides is not cleaved by trypsin? A) Gly-…

1. Which of the following is true about chemical equilibrium? a) b) c) d) e) Iti

1. Which of the following is true about chemical equilibrium? a) b) c) d) e) Itis microscopically and macroscopically static. Itis microscopically and macroscopically dynamic. Iti…

1. Which of the following is true about pi bonds? true A. limits rotation about

1. Which of the following is true about pi bonds? true A. limits rotation about the bond axis B. C.Involves 2 s orbitals D. occurs on the bond axis involves es end-to-end overlap …

1. Which of the following is true of a cation? A) it has equal numbers of proton

1. Which of the following is true of a cation? A) it has equal numbers of protons and electrons B) it has fewer protons than electrons C) it has more protons than electrons D) the…

1. Which of the following is true of a cation? A) it has equal numbers of proton

1. Which of the following is true of a cation? A) it has equal numbers of protons and electrons B) it has fewer protons than electrons C) it has more protons than electrons D) the…

1. Which of the following is true of a cation? A) it has equal numbers of proton

1. Which of the following is true of a cation? A) it has equal numbers of protons and electrons B) it has fewer protons than electrons C) it has more protons than electrons D) the…

1. Which of the following is true of a cation? A) it has equal numbers of proton

1. Which of the following is true of a cation? A) it has equal numbers of protons and electrons B) it has fewer protons than electrons C) it has more protons than electrons D) the…

1. Which of the following is true regarding electromagnetic radiation? A. As ene

1. Which of the following is true regarding electromagnetic radiation? A. As energy increases, wavelength and frequency increase. B. As energy increases, wavelength and frequency …

1. Which of the following is/are a reduced compound/s NAD+ NADH FAD FADH2 Both a

1. Which of the following is/are a reduced compound/s NAD+ NADH FAD FADH2 Both a and c Both b and d Both b an c 2. Which of these second messengers signals the release of Ca+ ions…

1. Which of the following mass spectral phenomena would indicate the presence of

1. Which of the following mass spectral phenomena would indicate the presence of an odd number of nitrogen atoms in a molecule? a) the molecular ion peak had an odd number for its…

1. Which of the following mixtures are buffers and why? If it is a buffer, write

1. Which of the following mixtures are buffers and why? If it is a buffer, write an equilibrium equation for the conjugate acid/base pair. a. KF / HF b. NH3 / NH4Br c. KNO3 / HNO3…

1. Which of the following mixtures are buffers and why? If it is a buffer, write

1. Which of the following mixtures are buffers and why? If it is a buffer, write an equilibrium equation for the conjugate acid/base pair. a. KF / HF b. NH3 / NH4Br c. KNO3 / HNO3…

1. Which of the following molecular formulas corresponds to magnesium hydroxide?

1. Which of the following molecular formulas corresponds to magnesium hydroxide? (5 points) a. Mg(OH) b. Mg(OH)s c. Mn(OH)2 d. MgOH 2. Which of the following molecular formulas co…

1. Which of the following orbital diagrams violates the Pauli exclusion principl

1. Which of the following orbital diagrams violates the Pauli exclusion principle? A. B. C. D. E. Which of the following have one or more filled d subshells in their ground state …

1. Which of the following pairs are both electrolytes? NaOH and SO2 B. H2SO4 and

1. Which of the following pairs are both electrolytes? NaOH and SO2   B. H2SO4 and NH4Cl   C. CH3OH and C2H5OH D. HNO2 and NO2   E. CO2 and H2CO3 2. Which of the following is a we…

1. Which of the following piece of glassware is appropriate for a reaction run a

1. Which of the following piece of glassware is appropriate for a reaction run at reflux? a. RBF b. Distillation head c. Erlenmeyer flask d. Beaker 2. True or False: The waste bot…

1. Which of the following proceeds with syn addition? a. Hydroboration of an alk

1. Which of the following proceeds with syn addition? a. Hydroboration of an alkene b. hydrobromination of an alkene c. radical bromination of an alkane d. contra-Markovnikof hydr…

1. Which of the following proceeds with syn addition? a. Hydroboration of an alk

1. Which of the following proceeds with syn addition? a. Hydroboration of an alkene b. hydrobromination of an alkene c. radical bromination of an alkane d. contra-Markovnikof hydr…

1. Which of the following proceeds with syn addition? a. hydroboration of an alk

1. Which of the following proceeds with syn addition? a. hydroboration of an alkene. b. hydrobromination of an alkene c. radical bromination of an alkane d. contra-markovnikof hyd…

1. Which of the following proceeds with syn addition? a. hydroboration of an alk

1. Which of the following proceeds with syn addition? a. hydroboration of an alkene. b. hydrobromination of an alkene c. radical bromination of an alkane d. contra-markovnikof hyd…

1. Which of the following processes have a Q value at equilibrium which increase

1. Which of the following processes have a Q value at equilibrium which increases as the temperature increases a) mixing of H2SO4 and H2O b) dissolving of O2(g) in H2O c) 2Cl(g) -…

1. Which of the following protein purification techniques is properly paired wit

1. Which of the following protein purification techniques is properly paired with its description? A) Fractionation: sodium dodecyl sulfate is used to fractionate proteins based o…

1. Which of the following ranks as one of the most important factors governing d

1. Which of the following ranks as one of the most important factors governing drug disposition? a. Bioavailability b. Volume of distribution c. Clearance d. Elimination half-life…

1. Which of the following reactions absorbs heat from the surroundings in order

1. Which of the following reactions absorbs heat from the surroundings in order to proceed to completion?    I. CO (g) +1/2 O2 (g) ----> CO2 (g)    II. Al2O3 (s)-----> 2Al (…

1. Which of the following reacts fastest with NaOH in ethanol by S 2 mechanism.

1. Which of the following reacts fastest with NaOH in ethanol by S 2 mechanism. (A) CH,CI (B) CH,Br (C) CHl (D) CHCHCI (E) CH,CH, A) Fe/H,SO (B) CH,COOH (C) KMno (D) NBS/HO (E) HN…

1. Which of the following reagent(s) can be used to prepare a mixture of o and p

1. Which of the following reagent(s) can be used to prepare a mixture of o and p-nitro toluene from toluene      (A) HNO2      (B) HNO3      (C) HNO3/Fe      (D) HNO3/H2SO4       …

1. Which of the following regions of the electromagnetic spectrum has the lowest

1. Which of the following regions of the electromagnetic spectrum has the lowest frequency? a. X-ray b, gamma ray c, ultraviolet d, infrared e, visible 2. Which of the following s…

1. Which of the following represents a 0.100 mol/L KCI solution? a. b. c. d. 100

1. Which of the following represents a 0.100 mol/L KCI solution? a. b. c. d. 1000 mL of solution containing 74.6 g KCI 100 g KCI in 1.00 L of solution 5.00 L of solution containin…

1. Which of the following represents a qualitative observation? a) The substance

1. Which of the following represents a qualitative observation? a) The substance is a powder and is red in colour. b) The mass of the metal is 3.57 g. c) The object occupies a vol…

1. Which of the following represents the most stable conformation of trons-1,3-d

1. Which of the following represents the most stable conformation of trons-1,3-dimethylcyclohexane? d) none of the preceding 2. Which of the following represents the most stable c…

1. Which of the following set of quantum numbers (ordered n, , m, ms) are possib

1. Which of the following set of quantum numbers (ordered n, , m, ms) are possible for an electron in an atom? Check all that apply. a. 3, 2, 2, -1/2 b. -1, 0, 0, -1/2 c. 3, 2, 1,…

1. Which of the following should have the lowest boiling point? a. C 5 H 12 b. C

1. Which of the following should have the lowest boiling point? a. C5H12 b. C6H14 c. C8H18 d. C10H22 e. C12H26 2. Select the pair of substances in which the one with the higher va…

1. Which of the following solutions will not form a precipitate when added to 0.

1. Which of the following solutions will not form a precipitate when added to 0.10 M BaCl2? A- 0.10 M AgNO3 B- 0.10 M LiNO3 C- 0.10K2SO4 2. What is the oxidation number change for…

1. Which of the following solvents would be the best choice to extract a polar o

1. Which of the following solvents would be the best choice to extract a polar organic compound from an aqueous solution? Acetonitrile                 Dimethylformamide           …

1. Which of the following species contains a triple bond? a) HCN b) H 2 CO c) CO

1. Which of the following species contains a triple bond? a) HCN b) H2CO c) CO2 d) N2O4 e) C2O42? 5. Which two species are isoelectronic (identical electron configurations)? a) Na…

1. Which of the following species would you expect show up in electron impact ma

1. Which of the following species would you expect show up in electron impact mass spectrometry? Circle the appropriate answer(s). (2 points) ONH2 CH3 C CH3 H-CEC-H CH3 H3C CH3 NH…

1. Which of the following species would you expect show up in electron impact ma

1. Which of the following species would you expect show up in electron impact mass spectrometry? Circle the appropriate answer(s). (2 points) ONH2 CH3 C CH3 H-CEC-H CH3 H3C CH3 NH…

1. Which of the following statements about Molecular Configuration and Molecular

1.      Which of the following statements about Molecular Configuration and Molecular Conformation are True (a) Molecular Configuration can be changed most easily by bond rotation…

1. Which of the following statements about the mechanism of the Diels-Alder reac

1. Which of the following statements about the mechanism of the Diels-Alder reaction is true? A) Three pi bonds break; two sigma bonds and one pi bond form. B) Three pi bonds brea…

1. Which of the following statements are NOT valid? LA) double menu == 4.9; B) i

1. Which of the following statements are NOT valid? LA) double menu == 4.9; B) int return; CIC) int value = 5.0; OD) (menu == 7) OE) int x = 2; 2. Place the following statements i…

1. Which of the following statements are TRUE Dynamic equilibrium occurs when th

1. Which of the following statements are TRUE Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction. The equilibrium constant fo…

1. Which of the following statements are TRUE Dynamic equilibrium occurs when th

1. Which of the following statements are TRUE Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction. The equilibrium constant fo…

1. Which of the following statements are true regarding muscle glycogen. There a

1. Which of the following statements are true regarding muscle glycogen. There are multiple correct answers. Low carbohydrate diets decrease ones ability to recover from exercise.…

1. Which of the following statements best describes the arrangement of the bases

1. Which of the following statements best describes the arrangement of the bases? a. Which of the following statements best describes the location of the water molecules in the cr…

1. Which of the following statements define metal coordination compounds. (Selec

1. Which of the following statements define metal coordination compounds. (Select ALL that apply). Select one or more: a. A metal-containing compound where small molecules surroun…

1. Which of the following statements is TRUE concerning the solubility of zinc c

1. Which of the following statements is TRUE concerning the solubility of zinc carbonate? a. Zinc carbonate would be more soluble in a solution of zinc chloride? b. Zinc carbonate…

1. Which of the following statements is true for ideal gases, but is not always

1. Which of the following statements is true for ideal gases, but is not always true for real gases? Choose all that apply. A. Replacing one gas by another under the same conditio…

1. Which of the following statements is true regarding the different phases of m

1. Which of the following statements is true regarding the different phases of matter? I. The particles in a solid are very close to each other move freely. Il. The particles in a…

1. Which of the following statements is true? a)An accident involving transport

1. Which of the following statements is true? a)An accident involving transport of hazardous materials where a fatality is involved must be reported as soon as possible, but withi…

1. Which of the following statements is/are true? A.1 only B.2 only C.3 only D.1

1. Which of the following statements is/are true? A.1 only B.2 only C.3 only D.1 and 2 E.2 and 3 2. Which of the following species has a bond order of 2.5? A.NO– B.CO C.NO+ D.O2+ …