Chemistry concepts and calculations

Which of the following accurately portrays a phase diagram? Which of the followi

Which of the following accurately portrays a phase diagram? Which of the following accurately portrays a phase diagram? Any temperature above the liquid-solid line on a phase diag…

Which of the following accuratley lists compounds in order ofincreasing solubili

Which of the following accuratley lists compounds in order ofincreasing solubility in water? a) LiCl, Br2, O2, methanol(CH3OH) b) methanol (CH3OH), LiCl, O2,Br2 c) O2, Br2, LiCl, …

Which of the following acids (listed with K_a values and would form a buffer wit

Which of the following acids (listed with K_a values and would form a buffer with a acids buffer with a pH et 6.34? A) HI, Ka B) H C) HP, Ka = 5.93 times 10^-1 D) None of the abov…

Which of the following acids is the stronger, boric acid, pKa = 9.0 or acetic ac

Which of the following acids is the stronger, boric acid, pKa = 9.0 or acetic acid, pKa = 4.6? Explain your answer with proper justification. Calculate the pH of a 0.2 M acetate b…

Which of the following acids will have the weakest conjugate base? Acetone, pk_a

Which of the following acids will have the weakest conjugate base? Acetone, pk_a = 1.8 Acetylacetone, pk_a = 10 Acetic acid, pk_a = 4.7 HCN, pk_a = 9.2 Complete the following by c…

Which of the following actions would change the measured cell potential? A) incr

Which of the following actions would change the measured cell potential? A) increasing the pH in the cathode compartment B) lowering the pH in the cathode compartment C) increasin…

Which of the following actions would decrease the solubility of the solute ? A)

Which of the following actions would decrease the solubility of the solute ? A) powdered drink mix is added to cold water B) Salt is added to a pot of boiling water C) an open can…

Which of the following addition polymers results from the reaction below? A) [=C

Which of the following addition polymers results from the reaction below? A) [=CF-CF=]_n B) [CF_3-CF_3]_n C) [-CF_2-CH=CHCF_2]_n D) [-CF_2-CF_2-]_n E) [-CF_2=CF_2-]_n Which of the…

Which of the following alcohols is found in alcohol beverages? a. methanol b. et

Which of the following alcohols is found in alcohol beverages? a. methanol     b. ethanol        c. propanol      d. Butanol Which of the following alcohols is also called wood al…

Which of the following alcohols would not be oxidized by chromic acid reagent wi

Which of the following alcohols would not be oxidized by chromic acid reagent within 5 seconds: 1-pentanol, cyclohexanol, 2-methyl-1-propanol, 2-methyl-2-butanol? Do primary or te…

Which of the following ale allowed resonance forms of NCS^-? I [N = C - S]^- and

Which of the following ale allowed resonance forms of NCS^-? I [N = C - S]^- and [ N = C = S]^- (N C - S]^- and [N = C = S]^- [N = C - S]^- and [ S - C = N]^- The number of sp^2 h…

Which of the following alkenes are terminal alkenes? Which of the following alke

Which of the following alkenes are terminal alkenes? Which of the following alkenes are internal alkenes? Which of the statements about the properties of the carbon-carbon double …

Which of the following alkenes exhibit E - Z isomerism? I. CM_3 CH_2 CH = CH CH_

Which of the following alkenes exhibit E - Z isomerism? I. CM_3 CH_2 CH = CH CH_2 CH_3 II. (CH_2)_2 C = CH CH_3 III. CH_3 CH_2 CH = CHBr IV. H_2 C = CH CH_2 CH (CH_3)_2 A) I and I…

Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropcne [CICHCH

Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropcne [CICHCHCH_3] II. 2-chIoropropcne [CH_2CCICH_3] III. 3-chloropropene [CH_2CHCH_2CI] A) only I B) I and II C…

Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropene [CICHCH

Which of the following alkenes exhibit E-Z isomerism? I. 1-chloropropene [CICHCHCH_3) II. 2-chloropropene |CH_2CCICH_3] III 3-chloropropcne [CH_2CHCH_2CI) A) II and III B) only I …

Which of the following alkenes exhibit E-Z isomerism? I. l-chloropropene[ClCHCHC

Which of the following alkenes exhibit E-Z isomerism? I. l-chloropropene[ClCHCHCH_3] II. 2-chloropropene [CH_2CCICH_3] III. 3-chloropropene [CH_2CHCH_2Cl] A) only I B) I and II C)…

Which of the following alkyl bromides reacts the slowest with NaSCH_3 in DMF? 1

Which of the following alkyl bromides reacts the slowest with NaSCH_3 in DMF? 1 2 3 4 What is the major organic product obtained from the following reaction? 1 2 3 4 What is the m…

Which of the following alkyl halides undergoes the fastest S_s2reaction with sod

Which of the following alkyl halides undergoes the fastest S_s2reaction with sodium cyanide, NaCN? methyl halides ethyl iodide 2-iodopropane tert-butyl iodide Which of the followi…

Which of the following alkyl halides will undergo the low it so reaction? Rank t

Which of the following alkyl halides will undergo the low it so reaction? Rank the following compounds from most to least reactive in an S_n1 reaction. l>IV>ll>lll ll>…

Which of the following alkyle bromides is likely to undergo rearrangement by a 1

Which of the following alkyle bromides is likely to undergo rearrangement by a 1,2- methyl shift? Which of the following carbocations docs not rearrange? Give the name(s) of the p…

Which of the following alpha-amino acids is a diamino-monocarboxylic acid? (a) L

Which of the following alpha-amino acids is a diamino-monocarboxylic acid? (a) Leucine (b) Arginine (c) gamma-Carboxyglutamic acid? (d) None of the above Which of the following st…

Which of the following amino acids contains two stereocenters? isoleucinc prolin

Which of the following amino acids contains two stereocenters? isoleucinc proline phenylalanine Glutamine What are the R/S designations of the two stereocenters of isolcucine? 2R.…

Which of the following amino acids contains two stereocenters? isoleucinc prolin

Which of the following amino acids contains two stereocenters? isoleucinc proline phenylalanine Glutamine What are the R/S designations of the two stereocenters of isolcucine? 2R.…

Which of the following anions is a weaker base than H_2O? fluoride bromide nitra

Which of the following anions is a weaker base than H_2O? fluoride bromide nitrate periodate Suppose you had aqueous solution of the following salts, what of the will be base of t…

Which of the following answers completes the sentence correctly? Uncouplers such

Which of the following answers completes the sentence correctly? Uncouplers such as dinitrophenol (DNP) or thermogenin uncouple electron transport and phosphorylation by A. Inhibi…

Which of the following appears to be an IR spectrum of 2-bromo-1- methylcyclohex

Which of the following appears to be an IR spectrum of 2-bromo-1- methylcyclohexanol? (frequencies are indicated in a mare readable font size below the spectra) Which of the follo…

Which of the following aqueous solutions are good buffer systems? . 0.17 M aceti

Which of the following aqueous solutions are good buffer systems? . 0.17 M acetic acid + 0.10 M sodium acetate 0.11 M sodium hydroxide + 0.26 M sodiumbromide 0.34 M ammonia + 0.39…

Which of the following aqueous solutions are good buffer systems? . 0.19 M sodiu

Which of the following aqueous solutions are good buffer systems? . 0.19 M sodium hydroxide + 0.26 M sodium bromide 0.22 M hydrochloric acid + 0.17 M potassium chloride 0.11 M nit…

Which of the following aqueous solutions are good buffer systems? . 0.31 M ammon

Which of the following aqueous solutions are good buffer systems? . 0.31 M ammonium bromide + 0.39 M ammonia 0.31 M nitrous acid + 0.25 M potassium nitrite 0.21 M perchloric acid …

Which of the following aqueous solutions are good buffer systems? 0.33 M ammonia

Which of the following aqueous solutions are good buffer systems? 0.33 M ammonia + 0.30 M barium hydroxide 0.36 M barium nitrate + 0.27 M calcium nitrate 0.27 M perchloric acid + …

Which of the following aqueous solutions are good buffer systems? [YOU CAN PICK

Which of the following aqueous solutions are good buffer systems? [YOU CAN PICK MORE THAN ONE] 0.31 M ammonium bromide + 0.32 M ammonia 0.21 M hypochlorous acid + 0.12 M sodium hy…

Which of the following aqueous solutions has the highest osmotic pressure at 25

Which of the following aqueous solutions has the highest osmotic pressure at 25 Degree C (assume 100% dissociation for all solution ionic compounds) ? 33. If 14.2 g of AI (NO3)3 d…

Which of the following aqueous solutions should have the highest boiling point?

Which of the following aqueous solutions should have the highest boiling point? Answer                              A. 1.0 m MgCl2                 B. All should have the same boil…

Which of the following are STRONG acids? a nitric acid phosphoric acid C. hydroi

Which of the following are STRONG acids? a nitric acid phosphoric acid C. hydroiodic acid d hydrofluoric acid e sulfurous acid f citric acid g perchloric acid h. acetic acid QUEST…

Which of the following are TRUE about the pH changes? Select one: a. A pH change

Which of the following are TRUE about the pH changes? Select one: a. A pH change from 3.0 to 5.0 reflects a decrease in the proton concentration ([H+]) by a factor of 100. b. A pH…

Which of the following are TRUE about the pH changes? Select one: a. A pH change

Which of the following are TRUE about the pH changes? Select one: a. A pH change from 3.0 to 5.0 reflects a decrease in the proton concentration ([H+]) by a factor of 100. b. A pH…

Which of the following are TRUE for steroid hormones in signaling but NOT TRUE f

Which of the following are TRUE for steroid hormones in signaling but NOT TRUE for amino acid derivatives and polypeptides in signaling? i.e. What are the differences between ster…

Which of the following are TRUE of X-inactivation? (Choose all that are true) a.

Which of the following are TRUE of X-inactivation? (Choose all that are true) a. In normal individuals, X-inactivation is random - the X from the male parent or female parent are …

Which of the following are TRUE? Choose ALL answers that apply. For a pure speci

Which of the following are TRUE? Choose ALL answers that apply. For a pure species, coexisting liquid and vapour phases at equilibrium have the same T and P, but different fugacit…

Which of the following are all ortho/para directing and activating substituents

Which of the following are all ortho/para directing and activating substituents in aromatic electrophilic substitution reactions? Select one: a. aldehyde group, amino group, chlor…

Which of the following are allowed resonance forms of NCS^-? I [N = C - S:]- and

Which of the following are allowed resonance forms of NCS^-? I [N = C - S:]- and [N = C - S:]^- II [N = C - S:]^- and [:N =C - S:]^- III (N = C - S:)- and [S - C = N:]^- A) only I…

Which of the following are constitutional isomers? A) I, II, and III B) I, III,

Which of the following are constitutional isomers? A) I, II, and III B) I, III, and IV C) only I and III D) all are constitutional isomers The formal charges on the nitrogen and o…

Which of the following are correct about nodal planes in molecular orbitals? The

Which of the following are correct about nodal planes in molecular orbitals? There may have more than one correct answers. Pictures of sigma and pi bonding and antibonding molecul…

Which of the following are correct equivalent values ? For any solutions specifi

Which of the following are correct equivalent values ? For any solutions specified, assume they have the density ofwater. There may be more than one correct. a) 0.050 mg/L = 50 pp…

Which of the following are correct equivalentvalues ? For any solutions specifie

Which of the following are correct equivalentvalues ? For any solutions specified, assume they havethe density of water. a) 0.050 mg/L = 50 ppm b) 3.0 ppm = 3.0 g solute / 106 gso…

Which of the following are correct for each question? 1) The 1s orbital is the s

Which of the following are correct for each question? 1) The 1s orbital is the smallest in __________________atoms?    a.Cl    b.F    c.I    d.the 1s orbital in all the above atom…

Which of the following are correct for zero-order reactions? Check all that appl

Which of the following are correct for zero-order reactions? Check all that apply. View Available Hint(s) Check all that apply. The concentration of the reactants changes nonlinea…

Which of the following are correct statements? I. the alpha decay of 242Pu produ

Which of the following are correct statements? I. the alpha decay of 242Pu produces 238U II. The beta decay of 131I produces 131Xe III. The gamma decay of 60Ni changes neither its…

Which of the following are dedox reactions? For thosethat are, indicate which el

Which of the following are dedox reactions? For thosethat are, indicate which element is oxidized and which isreduced. For those that are not, indicate whether they areprecipitati…

Which of the following are distinguishing features of different disaccharides? 1

Which of the following are distinguishing features of different disaccharides? 1) the arrangement of different monomer units 2) the configuration of the anomeric hydroxyl group of…