Chemistry concepts and calculations

Which of these carbocations is most stable? 1 2 3 4 5 reactions run in polar sol

Which of these carbocations is most stable? 1 2 3 4 5 reactions run in polar solvents have further rates than S_n1 reactions run in nonpolar sol statements provides the best expla…

Which of these comparisons according to radius is (are)correct? 1) Na^+ .>Mg^2+

Which of these comparisons according to radius is (are)correct? 1) Na^+ .>Mg^2+           2) In^3+ >Sr^2+            3) Cl^- > K^+          4) Cl > K a)  1 and2       …

Which of these compounds is a non-electrolyte? KF C2H6O (ethanol) CH3COOH (aceti

Which of these compounds is a non-electrolyte?                 KF                 C2H6O (ethanol)                 CH3COOH (acetic acid)                 HNO3                 NaOH W…

Which of these compounds is a strong electrolyte? H_2O N_2 CH_3COOH (acetic acid

Which of these compounds is a strong electrolyte? H_2O N_2 CH_3COOH (acetic acid) C_2H_6O (ethanol) KOH Based on the solubility rules, which one of these compounds should be insol…

Which of these compounds is chiral? I II III I and II I and II Sertraline (shown

Which of these compounds is chiral? I II III I and II I and II Sertraline (shown below) is the active ingredient in the antidepressant Zoloft. Pure sertraline has a specific rotat…

Which of these compounds is/are and Z alkene? A) I only B) I and IV only C) I, I

Which of these compounds is/are and Z alkene? A) I only B) I and IV only C) I, II, and IV only D) III and IV only The antibiotic, which is effective against typhoid fever, contain…

Which of these compounds is/are not a Z alkene? (A) I only (B) I and IV only (C)

Which of these compounds is/are not a Z alkene? (A) I only (B) I and IV only (C) I, II and IV only (D) III and IV only This antibiotic, which is effective against typhoid fever, c…

Which of these descriptions of units is FALSE? For PAR or PPFD the units are mic

Which of these descriptions of units is FALSE? For PAR or PPFD the units are micromol m-2 s-1 of energy The partial pressure of a gas like CO2 in air divided by the total pressure…

Which of these elements has the most favorable (most negative) electron affinity

Which of these elements has the most favorable (most negative) electron affinity? A)N B) Ne C) Ca D)S Photochemists use electromagnetic radiation to initiate chemical reactions, o…

Which of these elements would you expect to form the following with copper? (a)

Which of these elements would you expect to form the following with copper? (a) A substitutional solid solution having com- plete solubility (b) A substitutional solid solution of…

Which of these enzymes joins molecules together? (a) Hydrolases (b) Lyases (c) T

Which of these enzymes joins molecules together? (a) Hydrolases (b) Lyases (c) Transferases (d) None of the above. The activity of an enzyme is the activity that transforms 1 mole…

Which of these features do all condensation polymerization reactions have in com

Which of these features do all condensation polymerization reactions have in common? only reactants with different functional groups can be used in the poylmerization a double or …

Which of these instruments produces unique fragmentation patterns and works like

Which of these instruments produces unique fragmentation patterns and works like fingerprint for drug identification? a. GLC b. MS c. HPLC d. Raman Spectrometry Among the followin…

Which of these is a difference between cyclohexene and benzene? Cyclohexene is m

Which of these is a difference between cyclohexene and benzene? Cyclohexene is much more polar than benzene Cyclohexene can add bromine across the diuble bond while this is imposs…

Which of these is a general feature of the lipid bilayer in all biological membr

Which of these is a general feature of the lipid bilayer in all biological membranes? a) individual lipid molecules are free to diffuse laterally in the surface of the bilayer b) …

Which of these is a good reason to install a thermometer in the still head while

Which of these is a good reason to install a thermometer in the still head while performing a distillation? To help determine when different fractions are distilling To help ident…

Which of these is a modified natural polymer? Cellulose nitrocellulose nylon pol

Which of these is a modified natural polymer? Cellulose nitrocellulose nylon polyethylene Nylon was first used for: rope leisure suits women's stocking's waterproof jackets. The m…

Which of these is amphiprotic(amphoteric)? H_2O HCO_3 SO_2 a and b identify the

Which of these is amphiprotic(amphoteric)? H_2O HCO_3 SO_2 a and b identify the conjugate base for HA in the following equation HA + H_2O rightarrow A + H_2O H_2O H_20 A HA Soluti…

Which of these is aromatic? Which of the following technique(s) can readily dist

Which of these is aromatic? Which of the following technique(s) can readily distinguish between: (a) NMR (b) IR (c) MS (d) a and c only (e) all of the above The correct name for t…

Which of these is not a component of sphingomyelin? A) glycerol b) sphingosine f

Which of these is not a component of sphingomyelin? A) glycerol b) sphingosine fatty acid d) phosphocholine In cerebrosides, choline is replaced by: a) inositol b) a monosaccharid…

Which of these is not aromatic? Which intermediate is formed in this reaction? W

Which of these is not aromatic? Which intermediate is formed in this reaction? Which term describes the relationship between these two structures? tautomers resonance structures e…

Which of these is the best reason explaining why you can have frost on the house

Which of these is the best reason explaining why you can have frost on the houseplant on the porch even though the thermometer outside is reading 36° F A. The thermometer is mount…

Which of these is the correct ordering of regions of the atmosphere from lowest

Which of these is the correct ordering of regions of the atmosphere from lowest altitude to highest altitude? a. ionosphere<mesosphere<troposphere<stratoshpere b. stratos…

Which of these is true regarding reduction of carboxylic acids and their derivat

Which of these is true regarding reduction of carboxylic acids and their derivatives? Sodium borohydride will reduce carboxylic acids to alcohols Lithium aluminum hydride will red…

Which of these molecules has an atom with an expanded octet? A) NCl_3 B) Cl_2 C)

Which of these molecules has an atom with an expanded octet? A) NCl_3 B) Cl_2 C) ICI D) AsCl_5 E) HCl According to the VSEPR model, which molecule is predicted to have a molecular…

Which of these options is true/correct? H IIF ] HF] G=-RT ln K =-(8.3 145 JK.mol

Which of these options is true/correct? H IIF ] HF] G=-RT ln K =-(8.3 145 JK.molX298 K) n(7.2 × 10-4 ) = 1.8 × 104 J/mol The concentrations are all at standard conditions, so G = …

Which of these pairs of elements would be most likely to form an ionic compound?

Which of these pairs of elements would be most likely to form an ionic compound?_______ Cl and I Cl and Mg C and S Al and K Al and Mg Calculate the molecular mass of tetaphosphoru…

Which of these pairs of elements would be most likely to from an ionic Cl and Mg

Which of these pairs of elements would be most likely to from an ionic Cl and Mg Cl and I Al and K Al and Mg C and S What does the abbreviation VSEPR stand for? Variable Selective…

Which of these pollutants is least likely to be responsible for acid rain? SO_2

Which of these pollutants is least likely to be responsible for acid rain? SO_2 CO_2 NO_2 CO Differentiate between mixing height and inversion height. The plume that develops imme…

Which of these process would be catabolic) a) building muscle b) building fat c)

Which of these process would be catabolic) a) building muscle b) building fat c) conversation of glucose of glycogen d) glycolysis 2. Metabolic products of carbohydrate and fatty …

Which of these properties is/are characteristic(s) of gases? High Compressibilit

Which of these properties is/are characteristic(s) of gases? High Compressibility Relatively large distances between molecules Formation of homogeneous mixtures regardless of the …

Which of these provides most effective conclusion for the computational chemistr

Which of these provides most effective conclusion for the computational chemistry laboratory? In this experiment, we calculated the frequencies of various carbon-carbon bonds to b…

Which of these reactions has Delta S degree > 0? PCl_5(g) rightarrow PCI_3 (g) +

Which of these reactions has Delta S degree > 0? PCl_5(g) rightarrow PCI_3 (g) + CI_2 (g) H_2(g) + O_2(g)rightarrow H_2O_2 (aq) H2O(l) rightarrow H2O(s) S_8(1) rightarrow S8(s)…

Which of these sets of atomic numbers represents a period? A Li. Na. K a B, Sa.

Which of these sets of atomic numbers represents a period? A Li. Na. K a B, Sa. Si C. B, O. Ne Co, P. S Elements C, Si, Ge. Sn, and Pb have similar. A Atomic numbers B. Atomic sym…

Which of these solute combination are more complex than others? Explain A) sodiu

Which of these solute combination are more complex than others? Explain A) sodium chloride(NaCl) and sucrose c12h22o11 B)NaCl and CaCl2 C)NaCl and NaNO3 D) C12H22O11 and glucose W…

Which of these spots shows how a good solvent behaves? The answer is in the para

Which of these spots shows how a good solvent behaves? The answer is in the paragraph below, but I don't understand why and if it's option a or option b. Thanks will thumbs up ple…

Which of these statements about enzyme-catalyzed reactions is false? A) At satur

Which of these statements about enzyme-catalyzed reactions is false? A) At saturating levels of substrate, the rate of an enzyme-catalyzed reaction is proportional to the enzyme c…

Which of these statements about enzyme-catalyzed reactions is false? A. At satur

Which of these statements about enzyme-catalyzed reactions is false? A. At saturating levels of substrate, the rate of an enzyme-catalyzed reaction is proportional to the enzyme c…

Which of these statements about hydrogen bonds is not true? A. Individual hydrog

Which of these statements about hydrogen bonds is not true? A. Individual hydrogen bonds in liquid water exist for many seconds and sometimes for minutes. B. The strength of a hyd…

Which of these statements about the common-ion effect is most correct? a) The so

Which of these statements about the common-ion effect is most correct? a) The solubility of a weak ionizing salt MA is decreased in a solution that already contains either M or A …

Which of these statements about vancomycin are true? [Select all that apply.] Re

Which of these statements about vancomycin are true? [Select all that apply.] Resistance to vancomycin has not yet emerged in a clinical setting. vancomycin was widely used clinic…

Which of these statements are right? Referring to SN1 and SN2 only A. Whichever

Which of these statements are right? Referring to SN1 and SN2 only A. Whichever mechanism has the fewest number of steps will be the one with the fastest rate of transformation. B…

Which of these statements are true? Select all that apply. The Delta H_rxn for t

Which of these statements are true? Select all that apply. The Delta H_rxn for the reaction C(s) + O_2(g) rightarrow CO_2(g) is the same as the Delta H_f for CO_2(g). The Delta H_…

Which of these statements best describes the relationship between temperature an

Which of these statements best describes the relationship between temperature and reaction rates? Please explain each answer to why it is or isn't correct. A) If the enery of the …

Which of these statements concerning pOH is correct ? pOH is based on the [OH -

Which of these statements concerning pOH is correct? pOH is based on the [OH-] in solution. If [OH-] = 1.0 x 10-13, then the solution is basic. pH = 8.0 is ten times more acidic t…

Which of these statements concerning pressure and weather are correct? I. Low pr

Which of these statements concerning pressure and weather are correct? I. Low pressure in a region tends to draw in storms II. High pressure in a region usually indicates clear we…

Which of these statements correctly describes the electronic charge distribution

Which of these statements correctly describes the electronic charge distribution in a molecule? I. The charge density around each atom is the same as it is in the free atom. II. T…

Which of these statements is false, in the context of the molecules and process

Which of these statements is false, in the context of the molecules and process of vision ? Question 12 Which of these statements is false, in the context of the molecules and pro…

Which of these statements is generally true of integral membrane proteins? A. Th

Which of these statements is generally true of integral membrane proteins? A. The secondary structure in the transmembrane region consists solely of -helices or -sheets. B.The dom…

Which of these statements is generally true of integral membrane proteins? A. Th

Which of these statements is generally true of integral membrane proteins? A. The secondary structure in the transmembrane region consists solely of -helices or -sheets. B.The dom…