Chemistry concepts and calculations

Which of the following fibers is likely to have the highest strength? E-glass S-

Which of the following fibers is likely to have the highest strength? E-glass S-glass Kevlar Nylon Which of the following fibers is likely to have the highest modulus? Kevlar S-gl…

Which of the following frequencies of electromagnetic radiation has the longest

Which of the following frequencies of electromagnetic radiation has the longest wavelength? For potassium metal, the work function phi (the minimum energy needed to eject an elect…

Which of the following functional groups is activating in electrophilic aromatic

Which of the following functional groups is activating in electrophilic aromatic substitution? A. Nitro group B. Chlorine C. Acyl group D. Hydroxyl group Which of the following fu…

Which of the following functional groups is activating in nuc substitution? A. N

Which of the following functional groups is activating in nuc substitution? A. Nitro group meta to the leaving group B. Nitro group ortho or para to the leaving group C. Alkoxy gr…

Which of the following gas samples would have the largest volume, if all samples

Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure? a. 3e23 molecules of N2 b. 0.106 molecules CH4 c. 10.1 g…

Which of the following gases occupies 22.4 L at STP? A) 1 mol hydrogen, H_2 B) 1

Which of the following gases occupies 22.4 L at STP? A) 1 mol hydrogen, H_2 B) 1 mol nitrogen, N_2 C) 1 mol of oxygen, O_2 D) all of the above E) none of the above How many ethane…

Which of the following given the reaction below H_2/pd H_2/Landler catalyst H_2/

Which of the following given the reaction below H_2/pd H_2/Landler catalyst H_2/pt Na/Liq NH_3 Major product of the following reaction 2-methylcyclohexene HSrrightarrow 1-bromo-1-…

Which of the following gives a buffer solution when equal volumes of the two sol

Which of the following gives a buffer solution when equal volumes of the two solutions are mixed? Check all that apply. Use the Henderson-Hasselbalch equation to calculate the pH …

Which of the following gives the balanced equation for this reaction? K_3PO_4 +

Which of the following gives the balanced equation for this reaction? K_3PO_4 + Ca(NO_3)_2 rightarrow Ca_3(PO_4)_2 + KNO_3 KPO_4 + CaNO_3 + KNO_3 K_3PO_4 + Ca(NO_3)_2 rightarrow C…

Which of the following globular (or ellipsoid) proteins would elute first (in th

Which of the following globular (or ellipsoid) proteins would elute first (in the void volume) from the following gel-filtration columns? Select all that apply. Bio-Gel P-30 Bio-G…

Which of the following globular (or ellipsoid) proteins would elute first (in th

Which of the following globular (or ellipsoid) proteins would elute first (in the void volume, Vo) from the following gel-filtration columns? If there is more than one answer, sel…

Which of the following graphs best represents of penicillin, if the reaction is

Which of the following graphs best represents of penicillin, if the reaction is second order with respect to penicillin? For the reaction X_2 + Y + Z rightarrow XY + XZ, it is fou…

Which of the following group 17 elements has the largestmonatomic ions? Why? __

Which of the following group 17 elements has the largestmonatomic ions? Why? __ F- because its neutral atom has thesmallest atomic radius of the group __ F- because its neutral at…

Which of the following groups contains no ionic compounds? HCN, . NO_2, Ca(NO_3)

Which of the following groups contains no ionic compounds? HCN, . NO_2, Ca(NO_3)_2 PCl_5, LiBr, Zn(OH)_2, KOH, CCl_4, SF_4 NaH, CaF_2, NaNH_2 CH_2 O, H_2 S, NH_3 Atoms having equa…

Which of the following half-reactions is not correct? Cu^+ + e^- rightarrow Cu M

Which of the following half-reactions is not correct? Cu^+ + e^- rightarrow Cu Mg rightarrow Mg^2+ + 2e^- Fe^3+ + 2e^- rightarrow Fe^+ Pb^2+ + e^- rightarrow Pb^3+ The following r…

Which of the following has 6 valence electron? C S N Br Be How many valence elec

Which of the following has 6 valence electron? C S N Br Be How many valence electrons are contained in the Lewis structure of CO'? Hydrogen can have at most electrons in its valen…

Which of the following has a molecular structure best described as involving an

Which of the following has a molecular structure best described as involving an "incomplete octet"? CF4 F2 BF3 OF2 NF3 What is the correct molecular geometry for SeBr3 ? trigonal …

Which of the following has ionic bonds (circle them)? B4C3 K20 HF CaCl2 Give the

Which of the following has ionic bonds (circle them)? B4C3 K20 HF CaCl2 Give the oxidation states of the underline elements. HsPO KNO Ans_ Ans molecules A 1.200 g sample of chlori…

Which of the following has square planar geometry? (a) XeF_4 (b) CCl_4 (c) NH^+_

Which of the following has square planar geometry? (a) XeF_4 (b) CCl_4 (c) NH^+_4 (d) PF^-_4 (e) CO_2 Skeletal structures of methane (left), ethylene (middle), and acetylene (righ…

Which of the following has the fastest rate of S_N1 hydrolysis in acetone? A. I

Which of the following has the fastest rate of S_N1 hydrolysis in acetone? A. I B. II C. III D. IV What is the hybridization of the nitrogen atom in pyrrole? A. sp B sp^2 C. sp^3 …

Which of the following has the greatest buffer capacity, that is, which could ab

Which of the following has the greatest buffer capacity, that is, which could absorb the largest molar amounts of acid or base without changing pH significantly? Explain the basis…

Which of the following has the greatest mass? Which of the following has the gre

Which of the following has the greatest mass? Which of the following has the greatest mass? All of the above have the same mass. Balance the chemical equation given below, and det…

Which of the following has the highest Temperature and WHY? A- 38 C B- 96 F C- 3

Which of the following has the highest Temperature and WHY? A- 38 C B- 96 F C- 302 K D- ( a,b has the highest temperature ) E- (c,d has the highest temperature) The answer was A b…

Which of the following has the highest first ionization energy? a. K b. Sr c. Fr

Which of the following has the highest first ionization energy? a. K b. Sr c. Fr d. Co e. Nb Arrange the following in order of increasing values of electron affinity (most negativ…

Which of the following has the highest molar solubility? Agcl: K_ap = 1.8 Times

Which of the following has the highest molar solubility? Agcl: K_ap = 1.8 Times 10^-19 CaF_2: K_ap = 3.4 Times 10^-11 Bl_2S_3: K_ap = -1.1 Times 10^73 The concentration of calcium…

Which of the following has the highest vapor pressure at a given temperature? An

Which of the following has the highest vapor pressure at a given temperature? Answer                              A. CF4                 B. CI4                 C. CH4             …

Which of the following has the largest acid equilibrium constant, K_a? CH_3CO_2H

Which of the following has the largest acid equilibrium constant, K_a? CH_3CO_2H CH_2CJCO_2H CHCl_2CO_2H CCl_3CO_2H Which of the following mechanistically depicts the protonation …

Which of the following has the largest second ionization energy? a) Na b)P c) Al

Which of the following has the largest second ionization energy? a) Na b)P c) Al d) Mg The size of an element's atomic radius ______ from left to right across the periodic table. …

Which of the following has the lowest boiling point, based on structure, polarit

Which of the following has the lowest boiling point, based on structure, polarity, molar mass and bonding? Methane carbon tetrafluoride carbon tetrachloride carbon tetrabromide ca…

Which of the following has the lowest entropy per mole? A) liquid sodium at 100

Which of the following has the lowest entropy per mole? A) liquid sodium at 100 degree C B) gaseous sodium at 900 degree C and 0.5 atm C) a solid solution of sodium in potassium a…

Which of the following has the same number of significant figures as the number

Which of the following has the same number of significant figures as the number 1.00310? 8.66 100 199.791 1 times 10^6 5.119 Which one of the following molecular formulas is also …

Which of the following has the strongest bond and which of the following has the

Which of the following has the strongest bond and which of the following has the longest bond? C - C               C = C            C = C    I                       II            …

Which of the following have 10 electrons in the d orbitals? Mn Fe Cu Zn two of t

Which of the following have 10 electrons in the d orbitals? Mn Fe Cu Zn two of the above Which of the following bonds would be the least polar, yet still be considered polar coval…

Which of the following have quantized values? This question may have more than o

Which of the following have quantized values? This question may have more than one correct answer The pitch of a note played on a slide trombone because the pitch varies based on …

Which of the following have standard enthalpies of formation values that are not

Which of the following have standard enthalpies of formation values that are not zero: Ar(g), Br2(l), H(g), W(s), Hg(s), Li2(g)?  Explain. When ammonia is formed according to the …

Which of the following hormones inhibits the breakdown of lipids? a. glucagon b.

Which of the following hormones inhibits the breakdown of lipids? a. glucagon b. insulin c. progesterone d. glucose e. cholesterol Which of the following terms means the formation…

Which of the following ideas related to the Bohr model of the atom do we no long

Which of the following ideas related to the Bohr model of the atom do we no longer like? Which of teh following electron energy state transition for a hydrogen atoms emits a photo…

Which of the following identifiers used in the exerciseTransactions method defin

Which of the following identifiers used in the exerciseTransactions method defined at line 45 of Listing 2 is a reference type variable? (Check all that apply.) thisAccount testCo…

Which of the following identifiers used in the exerciseTransactions method defin

Which of the following identifiers used in the exerciseTransactions method defined at line 45 is a parameter that is being passed on as an argument to another method? (Check all t…

Which of the following illustrates mass-volume stoichiometry? Question 97 option

Which of the following illustrates mass-volume stoichiometry? Question 97 options: g reactant ? mol reactant ? mol product ? L product g reactant ? mol reactant ? L product ? mol …

Which of the following illustrates the like dissolves like rule for two liquids?

Which of the following illustrates the like dissolves like rule for two liquids? A polar solute is miscible with a polar solvent A nonpolar solute is miscible with a nonpolar solv…

Which of the following in aqueous solution is a strong electrolyte? Question 68

Which of the following in aqueous solution is a strong electrolyte? Question 68 options: H3PO4(aq) PbCl2(s) KOH(aq) all of the above none of the above thank you Which of the follo…

Which of the following indicates the existence of strong intermolecular forces o

Which of the following indicates the existence of strong intermolecular forces of attraction in a liquid? a very low vapor pressure a very low viscosity a very low enthalpy of vap…

Which of the following indicates the existence of strong intermolecular forces o

Which of the following indicates the existence of strong intermolecular forces of attraction in a liquid? a very low vapor pressure a very low viscosity a very low enthalpy of vap…

Which of the following information is primarily from infrared spec A) arrangemen

Which of the following information is primarily from infrared spec A) arrangement of carbon and hydrogen atoms in a compound P> molecular weight of a compound conjugated n syst…

Which of the following information is primarily obtained from infrared spectrosc

Which of the following information is primarily obtained from infrared spectroscopy? A) arrangement of carbon and hydrogen atoms in a compound B) molecular weight of a compound C)…

Which of the following involve an increase or decrease in the entropy of the sys

Which of the following involve an increase or decrease in the entropy of the system and please explain why. a) melting a solid b) sublimation c)freezing d) mixing e) separation f)…

Which of the following ionic compounds is insolvable in water? BaSO_4 Ca(NO_3)_2

Which of the following ionic compounds is insolvable in water? BaSO_4 Ca(NO_3)_2 ZnCl_2 KBr NaOH Suppose the combination of fossil fuels solds about 8.0 Times 10^13 kg of carbon t…

Which of the following ionic compounds would be expected to have the highest lat

Which of the following ionic compounds would be expected to have the highest lattice energy? A) KI B) KBr C) KCl D) KF Which compound is most likely to exist as a gas or liquid at…

Which of the following ionic compounds would provide greater conductivity of ele

Which of the following ionic compounds would provide greater conductivity of electricity (more moles of ions present)? Question options: 1) NaCl 2) Na2SO4 3) K3PO4 4) K2SO4 Which …