Chemistry concepts and calculations
117302 questions • Page 250 / 2347
21)Which aqueous solution has the highest boiling point? 31,5 M CaCl2 (aq) B, 2.
21)Which aqueous solution has the highest boiling point? 31,5 M CaCl2 (aq) B, 2.0 M GH1206 (sugar) (aa) C. 2.0 M NaBr (aq)D. 2.0 M KNOs (aa) covalent bond occurs between: A. a met…
21, Antacids are commonly determined by acid-base back titrations because the lo
21, Antacids are commonly determined by acid-base back titrations because the low solubility of the antacid slows the direct reaction with acid. A 0.3251 g sample of a leading ant…
21-24 ?! Calculate the density of butane gas, C_4H_8, at 15 degreeC and 0.950 at
21-24 ?! Calculate the density of butane gas, C_4H_8, at 15 degreeC and 0.950 atm. A) 4.85 g/L B) 0.442 g/L C) 1.250 g/L D) 2.26 g/L 18. Calculate the squareroot-mean-square speed…
21-25 work not necessary Which of the following reactions would have the smalles
21-25 work not necessary Which of the following reactions would have the smallest value of at 298 K? A) A + B rightarrow 3 C: E^+_cell = +1.62 V B) A + B rightarrow 2 C: E degree_…
21. (1 pt) Identify the two classes of nucleic acids. A. ribonucleic acid and de
21. (1 pt) Identify the two classes of nucleic acids. A. ribonucleic acid and deoxyribonucleic acid B. alpha helix and pleated sheet C. dipeptide and tripeptide D. primary and sec…
21. (6 pts) What is the theoretical yield of HF (in g) if 6.00 g CaF2 (FM-78.08)
21. (6 pts) What is the theoretical yield of HF (in g) if 6.00 g CaF2 (FM-78.08) react with 7.20 g HSO (FM = 98.09)? What is the percent yield if 2.63 g of HF (FM = 20.01) are act…
21. 10.00 wt% HCl(aq) solution has a density of 1.0474 g/mL. Convert weight perc
21. 10.00 wt% HCl(aq) solution has a density of 1.0474 g/mL. Convert weight percent to molarity. 22. Use structure arguments to identify the strongest acid in this group: HFO, HCI…
21. A compound, C 6 H 8 O, exhibits IR absorption at 1680 cm -1 . Its carbon NMR
21. A compound, C6H8O, exhibits IR absorption at 1680 cm-1. Its carbon NMR shifts are given below. The number of hydrogens at each carbon, determined by DEPT, is given in parenthe…
21. A counterflow, concentric tube heat exchanger used for engine cooling has be
21. A counterflow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 4.…
21. A phosphide ion has: A) B) C) 10 protons and 13 electrons 12 protons and 15
21. A phosphide ion has: A) B) C) 10 protons and 13 electrons 12 protons and 15 electrons 15 protons and 15 electrons D) E) 15 protons and 18 electrons 18 protons and 21 electrons…
21. All amino acids are made of only carbon, hydrogen, and oxygen atoms. 22. Gal
21. All amino acids are made of only carbon, hydrogen, and oxygen atoms. 22. Galactose and glucose are monosaccharides containing different numbers of carbon atoms. 23. Protein mo…
21. Antacids are commonly determined by acid-base back titrations because the lo
21. Antacids are commonly determined by acid-base back titrations because the low solubility of the antacid slows the direct reaction with acid. A 0.3251 g sample of a leading ant…
21. Boyles law states that pressure is directly related to volume when all other
21. Boyles law states that pressure is directly related to volume when all other variables are held constant? t/f 22. The use of an Ambu bag illustrates Boyles law? t/f 23. Dalton…
21. Calculate the [OH in an aqueous solution which is 0.125M NH3 and 0.300MNH4CI
21. Calculate the [OH in an aqueous solution which is 0.125M NH3 and 0.300MNH4CI. The value of K, for NH3 is 1.8 x 10-5 A) 4.3 x 105 M B) 1.8 x 10-5 M C) 7.5 x 10-6 M D) 0.425 M E…
21. Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produ
21. Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produced from the complete combustion of 6.50 kg of methane. Compare your result with the volume of CO2 …
21. Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produ
21. Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produced from the complete combustion of 6.50 kg of methane. Compare your result with the volume of CO2 …
21. Classify the following transformation as oxidation, reduction, or neither: a
21. Classify the following transformation as oxidation, reduction, or neither: alkyne alkene 22. Classify the following transformation as oxidation, reduction, or neither: alkene …
21. During what conditions does fatty acid synthesis take place? 22. For fatty a
21. During what conditions does fatty acid synthesis take place? 22. For fatty acid synthesis, where in the cell does it take place? 23. What are the starting molecul (plenty or s…
21. Find the correct comparison of Ionic Radius, IRetement, for either cations (
21. Find the correct comparison of Ionic Radius, IRetement, for either cations (by losin Ratemuen.for either cations by electrons) or anions ( gaining electrons) from the followin…
21. Fission reactions can be run continuously to generate electric power commerc
21. Fission reactions can be run continuously to generate electric power commercially because (a) the reactors generate more readily fissionable fuel than they consume (b) graphit…
21. If 2.00 mol of an ideal gas at 300 K and 3.00 atm expands from 6.0 L to 12.0
21. If 2.00 mol of an ideal gas at 300 K and 3.00 atm expands from 6.0 L to 12.0 L and a final pressure of 1.50 atm in two steps: (1) the gas is cooled at constant volume until it…
21. If you add a cation to soil and it adsorbs via a bidentate reaction on proto
21. If you add a cation to soil and it adsorbs via a bidentate reaction on protonated functional groups, how many protons will be released? 22. What is ligand exchange and what su…
21. If you have one gram of each of the following metals, which one would you ex
21. If you have one gram of each of the following metals, which one would you expect to heat up the fastest? A) Silver B) Lead C) Aluminum D) Iron 22. If it requires 67 J of heat …
21. In the following reaction, what is reagent (a) I and IV (b) IV only (c) ll a
21. In the following reaction, what is reagent (a) I and IV (b) IV only (c) ll and IV (d) ll and 26. Which of these dienes can undergo a Diel-Alder reaction? 1, HCI, HONO 2. Reage…
21. NADH reduces the rate of all of the following except ___________. a. -Ketogl
21. NADH reduces the rate of all of the following except ___________. a. -Ketoglutarate dehydrogenase b. Succinyl-CoA synthetase c. Isocitrate dehydrogenase d. Malate dehydrogenas…
21. Questions 21-23 refer to the following information. The following is the mec
21. Questions 21-23 refer to the following information. The following is the mechanism and reaction energy profile for the reaction represented above. Step 1: Bn 2Br reversible St…
21. Questions 21-23 refer to the following information. The following is the mec
21. Questions 21-23 refer to the following information. The following is the mechanism and reaction energy profile for the reaction represented above. Step 1: Bn 2Br reversible St…
21. S is negative for the reaction ___ [A] Mg(NO 3 ) 2 (aq)+K 2 CO 3 (aq)MgCO 3
21. S is negative for the reaction ___ [A] Mg(NO3)2(aq)+K2CO3(aq)MgCO3(s)+2NaNO3(aq) [B] LiOH(aq)Li+(aq)+OH(aq) [C] C6H12O6(s)6C(s)+6H2(g)+3O2(g) [D] 2NH3(g)N2(g)+3H2(…
21. The formula for the hydronium ion is a. H2o d. HO e. HO 22. Which of the fol
21. The formula for the hydronium ion is a. H2o d. HO e. HO 22. Which of the following is NOT a base a. NaOH b. CaCO c. NH3 d. BaO e. H3PO 23. According to the activity series, wh…
21. The main purpose of a __________ is to reduce attenuation, although some mod
21. The main purpose of a __________ is to reduce attenuation, although some models provide other functions in addition to this. A) repeater B) hub …
21. The pH of a 0.120 M phenol solution is (Ka of phenol = 1.3 x 10-10): a. 1.00
21. The pH of a 0.120 M phenol solution is (Ka of phenol = 1.3 x 10-10): a. 1.000 b. 10.81 c. 11.11 d. 5.40 e. 4.48 22. Which list gives equal concentrations of the following solu…
21. Use structure arguments to identify the strongest acid in this group: HFo, H
21. Use structure arguments to identify the strongest acid in this group: HFo, Holo, HBro, HIO 22. In this reaction, should we expect the reactants or the products to be favored? …
21. What is the Bronsted acid in the following equation? HBr + H2 O H3 O+ + Br 2
21. What is the Bronsted acid in the following equation? HBr + H2 O H3 O+ + Br 22. What is the Bronsted base in the following equation? HBr + H2 O H3 O+ + Br 23. What is the conju…
21. What is the Bronsted acid in the following equation? HBr + H2 O H3 O+ + Br 2
21. What is the Bronsted acid in the following equation? HBr + H2 O H3 O+ + Br 22. What is the Bronsted base in the following equation? HBr + H2 O H3 O+ + Br 23. What is the conju…
21. What is the major H Which is the most acidic hydrocarbon? product of this re
21. What is the major H Which is the most acidic hydrocarbon? product of this reaction? 16. 17. Arrange these compounds in order of acidity. List Arrange these compounds in order …
21. Which ion-dipole interaction below results in the smallest (less negative) h
21. Which ion-dipole interaction below results in the smallest (less negative) hydration energy? 12 pts) water Na' water K' water Provide a brief explanation for your answer. 12 p…
21. Which ion-dipole interaction below results in the smallest (less negative) h
21. Which ion-dipole interaction below results in the smallest (less negative) hydration energy? 12 pts) water Na' water K' water Provide a brief explanation for your answer. 12 p…
21. Which ionic solid has the smallest lattice energy? A. NaCl B. CaBr2 C. BaS D
21. Which ionic solid has the smallest lattice energy? A. NaCl B. CaBr2 C. BaS D. MgO E. Na2O 22. Based on our lecture discussion on the common ion effect, for the following react…
21. Which of the follanwing metric prefises is paired with an incorrect ahbnevia
21. Which of the follanwing metric prefises is paired with an incorrect ahbneviation? milli-, ml. b. micro-, ? a. c. centi, c d, kilo, e.mrga, M 22. The metric prefix "pico meansb…
21. Which of the following features is associated with a convergent boundary? A.
21. Which of the following features is associated with a convergent boundary? A. The Mississippi River B. The Grand Canyon C. Mt St Helens D. Death Valley E. Michigan Stadium 22. …
21. Which of the following has the bonds ranked in correct order in tems of pola
21. Which of the following has the bonds ranked in correct order in tems of polarity, from the mo polar to the least polar? (bonds: O-S, N-H, F-S. O-H, and N-Br Electronegativity …
21. Which of the following is pot made of glucose (A) cellulose (8) glycogen (C)
21. Which of the following is pot made of glucose (A) cellulose (8) glycogen (C) starch (D) chitin 22. A monosaccharide that is part of human e (A) glucose. (8) fructose. (C) ribo…
21. Which of the following is produced in the reaction below? 2CH3CH2-SH Hg2+ a.
21. Which of the following is produced in the reaction below? 2CH3CH2-SH Hg2+ a. CH,CH SSCH CH b. CH.CH SHgSCH.CH d. HSHgSH 22 Dehydration of an alcohol will produce an)- b. ether…
21. Which of the following is true regarding gel fi tration chromatography and S
21. Which of the following is true regarding gel fi tration chromatography and SDS.PAGE? A) In both, small proteins move most rapidly. In PAGE, large proteins move most rapidly bu…
21. Which of the following statements is false? A. Primary structure determines
21. Which of the following statements is false? A. Primary structure determines the three-dimensional structure of a protein. B. The peptide bond has considerable double-bond char…
21. Which of the following statements is false? A. Primary structure determines
21. Which of the following statements is false? A. Primary structure determines the three-dimensional structure of a protein. B. The peptide bond has considerable double-bond char…
21. Which one of the following would be expected to change the value of the equi
21. Which one of the following would be expected to change the value of the equilibrium constant? (a) adding reactant (b) adding product (c) adding a catalyst (d) changing the tem…
21. Which statement best describes a dynamic chemical equilibrium? (A) when the
21. Which statement best describes a dynamic chemical equilibrium? (A) when the forward and reverse reaction rates are equal (B) when the forward and reverse reaction rates are ze…
21. a. Following is a list of electron configurations. Group the configurations
21. a. Following is a list of electron configurations. Group the configurations in pairs that would represent similar chemical properties of the atoms. Give the chemical symbols f…
21. i thought understood electrolysis but i guess not. can someone please explai
21. i thought understood electrolysis but i guess not. can someone please explain why I2 is the answer? as far as e calculations i am confused as to when i change the sign to nega…
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