Chemistry concepts and calculations

1.Select True or False: The formulas for the alcohol and the carboxylic acid (re

1.Select True or False: The formulas for the alcohol and the carboxylic acid (respectively) from which the following ester may be synthesized are CH3–(CH2)14–COOH and CH3–(CH2)9–O…

1.Sodium hydroxide is slowly added to a solution that is 0.067 M in Cu2+ and 0.1

1.Sodium hydroxide is slowly added to a solution that is 0.067 M in Cu2+ and 0.138 M in Fe3+.    (Ksp = 2.2 x 1020 for copper (II) hydroxide; Ksp = 1.1 x 1036 for iron (III) hydro…

1.Solid iron (III) oxide can be formed by heating solid magnesium oxide in the p

1.Solid iron (III) oxide can be formed by heating solid magnesium oxide in the presence of solid metallic iron. The byproduct of the reaction is solid metallic magnesium. Balance …

1.Starting with 6.0 g of salicylic acid, how many grams of acetylsalicylic acid

1.Starting with 6.0 g of salicylic acid, how many grams of acetylsalicylic acid (theoretical yield) can be made? Assume salicylic acid is the limiting reagent and a one to one sto…

1.Strontium forms face-centered cubic crystals. The atomicradius of a strontium

1.Strontium forms face-centered cubic crystals. The atomicradius of a strontium atom is 215 pm. Consider the face of a unitcell with the nuclei of the strontium atoms at the latti…

1.Succinate dehydrogenase . . . . . . . . A. reduces FAD to FADH2 B. is part of

1.Succinate dehydrogenase . . . . . . . . A. reduces FAD to FADH2 B. is part of the electron transport chain C. is a membrane-bound enzyme D. B and C above E. A, B, and C above 2.…

1.Summarize the benefits and weakness of flame, graphite furnace, and ICP as sou

1.Summarize the benefits and weakness of flame, graphite furnace, and ICP as sources for atomic spectroscopy. Why is ICP used for this method? 2.Log-log plots are often used for I…

1.Suppose a large meteorite struck a pile of clastic sedimentary rock. How would

1.Suppose a large meteorite struck a pile of clastic sedimentary rock. How would pressure and temperature change in the rock? Would the effects be the same for rock on the moon as…

1.Suppose reaction 2B X has catalyst C, and rate = k[B] 2 [C]. Define catalyst.

1.Suppose reaction 2B X has catalyst C, and rate = k[B]2[C]. Define catalyst. Explain how the catalyst is in the mechanism, yet cancels out of the net chemical equation. How does …

1.Suppose that you have a reference to a specific node (somewhere in the middle)

1.Suppose that you have a reference to a specific node (somewhere in the middle) in a simply linked list (only with forward links) that is guaranteed not to be the last node in th…

1.Suppose you are titrating a 0.3500 g sample of an unknown weak acid dissolved

1.Suppose you are titrating a 0.3500 g sample of an unknown weak acid dissolved in water and diluted to 20.00mL. You find it takes 38.52 mL of 0.2100 M KOH to reach an endpoint. Y…

1.Suppose you want to add 100 mL of solvent to a reaction flask. Which piece of

1.Suppose you want to add 100 mL of solvent to a reaction flask. Which piece of glassware shown in Figure 2.4 would be the best choice for accomplishing this task and why? 2. A re…

1.Susan pours some water into a graduated cylinder. The volume of water in the c

1.Susan pours some water into a graduated cylinder. The volume of water in the cylinder is 31.4 mL, and the total mass of the cylinder and water is 96.175 g. Susan then puts a rub…

1.The Cu2+ ions in this experiment are produced by the reaction of 1.0g of coppe

1.The Cu2+ ions in this experiment are produced by the reaction of 1.0g of copper turnings with excess nitric acid. How many moles of Cu2+ are produced? 2. Why isn't hydrochloric …

1.The Ether cleavage reaction is another Sn reaction where the ether is first pr

1.The Ether cleavage reaction is another Sn reaction where the ether is first protonated to create an oxonium ion leaving group. The conjugated base from the acid used in the firs…

1.The ability to see the scattering of light when passed through a colloid is kn

1.The ability to see the scattering of light when passed through a colloid is known as a. an emulsifying agent. b. the Tyndall effect. c. the dispersing effect. d. a scattering ra…

1.The bond order of any molecule containing equal numbers of bonding and antibon

1.The bond order of any molecule containing equal numbers of bonding and antibonding electrons is ________. Select one: A. 2   B. 3   C. 1/2   D. 1   E. 0 2.How many ligands are t…

1.The combustion of 1.32 g of ethanol was done inside the flask attached to the

1.The combustion of 1.32 g of ethanol was done inside the flask attached to the manometer shown below at 19.2 degrees Celsius. The diagram below shows the final mercury levels aft…

1.The compound CH 3 NH 2 reacts with water to form CH 3 NH 3 + and OH - . In thi

1.The compound CH 3 NH 2 reacts with water to form CH 3 NH 3 + and OH - . In this reaction, CH 3 NH 2 is acting as a(n) A) acid. B) base. C) salt. D) catalyst. 2. In what way are …

1.The dioxouranium(VI) cation (uranyl, UO 2 2+ ) can be separated and identified

1.The dioxouranium(VI) cation (uranyl, UO22+) can be separated and identified using the Procedure described in this experiment.  The spot test results for this cation with the fol…

1.The drug LSD has a half-life of 2.5 hours in plasma. What is the rate constant

1.The drug LSD has a half-life of 2.5 hours in plasma. What is the rate constant in hr-1? Report to 2 decimals. 2.A drug has a half-life of 4 hours. What is the rate constant in u…

1.The following data was obtained for the reaction at 25°C: BrO3– (aq) + 5Br– (a

1.The following data was obtained for the reaction at 25°C: BrO3–(aq) + 5Br–(aq) + 6H+(aq) 3Br2(aq) +3H2O(l) Exp [BrO3–]0 (M) [Br–]0 (M) [H+]0 (M) Initial Rate (M/min) 1 0.10 0.10…

1.The following information is given for lead at 1atm: boiling point = 1.740×103

1.The following information is given for lead at 1atm: boiling point = 1.740×103 °C Hvap(1.740×103 °C) = 858.2 J/g melting point = 328.0 °C Hfus(328.0 °C) = 23.00 J/g specific hea…

1.The following statements describe some physical and chemical properties of suc

1.The following statements describe some physical and chemical properties of sucrose (table sugar). Which response includes all that describe chemical properties, and none that de…

1.The formula for acetic acid is CH3COOH. Carmen pours 0.12 moles of acetic acid

1.The formula for acetic acid is CH3COOH. Carmen pours 0.12 moles of acetic acid into an empty beaker. How many acetic acid molecules are in the beaker? Answers 2.0 x 1023 molecul…

1.The game is played on a rectangular grid of any size. 2.The game consists of c

1.The game is played on a rectangular grid of any size. 2.The game consists of cycles 3.At each cycle of the game, every cell on the grid is either alive, Does anybody know how to…

1.The hydroxide ion concentration of an aqueous solution of 0.497 M benzoic acid

1.The hydroxide ion concentration of an aqueous solution of 0.497 M benzoic acid, C6H5COOH is [OH-] = _____M? 2.The hydronium ion concentration of an aqueous solution of 0.59 M ni…

1.The impossibility of zero-­calorie beer Ethanol that we consume is oxidized to

1.The impossibility of zero-­calorie beer Ethanol that we consume is oxidized to acetate in the liver, which is then converted to acetyl-CoA and further metabolized to 2 CO2. Dete…

1.The mass spectrum of a hypothetical element shows that 78.21% of the atoms hav

1.The mass spectrum of a hypothetical element shows that 78.21% of the atoms have a mass of 27.977 u, 1.346% have a mass of 28.976 u, and the remaining have a mass of 29.974 u. Ca…

1.The molar enthalpy of each substance in the following reaction is given. Fe 3

1.The molar enthalpy of each substance in the following reaction is given. Fe3O4(s) +      CO(g) 1.The molar enthalpy of each substance in the following reaction is given. Fe3O4(s…

1.The molar solubility of iron(III) sulfide in a water solution is_________M 2.T

1.The molar solubility of iron(III) sulfide in a water solution is_________M 2.The equilibrium concentration of hydroxide ion in a saturated silver hydroxide solution is__________…

1.The molecules in a sample of SO2 are attracted to each other by a combination

1.The molecules in a sample of SO2 are attracted to each other by a combination of a) London forces and H-bonding b) H-bonding and ionic bonding c) covalent bonding and dipole-dip…

1.The only electron in a hydrogen atom moved from n=3.0 to n=6.0. What is the wa

1.The only electron in a hydrogen atom moved from n=3.0 to n=6.0. What is the wavelength of photon (in nm) being associated with this transition? Use whole numbers of nm without a…

1.The reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. Write a bala

1.The reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. Write a balanced equation for this redox reaction. Write two half reactions to show how many electrons are gain…

1.The remains of an old camp?re are unearthed and it is found that there is only

1.The remains of an old camp?re are unearthed and it is found that there is only 80% as much radioactive carbon-14 in the charcoal samples from the camp?re as there is in modern l…

1.The solubilities in water of several substances are listed. Classify each of t

1.The solubilities in water of several substances are listed. Classify each of these substances as soluble, insoluble or moderately soluble. a. Camphor, C10H16O (topical anti infe…

1.The solubility of NaOH is 129 g NaOH/100 g water at 40°C. If a solution contai

1.The solubility of NaOH is 129 g NaOH/100 g water at 40°C. If a solution contains 70 g NaOH in 50 g of water at 40°C, is the solution saturated or unsaturated? 2. What is the per…

1.The stages of the PUREX process are: Extraction, scrubbing, ionization Scrubbi

1.The stages of the PUREX process are: Extraction, scrubbing, ionization Scrubbing, stripping, chelation Stripping, extraction, megapolation Extraction, scrubbing, stripping Absor…

1.The stockroom ran out of dichloromethane CH 2 Cl 2 , so you have to substitute

1.The stockroom ran out of dichloromethane CH2Cl2, so you have to substitute another solvent for the solvent extraction step. The only solvents available are ethanol (CH3CH2OH), c…

1.The strong acid, HCl, is titrated with a strong base, NaOH, in aqueous solutio

1.The strong acid, HCl, is titrated with a strong base, NaOH, in aqueous solution. What is the pH of the titration solution after the addition of 15.31 mL of 0.100 M NaOH to a 50.…

1.The temperature of a 500. mL sample of gas increases from 150. K to 350. K. Wh

1.The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant? 2. …

1.The value for is 7.46. Would a buffer prepared from and with a pH of 6.96 be c

1.The value for is 7.46. Would a buffer prepared from and with a pH of 6.96 be considered to be an effective buffer? a. yes b. no A buffer in which the mole ratio of to is 0.60 ha…

1.The word “distillate” refers to -the crude mixture before the distillation pro

1.The word “distillate” refers to -the crude mixture before the distillation process begins. -the material remaining in the original flask after the distillation is complete. -the…

1.This question has multiple parts. Work all the parts to get the most points. a

1.This question has multiple parts. Work all the parts to get the most points. a In each of the following sets of ionic compounds, identify the members of the set that are soluble…

1.Toluene (C7H8 ) and nitric acid (HNO3 ) are used in the production of trinitro

1.Toluene (C7H8 ) and nitric acid (HNO3 ) are used in the production of trinitrotoluene (TNT , C7H5N3O6 ), an explosive. C7H8+HNO3C7H5N3O6+H2O (not balanced) A) What mass in grams…

1.Tritium, hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar

1.Tritium, hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation of carbon-14. Tritium has been used to determine the age of wines. A certain wine…

1.True (T) or False (F)? (1) AG of protein unfolding is positive. (2) Immunoglob

1.True (T) or False (F)? (1) AG of protein unfolding is positive. (2) Immunoglobulin is composed of 2 polypeptide chains. (3) Lipid can be an antigen. (4) Vmax can be increased by…

1.True or false A. All compounds containing hydrogen are acids. B. None of the p

1.True or false A. All compounds containing hydrogen are acids. B. None of the products of nuclear fission are radioactive. C. A water solution with pH = 4 has a [H+] that is 100 …

1.True or false A. Fertilizers are the only source of water pollution. B. All is

1.True or false       A. Fertilizers are the only source of water pollution. B. All isotopes are radioactive.    C. Ozone is a form of oxygen D. When an atom emits a beta particle…

1.True or false A. When water is added to an acid solution the pH changes. B. A

1.True or false       A. When water is added to an acid solution the pH changes.       B. A solution of CO2 in water is acidic       C As the [H+] in water increases the pH increa…