Chemistry concepts and calculations
117302 questions • Page 2035 / 2347
Which of the following oxidants will convert a primary alcohol to an aldehyde? s
Which of the following oxidants will convert a primary alcohol to an aldehyde? sodium dichromate /sulfuric acid copper oxide 3 & 4 3 2, 3, & 4 1,2, 3, & 4 none of the …
Which of the following oxidation-reduction reactions will be spontaneous in the
Which of the following oxidation-reduction reactions will be spontaneous in the direction written? Zn^2+ (aq) + Cu (s) rightarrow Zn (s) + Cu^2+ (aq) Mg^2+ (aq) + Be (s) rightarro…
Which of the following pairs has the member with the greater molar entropy liste
Which of the following pairs has the member with the greater molar entropy listed first? All systems are at 25C. Answer a. H2(g), H2O(g) b. CO(g), CO2(g) c. NaCl(s), NaCl(aq) d. H…
Which of the following pairs have the same number of electrons? Fe^2+ and Fe^3+
Which of the following pairs have the same number of electrons? Fe^2+ and Fe^3+ Ca^2+ and K^+ K^+ and Na^+ O_2^- and O^2- H^+ and H^- Give the ions present and their relative numb…
Which of the following pairs is incorrect? The correct name for Ca^2+ is A line
Which of the following pairs is incorrect? The correct name for Ca^2+ is A line in the spectrum of atomic mercury has a wavelength of 25-4 nm. When mercury emits a photon of light…
Which of the following pairs of atomic symbols representisotopes? a.^235 U and ^
Which of the following pairs of atomic symbols representisotopes? a.^235 U and ^238 U b. P4 andP8 c. ^32P and ^83Pb d. ^50Sn and ^51Sb The atomic symbol for Beryllium, ^9…
Which of the following pairs of phase changes is exothermic? melting and freezin
Which of the following pairs of phase changes is exothermic? melting and freezing vaporization and melting sublimation and condensation deposition and vaporization freezing and co…
Which of the following pairs of substances has the higher chemical potential (?)
Which of the following pairs of substances has the higher chemical potential (?) under the specified conditions? They may be equal.; 1.) H2O (s) at -1 degrees Celsius and 1 bar, o…
Which of the following pairs of substances has the higher chemical potential (?)
Which of the following pairs of substances has the higher chemical potential (?) under the specified conditions? They may be equal. 1.) H2O (s) at -1 degrees Celsius and 1 bar, or…
Which of the following pairs of substances has the higher chemical potential (?)
Which of the following pairs of substances has the higher chemical potential (?) under the specified conditions? They may be equal.; 1.) H2O (s) at -1 degrees Celsius and 1 bar, o…
Which of the following pairs of substances has the higher chemical potential (?)
Which of the following pairs of substances has the higher chemical potential (?) under the specified conditions? They may be equal. 1.) H2O (s) at -1 degrees Celsius and 1 bar, or…
Which of the following pairs of substances has the higher chemical potential (?)
Which of the following pairs of substances has the higher chemical potential (?) under the specified conditions? They may be equal.; 1.) H2O (s) at -1 degrees Celsius and 1 bar, o…
Which of the following particles has the largest mass? A neutron a proton a beta
Which of the following particles has the largest mass? A neutron a proton a beta particle an alpha particle a positron Fluorine-18 is radioactive (positron emission) and has a hal…
Which of the following particles is used t bombard Bismuth-209to produce Astatin
Which of the following particles is used t bombard Bismuth-209to produce Astatine-211 and two neutron particles? a. alpha particle b. beta particle c. an actual electron d. …
Which of the following particles or rays requires barriers of lead and/or concre
Which of the following particles or rays requires barriers of lead and/or concrete for protection? beta particle alpha particle gamma ray Positron X-rays What particle or nucleus …
Which of the following parts of the lgG (immunoglobulin G) molecule are not invo
Which of the following parts of the lgG (immunoglobulin G) molecule are not involved in binding to an antigen? Fab Fc Heavy chain Light chain Variable domain The catalytic mechani…
Which of the following peaks are NOT expected to be present in the IR spectrum o
Which of the following peaks are NOT expected to be present in the IR spectrum of the synthesized aspirin product? A. C=O, sharp, at approximately 1750 cm-1 sp3 C-H, sharp, betwee…
Which of the following phase transitions is/are endothermic? 1. liquid water fre
Which of the following phase transitions is/are endothermic? 1. liquid water freezing to a solid at its normal freezing point of 0.0 degree C. 2. the sublimation of solid carbon d…
Which of the following places is not in the life zone of the Earth: In the middl
Which of the following places is not in the life zone of the Earth: In the middle of the Sahara desert The tops of the highest mountains The deepest reaches of the ocean The deep …
Which of the following polymers (only a small repeating section) is isotactic? W
Which of the following polymers (only a small repeating section) is isotactic? Which of the polymers from question 1 would ideally have one proton NMR signal for its two methylene…
Which of the following polysaccharides is used as structural material for plants
Which of the following polysaccharides is used as structural material for plants? Amylose Cellulose Chitin Glycogen Which of the following statements is true about an enzyme-catal…
Which of the following postulates of Kinetic Molecular Theory is/are violated by
Which of the following postulates of Kinetic Molecular Theory is/are violated by a van der Waals gas? 1. A gas consists of tiny particles moving around at random. 2. The volume …
Which of the following predict the effect of temperature and pressure on phase c
Which of the following predict the effect of temperature and pressure on phase changes? Choose all that apply. Increasing pressure can change a solid into a liquid. Increasing tem…
Which of the following procedures (more than I may work) makes sense to clean gl
Which of the following procedures (more than I may work) makes sense to clean glassware before starting this lab: i) water, then ether - let dry iwater, then dry ili) acetone, the…
Which of the following procedures (more than I may work) makes sense to clean gl
Which of the following procedures (more than I may work) makes sense to clean glassware before starting this lab: i) water, then ether - let dry iwater, then dry ili) acetone, the…
Which of the following procedures, if either, is more accurate when making a 1/5
Which of the following procedures, if either, is more accurate when making a 1/50 dilution of a solution? Transfer 1 mL with a pipet into a 50-mL volumetric flask. Both procedures…
Which of the following process are nonspontaneous? Of those that are nonspontane
Which of the following process are nonspontaneous? Of those that are nonspontaneous, which are impossible? a. A bike going uphill b. A meteor falling to Earth c. Obtaining H_2 gas…
Which of the following processes are exothermic processes? You may select more t
Which of the following processes are exothermic processes? You may select more than one answer. Any reaction conducted in an insulated container that causes the contents of the co…
Which of the following processes are exothermic? a. a match burns b. molten meta
Which of the following processes are exothermic? a. a match burns b. molten metal solidifies c. Rubbing alcohol feels cold on the skin Which of the following processes are endothe…
Which of the following processes are reversible in the thermodynamic sense? I. I
Which of the following processes are reversible in the thermodynamic sense? I. Iron in the open air rusts. II. NaCl is discoverd in water and then recovered by the evaporation of …
Which of the following processes are spontaneous? (Select all thatapply.) 1 alig
Which of the following processes are spontaneous? (Select all thatapply.) 1 alignment of iron filings in a magneticfield the melting of ice cubes at 10°C and 1atm pressure the rea…
Which of the following processes does NOT occur during the citric acid A) ADP is
Which of the following processes does NOT occur during the citric acid A) ADP is phosphorylated to make ATP. B) NAD^+ is reduced to NADH. C) FAD is reduced to FADH_2. D) GDP is ph…
Which of the following processes has a delta S > 0 a. CH_3 OH (l) rightarrow CH3
Which of the following processes has a delta S > 0 a. CH_3 OH (l) rightarrow CH3OH (s) b. N_2 (g) + 3H_2 (g) rightarrow 2NH3 (g) c. CH4(g) + H2O(g) rightarrow CO(g) + 3H2(g) d.…
Which of the following processes have a ?S < 0? a) carbon dioxide(g) -> carbon d
Which of the following processes have a ?S < 0? a) carbon dioxide(g) -> carbon dioxide(s) b) methanol (g, at 555 K) -> methanol (g, at 400 K) c) isopropyl alcohol condens…
Which of the following processes have a deltaS > 0? lithium fluoride forms from
Which of the following processes have a deltaS > 0? lithium fluoride forms from its elements 2 NH_3(g) + CO_2(g) rightarrow NH_2CONH_2(aq) + H_2O(l) potassium iodide dissolves …
Which of the following processes influence changes in magma composition after in
Which of the following processes influence changes in magma composition after initial partial melting (circle best answers (there may be more than one))?: (a) crystal fractionatio…
Which of the following processes involves the greatest increase in entropy? SO_3
Which of the following processes involves the greatest increase in entropy? SO_3(g) + H_2(g) rightarrow SO_2(g) + H_2O(g) N_2(g) + 3H_2(g) rightarrow 2NH_3(g) Ag^+(aq) + Cl+- (aq)…
Which of the following processes is endothermic? An atom emits a photon. The ele
Which of the following processes is endothermic? An atom emits a photon. The electron gain process of a fluorine atom. An atom absorbs a photon The condensation of water. None of …
Which of the following processes is exothermic, given the following: N_2(g) + 2
Which of the following processes is exothermic, given the following: N_2(g) + 2 O_2(g) rightarrow N_2O_4(l) Delta H degree = 9.67 kJ/mol N_2(g) + 2 O_2(g) rightarrow 2 NO_2(g) Del…
Which of the following processes is not spontaneous under standard conditions an
Which of the following processes is not spontaneous under standard conditions and 25 degree C as written? (A) HF(aq) + NaOH(aq) rightarrow NaF (aq) + H_2 O (l) (B) Ca (OH)_2 (s) r…
Which of the following processes shows a decrease in entropy of the system? NaCl
Which of the following processes shows a decrease in entropy of the system? NaClO_3 (s) rightarrow Na^+ (aq) ClO_3^- (aq) CH_3OH (l) rightarrow CO (g) + 2 H_2 (g) H_2O(l) rightarr…
Which of the following processes will result in the lowest final temperature of
Which of the following processes will result in the lowest final temperature of the metal water mixture at when thermal equilibrium is reached The specific heat capacity of cobalt…
Which of the following processesdo not depend on spontaneous radioactive decay?
A. the process of bone-scan imaging B. the energy production of the sun C. radium paint that makes watch dials glow in the dark D. using carbon-14 to determine fossil ages E. the …
Which of the following products (citronellal, geraniol, nerol, and/or epoxycitra
Which of the following products (citronellal, geraniol, nerol, and/or epoxycitral) would result from the following reaction process: If you can please show visually how the reacti…
Which of the following properties is NOT c characteristic ofthe Group 1A(1) elem
Which of the following properties is NOT c characteristic ofthe Group 1A(1) elements (alkali metals)? I chose C, a class mate said she thought it was d A.) They are Shiny B.) They…
Which of the following properties is not characteristic of alkanes? Big circle T
Which of the following properties is not characteristic of alkanes? Big circle They are generally less dense than water. Big circle They are nontoxic. Big circle Their melting poi…
Which of the following properties of a glass are physical properties? Check all
Which of the following properties of a glass are physical properties? Check all that apply. 1) It is transparent. 2) It has a mass of 5.4 g m g. 3) It is brittle. 4) Sodium fluori…
Which of the following properties of water can be attributed to hydrogen bonding
Which of the following properties of water can be attributed to hydrogen bonding? high melting point high boiling point low vapor pressure high surface tension 1and 3 1, 2, 3, and…
Which of the following properties of water can be attributed to hydrogen bonding
Which of the following properties of water can be attributed to hydrogen bonding? (1) exothermic heat of formation (2) low vapor pressure (3) higher density of liquid versus solid…
Which of the following properties of water make(s) life possible? (A) Water has
Which of the following properties of water make(s) life possible? (A) Water has strong hydrogen bonding interaction between molecules, which allow is to exist at ambient temperatu…
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