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Gen chem Huehue > Coping Mech 1 (Concepts Nakshuta) > Flashcards

Coping Mech 1 (Concepts Nakshuta) Flashcards

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1
Q

A certain reaction is zero order in reactant A and second order in reactant B. What happens to the reaction rate when the concentrations of both reactants are doubled?

a. The reaction rate remains the same.
b. The reaction increases by a factor of two.
c. The reaction increases by a factor of four.
d. The reaction increases by a factor of eight

A

B. The reaction increases by a factor of four.

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2
Q

A rate law relates which of the following?

a. Reaction rate and temperature
b. Reaction rate and concentration
c. Temperature and concentration
d. Energy and concentration

A

d. Reaction rate and concentration

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3
Q

Determine the overall balanced equation for a reaction that has the following proposed mechanism. Which of the following is the acceptable rate law?
Step 1: B2 + B2 → E3 + D slow
Step 2: E3 + A → B2 + C2 fast
Choose one answer.

a. B2 + B2 → E3 + D and R = [B2]2
b. A + B2→ C2 + D and R = [A] [B2]2
c. A + B2 → C2 + D and R = [B2]2
d. A + B2→ C2+ D and R = [E3] [A]

A

c. A + B2 → C2 + D and R = [B2]2

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4
Q

Fill in the blank. A species that changes the rate of a reaction but is neither consumed nor changed in that reaction is a(n) ________________.
Choose one answer.
a. Catalyst
b. Activated complex
c. Intermediate
d. Reactant

A

a. Catalyst

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5
Q

If two molecules collide softly, what will most likely happen to the molecules?
Choose one answer.
a. The molecules will be oriented favorably.
b. The molecules will not be oriented favorably.
c. The molecules are likely to react.
d. The molecules may rebound without reacting.

A

d. The molecules may rebound without reacting.

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6
Q

The decomposition of nitrogen dioxide 2 NO2 → 2 NO + O2 occurs in a two-step sequence at elevated temperatures. The first step is NO2 → NO + O. Which of the following accurately predicts the second step that, when combined with the first step, gives the complete reaction?
Choose one answer.
a. NO2 + O → NO + O2
b. O → NO + O2
c. NO2→ NO
d. O2→ NO + 3 O2

A

a. NO2 + O → NO + O2

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7
Q

To be effective, a collision requires which of the following?
Choose one answer.
a. Enough energy
b. Favorable orientation
c. A reaction mechanism
d. Both A and B

A

d. Both A and B

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8
Q

What is the slowest step in a reaction mechanism called?
Choose one answer.
a. The rate-determining step
b. The uncatalyzed reaction
c. The activation step
d. None of the above

A

a. The rate-determining step

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9
Q

Which of the following statements most accurately describes the energy of the activated complex also called transition state?
Choose one answer.
a. The transition state is lower than the energy of the reactants but higher than the energy of the products.
b. The transition state is lower than the energy of both the reactants and the products.
c. The transition state is higher than the energy of the reactants but lower than the energy of the products.
d. The transition state is higher than the energy of both the reactants and the products.

A

d. The transition state is higher than the energy of both the reactants and the products.

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10
Q

Fill in the blank. The sequence of steps that occurs in a reaction process is called the _____________.
Choose one answer.
a. Order of the reaction
b. Reaction mechanism
c. Overall reaction
d. Rate law

A

b. Reaction mechanism

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11
Q

A silver chloride solution is prepared with the following ion concentrations [Ag+] = 1.0 x 10-6 M and [Cl-] = 1.0 x 10-2 M. If Ksp for AgCl = 1.8 x 10-10, then which of the following is true?
Choose one answer.
a. A precipitate will form.
b. A precipitate will not form.
c. The system is at equilibrium.
d. None of the above

A

a. A precipitate will form.

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12
Q

Acetic acid is a weak electrolyte, because it does which of the following?
Choose one answer.
a. Becomes miscible with water
b. Forms hydronium and hydroxide ions in aqueous solution
c. Lowers the freezing point of water
d. Ionizes only slightly in aqueous solution

A

d. Ionizes only slightly in aqueous solution

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13
Q

To make a water-soluble salt using the silver cation, Ag+, what anion should be chosen?
Choose one answer.
a. NO3⁻
b. CO32⁻
c. Cl⁻
d. PO43⁻

A

a. NO3

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14
Q

Use the solubility rules. Which salt is insoluble in water?
Choose one answer.
a. NaBr
b. NH4Cl
c. FeS
d. (NH4)2S

A

c. FeS

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15
Q

Use the solubility rules. Which salt is soluble in water?
Choose one answer.
a. Fe(OH)3
b. AgCl
c. CaCl2
d. BaSO4

A

c. CaCl2

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16
Q

What is the balanced, net ionic equation for the reaction of nickel(II) chloride and sodium phosphate to give nickel(II) phosphate and sodium chloride?
Choose one answer.
a. 2 Na3PO4(aq) + 3 NiCl2(aq) → Ni3(PO4)2(s) + 6 NaCl(aq)
b. 2 Na3PO4(aq) + 3 NiCl2(aq) → Ni3(PO4)2(aq) + 6 NaCl (aq)
c. 2 PO43⁻(aq) + 3 Ni2⁺(aq) → Ni3(PO4)2(s)
d. Na⁺(aq) + Cl⁻(aq) → NaCl(aq)

A

c. 2 PO43⁻(aq) + 3 Ni2⁺(aq) → Ni3(PO4)2(s)

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17
Q

What is the balanced, net ionic equation for the reaction of aluminum sulfate with sodium hydroxide?
Choose one answer.
a. Al2(SO4)3(aq) + 6 NaOH(aq) → 2 Al(OH)3(s) + 3 Na2SO4(aq)
b. Al3⁺(aq) + 3 OH⁻(aq) → Al(OH)3(s)
c. Al2(SO4)3(aq) + 6 NaOH(aq) → 2 Al(OH)3(aq) + 3 Na2SO4(s)
d. 2 Na⁺(aq) + SO42⁻(aq) → Na2SO4(s)

A

b. Al3⁺(aq) + 3 OH⁻(aq) → Al(OH)3(s)

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18
Q

What is the correct expression for the solubility product constant, Ksp, for FePO4?
Choose one answer.
a. Ksp = [Fe3⁺] / [PO43⁻]3
b. Ksp = [Fe3⁺][P5⁻][O2⁻]3
c. Ksp = [Fe3⁺][PO43⁻]
d. Ksp = [Fe3⁺][PO43⁻] / [FePO4]

A

c. Ksp = [Fe3⁺][PO43⁻]

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19
Q

Which one of the following compounds is a nonelectrolyte when dissolved in water?
Choose one answer.
a. Sodium chloride
b. Calcium chloride
c. Copper sulfate
d. Sugar

A

d. Sugar

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20
Q

Which of the following is NOT a colligative property?
Choose one answer.
a. Molality
b. Vapor-pressure lowering
c. Boiling-point elevation
d. Osmotic pressure

A

a. Molality

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21
Q

H3PO4 is a stronger acid than NH4+. What is the direction of the equilibrium of the following reaction?
NH4+(aq) + H2PO4-(aq) → NH3(aq) + H3PO4(aq)
Choose one answer.
a. The equilibrium lies to the left.
b. The equilibrium lies to the right.
c. The equilibrium is perfectly balanced left and right.
d. This cannot be determined from the information given.

A

a. The equilibrium lies to the left.

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22
Q

The following solutions are mixed in equimolar portions. Will the resulting solution be acidic, basic, neutral, or is there not enough information given?
HCl(aq) + NaHCO3(aq) → ?
Choose one answer.
a. Acidic
b. Basic
c. Neutral
d. This cannot be determined from the information given.

A

a. Acidic

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23
Q

HC2Cl3O2 is a stronger acid than HCHO2. What is the direction of the equilibrium of the following reaction?
HC2Cl3O2(aq) + CHO2-(aq) → C2Cl3O2-(aq) + HCHO2(aq)
Choose one answer.
a. The equilibrium lies to the left.
b. The equilibrium lies to the right.
c. The equilibrium is perfectly balanced left and right.
d. This cannot be determined from the information given.

A

b. The equilibrium lies to the right.

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24
Q

What are the products of the following acid-base reaction?
HCl(aq) + NaOH(aq) → ?
Choose one answer.
a. H3O⁺(aq) + OH⁻(aq)
b. Na⁺(aq) + Cl⁻(aq)
c. H2O(l) + NaCl(aq)
d. No reaction takes place.

A

c. H2O(l) + NaCl(aq)

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25
Q

What is a Brønsted-Lowry acid?
Choose one answer.
a. A proton donor
b. A proton acceptor
c. An electron pair donor
d. An electron pair acceptor

A

a. A proton donor

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26
Q

What is a Lewis acid?
Choose one answer.
a. A proton donor
b. A proton acceptor
c. An electron pair donor
d. An electron pair acceptor

A

d. An electron pair acceptor

27
Q

What is a Lewis base?
Choose one answer.
a. A proton donor
b. A proton acceptor
c. An electron pair acceptor
d. An electron pair donor

A

d. An electron pair donor

28
Q

What will happen to the pH a solution of NH3 by adding HCl?
Choose one answer.
a. The pH will increase.
b. The pH will decrease.
c. The addition of HCl will not change the pH of the solution.
d. There is not enough information given to determine this.

A

b. The pH will decrease

29
Q

Which of the following is an acid-base conjugate pair?
Choose one answer.
a. HF and F⁻
b. HNO2 and NO3⁻
c. HClO and Cl⁻
d. H2CO3 and CO32⁻

A

a. HF and F⁻

30
Q

Which of the following is NOT an acid-base conjugate pair?
Choose one answer.
a. HCN and CN⁻
b. HNO3 and NO3⁻
c. HCl and ClO⁻
d. NH4⁺ and NH3

A

c. HCl and ClO⁻

31
Q

What is a Brønsted-Lowry base?
Choose one answer.
a. A proton donor
b. A proton acceptor
c. A hydroxide donor
d. An electron pair donor

A

b. A proton acceptor

32
Q

Cadmium reacts spontaneously with copper(II) ion.
Cd(s) + Cu2+(aq) → Cd2+(aq) + Cu(s)
What are the half reactions for this reaction?
Choose one answer.
a. Cd(s) + 2e⁻ → Cd2⁺(aq) and Cu2⁺(aq) + 2e⁻ → Cu(s)
b. Cd(s) → Cd2⁺(aq) + 2e⁻ and Cu2⁺(aq) → Cu(s) + 2e⁻
c. Cd(s) → Cd2⁺(aq) + e⁻ and Cu2⁺(aq) + e⁻ → Cu(s)
d. Cd(s) → Cd2⁺(aq) + 2e⁻ and Cu2⁺(aq) + 2e⁻ → Cu(s)

A

d. Cd(s) → Cd2⁺(aq) + 2e⁻ and Cu2⁺(aq) + 2e⁻ → Cu(s)

33
Q

Fill in the blank. When a piece of iron is left outside, it will rust. In this situation, the iron atoms are _______________.
Choose one answer.
a. Losing electrons
b. Gaining electrons
c. Staying neutral
d. Combining with nitrogen gas from the air

A

d. Combining with nitrogen gas from the air

34
Q

Of the following four reactions, how many are oxidation-reduction reactions?
NaOH + HCl → NaCl + H2O
Cu + 2 AgNO3 → 2 Ag + Cu(NO3)2
Mg(OH)2 → MgO + H2O
N2 + 3 H2 → 2 NH3
Choose one answer.
a. 0
b. 1
c. 2

d. 3

A

c. 2

35
Q

What is the cell notation for a voltaic cell with the following equation?
Pb2+(aq) + Cd(s) → Pb(s) + Cd2+(aq)
Choose one answer.
a. Pb | Pb2⁺|| Cd2⁺| Cd
b. Pb2⁺ | Pb || Cd | Cd2⁺
c. Cd | Cd2⁺|| Pb2⁺ | Pb
d. Cd | Pb2⁺|| Pb | Cd2⁺

A

c. Cd | Cd2⁺|| Pb2⁺ | Pb

36
Q

What is the correct balanced equation for the following oxidation-reduction reaction?
Cr2O72- + C2O42- → Cr3+ + CO2
Choose one answer.
a. Cr2O72⁻ + 3 C2O42⁻ → 2 Cr3⁺ + 6 CO2
b. 28 H⁺ + 2 Cr2O72⁻ + 3 C2O42⁻ → 4 Cr3⁺ + 6 CO2 + 14 H2O
c. 14 H⁺ + Cr2O72⁻ + C2O42⁻ → Cr3⁺ + 2 CO2 + 7 H2O
d. 14 H⁺ + Cr2O72⁻ + 3 C2O42⁻ → 2 Cr3⁺ + 6 CO2 + 7 H2O

A

d. 14 H⁺ + Cr2O72⁻ + 3 C2O42⁻ → 2 Cr3⁺ + 6 CO2 + 7 H2O

37
Q

What is the overall cell reaction for the following voltaic cell?
Fe | Fe2+|| Ag+| Ag
Choose one answer.
a. Ag⁺(aq) + Fe(s) → Ag(s) + Fe2⁺(aq)
b. 2 Ag⁺(aq) + Fe(s) → 2 Ag(s) + Fe2⁺(aq)
c. 2 Ag(s) + Fe2⁺(aq) → 2 Ag⁺(aq) + Fe(s)
d. Fe(s) + Fe2⁺(aq) → Ag⁺(aq) + Ag(s)

A

b. 2 Ag⁺(aq) + Fe(s) → 2 Ag(s) + Fe2⁺(aq)

38
Q

Fill in the blank. In the reaction Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l), copper is __________.
Choose one answer.
a. Reduced
b. Electrolyzed
c. Synthesized
d. Oxidized

A

d. Oxidized

39
Q

Beta decay of the nucleus of produces which of the following nuclide?
Choose one answer.
a. Ra
b. Ac
c. Pa
d. U

A

c. Pa

40
Q

The half life of Colbalt-60 is 5.2 years. What happens to an aliquot of cobalt-60 after 5.2 years?
Choose one answer.
a. The concentration decreases by half.
b. The cobalt changes to cobalt-30.
c. The cobalt-60 atom breaks in half.
d. The concentration doubles.

A

a. The concentration decreases by half.

41
Q

What are beta particles?
Choose one answer.
a. Highly active electrons diffused from radioactive nuclei
b. Less active protons diffused from standard nuclei
c. Highly active neutrons in radioactive nuclei
d. X-rays that allow radioactive nuclei’s to be viewed

A

a. Highly active electrons diffused from radioactive nuclei

42
Q

What is the amount of radioactive sample that has NOT decayed after three-half lives have elapsed?
Choose one answer.
a. 1/3 the original amount
b. 1/9 the original amount
c. ¼ the original amount
d. 1/8 the original amount

A

d. 1/8 the original amount

43
Q

What is the half-life of a radioactive nuclide?
Choose one answer.
a. The period of time in which 25% of the original number of atoms undergoes radioactive decay
b. The time at which the isotope becomes non radioactive
c. The period of time in which 50% of the original number of atoms undergoes radioactive
d. The period of time it takes to reduce radioactivity by 100%

A

c. The period of time in which 50% of the original number of atoms undergoes radioactive

44
Q

Which nuclide contains 11 protons, 11 electrons, and 14 neutrons?
Choose one answer.
a. Silicon-11
b. Silicon-14
c. Sodium-11
d. Sodium-25

A

d. Sodium-25

45
Q

Which of the following best describes how the atomic number changes when a nucleus captures an electron?
Choose one answer.
a. It will increase by one.
b. It will decrease by one.
c. It will not change, because the electron has such a small mass.
d. It will increase by two.

A

b. It will decrease by one.

46
Q

Which of the following elements is the daughter nuclide for the alpha decay of polonium-212?
Choose one answer.
a. Lead-208
b. Lead-216
c. Radon-208
d. Radon-216

A

a. Lead-208

47
Q

Which type of radiation has the most penetrating ability?
Choose one answer.
a. An alpha particle
b. A beta particle
c. A gamma ray
d. A neutron

A

c. A gamma ray

48
Q

Which of the following processes is NOT an example of a spontaneous radioactive process?
Choose one answer.
a. Alpha-decay
b. Auto ionization
c. Positron production
d. Beta-decay

A

b. Auto ionization

49
Q

Fill in the blank. CH3CH2CH2C≡CCH2CH2Cl is named __________.
Choose one answer.
a. 7-chloro-4-heptyne
b. 5-chloro-2-heptene
c. 1-acetylenenyl-3-chloropropane
d. 1-chloro-3-heptyne

A

d. 1-chloro-3-heptyne

50
Q

How many structural isomers does butane have?
Choose one answer.
a. 1
b. 2
c. 3
d. 4

A

b. 2

51
Q

How many types of alkyl groups can arise from propane?
Choose one answer.
a. 0
b. 1
c. 2
d. 3

A

c. 2

52
Q

Wally was doing some organic chemistry nomenclature problem. She gave a molecule the following name: 2-Methyl-4-methylhexane. While one can correctly draw the molecule from the name she gave, the name violates the IUPAC rules. What is the IUPAC name of the molecule?
Choose one answer.
a. 2,4-dimethylhexane
b. 3-Methyl-5-methylhexane
c. 3,5-dimethylhexane
d. 1-isopropyl-2-methylbutane

A

a. 2,4-dimethylhexane

53
Q

Nylon is an example of which of the following?
Choose one answer.
a. Copolymer
b. Homopolymer
c. Dimer
d. None of the above

A

a. Copolymer

54
Q

Teflon is an example of which of the following?
Choose one answer.
a. Copolymer
b. Homopolymer
c. Dimer
d. None of the above

A

b. Homopolymer

55
Q

The name methanal is the IUPAC name for which of the following?
Choose one answer.
a. Acetone
b. Formaldehyde
c. Water
d. Rubbing alcohol

A

b. Formaldehyde

56
Q

What is the general name given to hydrocarbons with double bonds?
Choose one answer.
a. Alkenes
b. Alkynes
c. Alkanes
d. Aromatic hydrocarbons

A

a. Alkenes

57
Q

What is the name of the following molecule?
CH3-(CH2)7-CH3
Choose one answer.
a. Heptane
b. Hexane
c. Octane
d. Nonane

A

d. Nonane

58
Q

Which of the following accurately provides the generalized molecular formulas for alkanes and alkenes respectively?
Choose one answer.
a. CnH2n+2 and CnH2n
b. CnH2n and CnH2n+2
c. CnH2n+2 and CnH2n-2
d. CnH2n and CnH2n+1

A

a. CnH2n+2 and CnH2n

59
Q

Which of the following CANNOT form alkenes?
Choose one answer.
a. Methane
b. Ethane
c. Propane
d. All of the above

A

a. Methane

60
Q

Which of the following has the greatest number of C-O bonds?
Choose one answer.
a. Ketone
b. Ester
c. Alcohol
d. Amine

A

b. Ester

61
Q

Which of the following has the least number of C-O bonds?
Choose one answer.
a. Ketone
b. Alcohol
c. Ether
d. Ester

A

b. Alcohol

62
Q

Which of the following is known as rubbing alcohol?
Choose one answer.
a. Methanol
b. Ethanol
c. Propanol
d. Isopropanol

A

d. Isopropanol

63
Q

Which of the following is known as wood alcohol?
Choose one answer.
a. Methanol
b. Ethanol
c. Propanol
d. Isopropanol

A

a. Methanol

64
Q

In a triple bond, how many electrons are shared?
Choose one answer.
a. 3
b. 4
c. 5
d. 6

A

d. 6

Gen chem Huehue (1 decks)

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