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CH 101 > Final Exam Review > Flashcards

Final Exam Review Flashcards

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1
Q

What is the electron configuration of V^3+ (element 23)
A) [Ar] 4s2 3d3
B) [Ar] 3d3
C) [Ar] 4s2 3d0
D) [Ar] 3d2
E) [Ar] 4d2

A

D

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2
Q

Which of the following have three unpaired electrons in the outer shell? I) N (element 7) II) Tc4+ (element 43) III) Ru3+ (element 44) IV) Co (element 27)

a) I only
b) II & IV
c) I & IV
d) I & II
e) I, II, & IV

A

E

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3
Q

Which of the following transitions represent a real emission of energy?
A) 2d to 4s
B) 6s to 6p
C) 5p to 3d
D) 3p to 3d
E) none of the above

A

C

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4
Q

(see screenshots) Which electron configuration represents a violation of the Pauli exclusion principle?

A

E

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5
Q

(see screenshots) Which electron configuration represents a violation of Hund’s rule of maximum multiplicity?

VIOLATION

A

A

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6
Q

(See screenshots) Which electron configuration represents a violation of Aufbau’s exclusion principle?

A

D

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7
Q

In which orbital does an electron in a sulfur atom (s, element 16) experience the greatest effective nuclear charge?
A) 1s
B) 2s
C) 2p
D) 3s
E) 3p

A

A

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8
Q

Which of the following have quantized values?
A) the elevation of the treads of a moving escalator
B) the elevations at which the doors of an elevator open
C) the speed of an automobile
D) both (a) and (b)
E) none of the above

A

B

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9
Q

In the Bohr model of the atom______
A) electron paths are controlled by probability
B)electrons are describes as waves in orbitals
C)electrons can have any energy
D) electron energies are quantized
E) both B and D

A

D

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10
Q

Which of the subshells below do not exist due to the constraints upon the l quantum number?
A) 2s
B) 2p
C) 2d
D) all of the above
E) none of the above

A

C

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11
Q

An electron cannot have the quantum numbers n=_____, l=_____, ml=______
A) 485, 0, 0
B) 3, 2, -1
C) 3, 2, -3
D) 6, 1, 0
E) 3, 2, -2

A

C

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12
Q

Balmer observed a visible light hydrogen emission line for the transition from n=6 to n=2 for the transition from n=7 to n=2. Why?
A) this transition does not exist in the H atom
B) this transition occurs in the ultraviolet
C) this transition occurs in the infrared
D) this transition is an absorption, not an emission
E) none of the above

A

B

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13
Q

Where is the periodic table could you find atoms with similar properties?
A) within the same block (s, p, d, f)
B) within the same period
C) within the same group
D) all of the above
E) atoms are not arranged according to properties

A

C

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14
Q

Use the Bohr model to determine the radius of n=4 orbit of a He1+ ion
A) 50.0 pm
B) 105.9 pm
C) 211.8 pm
D) 423.6 pm
E) this orbit does not exist in the Bohr model

A

D

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15
Q

What is the wavelength of the nhi=4 to nlo = 1 emissions transition (Lyman series)
A) 45.6 nm
B) 97.3 nm
C) 226.3 nm
D) 415.5 nm
E) 656.2 nm

A

B

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16
Q

Which of the following transitions represents a real ABSORPTION of energy?
A) 2d to 4s
B) 6s to 6p
C) 5p to 3d
D) 2p to 2s

A

B

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17
Q

Which transition in a hydrogen atom would absorb the photon of the smallest frequency?
A)n=6 to n=2
B) n=3 to n=1
C) n=1 to n=2
D) n=2 to n=9
E) n=58 to n=63

A

E

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18
Q

Compare the following elements described by their electron configurations:
[Kr]5s^24d^4 and [Ar]4s^23d^104p^4
A) 1&2 are transition metals
B) 1 & 2 have four unpaired electrons in their highest energy orbitals
C) 1 is the more likely to form a cation
D) 2 has a higher ionization potential than 1
E) Both c& d are corrects

A

E

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19
Q

What is the wavelength of the nhi=3 to nlo=2 emission transitions the Balmer series for hydrogen?
A)211 nm
B) 459 nm
C) 599 nm
D) 656 nm
E) 811 nm

A

D

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20
Q

Which of the following atoms has the highest electron affinity (EA)?
A) 9F
B) 16S
C) 33As
D) 50Sn
E) they have the same EA

A

A

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21
Q

Fill in the orbital energy diagram
How many valence electrons does Mn2+ have?
A) 3
B) 5
C) 7
D) 9
E) 11

A

B

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22
Q

What are the n, l, ml, and m values that best represent an electron in the sub shell that the arrow is pointing to?
A) 3, 1, 1, 1/2
B) 3, 0, 0, 1/2
C) 4, 2, -1,1/2
D) 3, 2, -3, 1/2
E) None of the above

A

E

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23
Q

Which of the following quantum numbers is/are the primary indicator(s) for the energy of an electron in a sub shell of a multi-electron system?
A) ml only
B) n only
C) l only
D) b and l
E) l and ml

A

D

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24
Q

Higher energy electrons are closer/further to the nucleus and are therefore easier/harder to remove and therefore represent a higher/lower electronegativity of of the atom.
A) closer, easier lower
B) closer, harder, higher
C) further, harder, higher
D) further, easier, lower
E) closer, harder, lower

A

D

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25
Q

(see screenshot) For atoms D, E, and F, list the atoms in order of decreasing electron affinity:
A) D>E>F
B) E>D>F
C) F>D>E
D) F>D>F
E) not enough information

A

C

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26
Q

Which of the following terms accurately describes the energy associated with the process: Li(g) to Li+ (g) + e-
A) electron affinity
B) binding energy
C) ionization energy
D) electronegativity
E) none of these

A

C

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27
Q

The species that contains 24 protons, 26 neutrons, and 22 electrons would be represented by the symbol:
A) 50V^3+
B) 26Cr^2+
C) 50Cr^2+
D) 50Mn^2+
E) none of these

A

C

28
Q

Which of the following electron configurations represent an excited state?
A) [He]2s^2 2p^5
B) [Kr] 4d^10 5s^2 5p^1
C) [Ar] 3d^10 4s^2 4p^5
D) [Ne] 3s^2 3p^2 4s^1
E) all are in the ground state

A

D

29
Q

Which of these isoelectric species has the smallest radius?
A) Br- (Z=35)
B) Sr2- (Z=38)
C) Rb- (Z=37)
D) Se2- (Z=34)
E) They are all the same size

A

B

30
Q

Which statement is wrong?
A) the atomic weight of carbon is about 12
B) The most stable ion of lithium is Li+
C) A phosphorus atom (Z = 15) is larger than an antimony (Z = 51) atom
D) The radius of a sodium atom is larger than that of a sodium ion
E) Oxygen has a smaller electron affinity than fluorine

A

C

31
Q

Are the electron configurations of 131I and 127I the same?
A) yes
B) no
C) not enough information
D) none of the above

A

A

32
Q

List the following in order of increasing nitrogen-oxygen bond lengths: NO31-, NO1+, NOCl, NO21-
A) NO3-2, NO1-, NOCl, NO21-
B) NO1+, NOCl, NO21-, NO31-
C) NOCl, NO21-, NO31-, NO1+
D) NO21-, NO31-, NO1+, NOCl
E) none of the above

A

B

33
Q

NO2 has an odd number of electrons. Using only formal charges, which of the three possible resonance structures below is the best?
A) A
B) B
C) C
D) all are equally good
E) all are equally bad

A

C

34
Q

The hypochlorite ion is the active ingredient in bleach. Hypochlorous acid is made by adding H1+ to the hypochlorite ion. By drawing the Lewis structure of hypochlorite and based on the formal charges and oxidation states of both atoms, does hypochlorous acid have an H-Cl bond or an H-O bond?
A) H-Cl bond
B) H-O bond
C) this compound is not ionic
D) not enough information

A

B

35
Q

What is the name of N2O3?
A) Nitrogen trioxide
B) Nitrogen oxide
C) Dinitrogen trioxide
D) Dinitrogen oxide
E) none of the above

A

C

36
Q

Which bonding model correctly predicts if a molecule is a paramagnetic or diamagnetic?
A) Lewis structures
B) Valence bond theory (hybrid orbital model)
C) molecular orbital theory
D) all models can provide that information
E) none of the models can provide that information

A

C

37
Q

Which is the best Lewis structure for OCN1-?
A) A only
B) B only
C) C only
D) Both A and B

A

C

38
Q

What are the Br-I-BR bond angles:
A) 120
B) <109.5
C) <120
D) 90, 180
E) >90, >180

A

E

39
Q

Which of the following molecules or ions have multiple resonance structures without considering formal charges: hypochlorite, N2) (central N), COF2 (central C)?
A) N2O only
B) COF2 only
C) hypochlorite only
D) COf2 and N2O
E) N2O and hypochlorite

A

A

40
Q

Aqueous ammonia NH3 reacts with a strong acid to form NH4+. What change is the hybridization of nitrogen occurs in this reaction?
A) sp to sp2
B) sp2 to sp3
C) sp3 to sp
D) sp2 to sp
E) No change

A

E

41
Q

For which of the following molecules and ions does the nitrogen atom have sp3 hybridization: NO31-, N2, NHCl2?
A) NO31- only
B) N2 only
C) NHCL2 only
D) N2 and NHCl2
E) NO31- and NHCl2

A

C

42
Q

How many sigma bonds and pi bonds are in C2H4?
A) four sigma, one pi
B) four sigma, two pi
C) five sigma, one pi
D) five sigma, zero pi
E) six sigma, zero pi

A

C

43
Q

Which orbital drawings would result in sigma overlap?
A) A only
B) B only
C) C only
D) A& B
E) B&C

A

E

44
Q

What combination of orbitals given below can give pi bonding?
I. s+s II. s+p III. p+p IV. p+d V. d+d

A) I only
B) III only
C) V only
D) III and V
E) III, IV, and V

A

E

45
Q

Consider the three structures below and choose the correct statements concerning C-O bonds
A) C-O bond in structure 1 is the weakest
B) C-O bonds in structures 2 and 3 are of equal strength
C) C-O bond in structure 2 is the shortest
D) both (a) and (b) are correct
E) Bothe (a) and (c) are correct

A

E

46
Q

How many total electrons are found in valence bonding orbitals in O2^2-?
A) 2
B) 4
C) 6
D) 8
E) 10

A

D

47
Q

How many total electrons are found in valence antibonding orbitals in O2^2-?
A) 2
B) 4
C) 6
D) 8
E) 10

A

C

48
Q

The F-C-H bond angle in monofluoromethane (CH3F) is:
A) 90
B) 120
C) 109.5
D) greater than 109.5
E) less than 109.5

A

D

49
Q

There are _______ resonance forms for the nitrate ion (NO3-).
A) 0
B) 1
C) 2
D) 3
E) 4

A

D

50
Q

Consider MO (Molecular Orbital) Theory. For the N2 molecule, there are ________ the sigma 2p bonding orbital?
A) 0
B) 1
C) 2
D) 3
E) 4

A

C

51
Q

Consider the following elementary, one-step reaction: NH41+ (aq) + NO_2^1- (aq) –> N_2(g) + 2H_2O (l)

which of the following statements is true?
1. The rate of the forward reaction will double if the concentration of N_2 is doubled
2. The rate of the forward reaction will quadrupled if the concentration of NO_2 10 is quadrupled
3. The rate constant (k) of the forward reaction will double if the concentration of NH_4^1+ is doubled

A) 1only
B) 2 only
C) 2 & 3
D) 1 & 2
E) 1 & 3

A

B

52
Q

Consider the equilibrium reaction below and choose the correct statement: 2 NO_2 (g) <–> N_2O_4 (g) and delta H = -57.1 kJ

  1. The reaction mixture will become more colorless as more NO_2 is added
  2. The reaction mixture will become more brown as reaction is cooled
  3. The reaction mixture will become less brown as more N_2O is added

A) 1 only
B) 1 & 2
C) 2 & 3
D) 1 & 3
E) 1, 2 & 3

A

A

53
Q

Which of the following will increase the rate of a** reverse reaction**?
A) Increase in concentration of reactants
B) Increase in temperature
C) Addition of a solvent
D) All of the above
E) None of the above

A

B

54
Q

Which of the following reactions has a (+) delta H and a delta S ~ 0
A) H_2O (g) –> H_2O (l)
B) H_2O (s) –> H_2O (l)
C) H_2O (l) –> H_2O (g)
D) H_2O (l) –> H_2O (s)
E) H_2O (s) –> H_2O (g)

A

B

55
Q

The following spontaneous reaction is responsible for the cooling action of a cold pack:
Ba(OH)_2 10H_2O (s) + 2NH_4SCN (s) –> Ba(SCN)_2 (s) + 2 NH_3 (g) + 10 H_2O (l)

What is the sign of delta G for the reaction above?
Is the reaction exothermic or endothermic?
Which term is favorable, delta s or delta H?

A) Positive, exothermic, delta S
B) Positive, endothermic, delta H
C) Negative, exothermic, delta S
D) Negative, endothermic, delta H
E) Negative, endothermic, delta S

A

E

56
Q

Which of the following processes is exothermic?
A) combustion reactions
B) bond formation
C) evaporation
D) Bothe a and b are correct
E) a, b, and c are correct

A

D

57
Q

See screenshot. Answer the following questions and select the correct choice below: Which reaction has Keq &laquo_space;1?
Which reaction is endothermic?
Which reaction favors products at equilibrium?
A) 1, 1, 2
B) 1, 2, 2
C) 1, 2, 1
D) 2, 2, 1
E) 2, 2, 2

A

D

58
Q

Answer the following questions and select the correct choice below: Which reaction has the lower reverse activation energy? Which reaction will have the equilibrium shifted to products if heated?
A) 1, 1
B) 2, 2
C) 1, 2
D) 2, 1
E) Not enough information provided to answer the question

A

B

59
Q

Consider PbI_2 (s) dissolving in water. Calculate Ksp if the maximum solubility is 0.00130 M
A) 1
B) 0.00130
C) 1.69 x 10^-6
D) 2.20 x 10^-9
E) 8.79 x 10^-9

A

E

60
Q

How many grams of KOH (Ksp = 3.0 x 10^-6) will dissolve in 500mL of 0.040 M Ba(OH)_2 (aq)?
A) 3.74 x 10 ^-5
B) 2.1 x 10^-3
C) 1.05 x 10^-3
D) 0.020
E) 1.125

A

C

61
Q

Consider the following reaction: CO_2 (g) + CF_4 (g) –> 2 COF_2 (g) K =2.00 at 1000 C
In an equilibrium mixture, the concentration of COF_2 is 0.255 M, and the concentration of CF_4 is 0.118 M. What is the equilibrium concentration of CO_2?
A) 0 M
B) 0.275 M
C) 1.10 M
D) 2.45 M
E) 3.90 M

A

B

62
Q

See screenshot. What is the order of the reaction with respect to F_2 (g)?
A) 0
B) 0.5
C) 1
D) 2
E) 3

A

B

63
Q

See screenshot. what is the initial rate when [CH_3F] = 0.500 M and [F_2] = 0.500 M?
A) 0.078
B) 0.312
C) 0.442
D) 0.698
E) 1.396

A

C

64
Q

See screenshot. What concentration of F_2 (g) gives an initial rate of 0.224 M/s when [CH_3F] = 0.400 M?
A) 0.100
B) 0.200
C) 0.300
D) 0.400
E) 0.500

A

B

65
Q

How much faster does NH_3 effuse when compared with CCl_4?
A) 9-fold faster
B) 3-fold faster
C) They effuse at the same speed
D) CCl_4 effuses faster
E) Not enough information

A

B

66
Q

A large balloon filled with helium gas, occupying 293.1 L`at 24.8 C and 769.2 torr, is released. What volume (in L) would the ballon occupy when it reaches an altitude where conditions are -18.7 C and 383.6 torr?
A) 501.9 L
B) 293.1 L
C) 103.6 L
D) 51.8 L
E) Not enough information

A

A

67
Q

A gas in a 975 mL cylinder is at 835 torr. If the gas is compressed by a piston at 225 mL, what is the pressure of the gas (in atm)?
A) 0.55 atm
B) 1.10 atm
C) 2.38 atm
D) 4.76 atm
E) not enough information

A

D

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