Description
问题2
25
Chemistry is the study of matter and its transformations. Let’s consider a scenario in
which a pure solid decomposes on heating, yielding a solid and a gas, each of which is
a pure substance. From this we can conclude with certainty that
the original solid is not an element.
at least one of the products is an element.
both products are compounds.
both products are elements.
2
Which representation shows the correct curve for the potential energy of an electron
vs. distance from a proton?
Potential energy
O
Distance between particles
Potential energy
Distance between particles
O
Potential energy
Distance between particles
Potential energy
Distance between particles
问题4
25
Carbon-14 and Nitrogen-14 both have the same mass number, yet they are different
elements. Which of the following statements is true?
Carbon-14 and Nitrogen-14 have the same number of protons.
Carbon-14 and Nitrogen-14 have different numbers of protons and neutrons.
Carbon-14 and Nitrogen-14 are isotopes.
Carbon-14 and Nitrogen-14 have the same number of neutrons.
问题5
25
An unidentified element Xz consists of two naturally occurring isotopes having masses
of 100.0 amu and 102.0 amu. A sample of Xz was found to contain 25.0% of 100Xz and
75.0% of 102Xz. What is the atomic mass of Xz?
101.5 amu
100.3 amu
100.5 amu
101.0 amu
问题6
25
What is the atomic mass of an element if 4.00 grams of it contain 2.98 x 1022 atoms?
8.08 amu
80.8 amu
19.7 amu
20.2 amu
问题7
2
When vanillin, C3H8O3, is combusted, what are the coefficients in the correctly
balanced equation? Type in your numerical answers (do not leave blanks).
C8H8O3(1) +
O2(g) →
CO2(g) +
H2O(g)
问题8
25
a
Winter is almost here! How many H2O molecules are there in a snowflake that weighs
4.0 x 10-4 g?
1.3 x 1019
X
2.2 x 10-5
6.02 x 1023
2.4 x 1020
问题9
2
Which is the correct chemical formula / systematic name combination?
Cu2O
copper(ll) oxide
As 04
tetraarsenic hexaoxide
N204
nitrogen tetroxide
Hgs
mercury(II) sulfide
问题 10
25
The empirical formula for a hydrocarbon is found to be CH2 by elemental analysis. In a
separate experiment, the molar mass is determined to be approximately 84 g/mol.
What is the number of hydrogens in the molecular formula of the hydrocarbon?
6
O
16
O
20
O
12
What is the frequency of the light wave shown below?
0-
NY
4
nm
6
3.0 x 1017 Hz
1.0 x 1017 Hz
1.5 x 1017 Hz
2.0 x 1017 Hz
问题 12
25
A scientist in another universe (identical in all respects to our own except for the value
of Planck’s constant), shines electromagnetic radiation of wavelength 2.00 x10-1 m on
a metal with a work function of 5.36 x 10-19 J. Electrons are ejected from the metal,
but their maximum kinetic energy is zero. What is the value of Planck’s constant as
determined from this experiment?
2.63 x 10-28 J’s
6.63 x 10-34
Jis
6.17 x 10-28 Jis
3.57 x 10
-28
J’s
ХОУС
问题 13
25
mus126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Uncertainty Principle
[$]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
Pauli Exclusion Principle
Hund’s Rule
[选择]
Planck’s Hypothesis
[选择]
XOY
D
问题 13
25
mus126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Uncertainty Principle
【选择】
shine
Pauli Exclusion Principle
[ ]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
Hund’s Rule
Planck’s Hypothesis
[it]
S SOLUTION: 2 free
Х
测验: Final Assessn X
unlockchegg.com/ | G What is the freque x +
It’s har
faces
1/courses/30107/quizzes/87048/take
LI
..
Planck’s Hypothesis
[选择]
ХО
问题 14
29
A hydrogen atom makes a transition from the n = 6 to n = 4 state. During this process,
a
✓
a photon a
is [8]
[&]
1.82 x 10^-19) J
1.36 x 10(^-19) J
7.54 x 10(^-20) J
6.06 x 10(^-20) J
shine
问题15
29
ХОУС
问题 13
25
mus126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Uncertainty Principle
[$]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
Pauli Exclusion Principle
Hund’s Rule
[选择]
Planck’s Hypothesis
[选择]
XOY
D
问题 13
25
mus126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Uncertainty Principle
【选择】
shine
Pauli Exclusion Principle
[ ]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
Hund’s Rule
Planck’s Hypothesis
[it]
ХОУС
D
问题 13
2
mus126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Uncertainty Principle
[选择]
shine
Pauli Exclusion Principle
【选择】
Hund’s Rule
✓
[4]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
Planck’s Hypothesis
XOYO
D
问题 13
29
mus 126 final
Below are several principles or concepts and descriptions that we discussed together
as a class this quarter. Which answer correctly matches the entries in the two
columns?
Heisenberg Unce
inty
nciple
[选择]
LI
shine
Pauli Exclusion Principle
[选择]
Hund’s Rule
[选择]
V
Planck’s Hypothesis
[%]
Bodies can lose energy only in quantized amounts.
Electrons fill orbitals of the same energy singly, and with parallel spins, before pairing.
The electrons in a given atom must differ in the value of at least one of their 4 quantum numbers.
It is impossible to determine simultaneously the position and speed of a particle to any degree of accuracy.
问题14
25
S SOLUTION: 2 free
Х
测验: Final Assessn X
unlockchegg.com/ | G What is the freque x +
It’s har
faces
1/courses/30107/quizzes/87048/take
LI
..
Planck’s Hypothesis
[选择]
ХО
问题 14
29
A hydrogen atom makes a transition from the n = 6 to n = 4 state. During this process,
a
✓
a photon a
is [8]
[&]
1.82 x 10^-19) J
1.36 x 10(^-19) J
7.54 x 10(^-20) J
6.06 x 10(^-20) J
shine
问题15
29
问题 15
25
Consider an atom traveling at 1% of the speed of light (3.00 x 108 m/s). The de Broglie
wavelength is found to be 4.15 x 10-15 m. Which element does the atom represent?
Sulfur, S
Phosphorus, P
Fluorine, F
Helium, He
earning
у
问题 16
29
In the quantum mechanical (wave) model of the atom, the shell with principal quantum
number 3 is comprised o
[ist]
subshells, a total of
s and p
[i£\]
s, p, d and f
s, p, and d
d with a maximum of
port
S
选择
electrons.
grity
ces
问题17
O Helium, He
is and
ily two
earning
ry
问题 16
2)
In the quantum mechanical (wave) model of the atom, the shell with principal quantum
number 3 is comprised of [217]
subshells, a total of
✓
[it]
orbitals, and may be filled with a maximum of
port
CO WOO
6
3
18
electrons.
egrity
rces
问题17
23
Fluorine, F
O Helium, He
is and
ly two.
Learning
ery
问题 16
2
In the quantum mechanical (wave) model of the atom, the shell with principal quantum
number 3 is comprised of [$$]
subshells, a total of
[is]
Y_orbitals, and may be filled with a maximum of
pport
electrons.
egrity
v [选择]
8
18
rces
复制
9
2
D
问题17
2
问题17
2.
.
a
An orbital is a wavefunction, y, defined by quantum numbers (n, l, mi) that is a region
of space occupied by an electron. What would be a correct set of quantum numbers
for the following orbital in the second shell?
Z
х
y
O
n = 2, 1 = 0, mi = 0
n = 3,1 = 2, mj = 0
n = 2,1 = 1, mı = 0
O n = 3,1 = 1, mi = 0
问题 18
2
Which one of the following statements regarding electron configurations is
INCORRECT?
2s1 represents an excited state of a Hatom.
Tin (Sn) has 36 core electrons.
O [Ar]3d5 represents the ground state of a Fe3+ ion.
O [He]2s22p3 represents the ground state of a nitrogen atom.
问题 19
2
Which one of the following statements regarding periodic properties is FALSE?
O has a lower first ionization energy than N.
O Li has a higher electron affinity that F.
O Mg has a lower effective nuclear charge than P.
O Br atoms are smaller than As atoms.
Di alumTIS are SITlalter lilaITAS atomTIS.
问题 20
29
According to its Lewis structure, the molecular ion ICl4 has an electron (group)
and a shape that is
arrangement that i [i£\]
seesaw
tetrahedral
「选择」
T-shaped
square planar
trigonal bipyramidal
octahedral
问题 20
25
According to its Lewis structure, the molecular ion ICl4 has an electron (group)
arrangement that is [i$*]
and a shape that is
✓
[4]
octahedral
seesaw
trigonal bipyramidal
tetrahedral
square planar
T-shaped
问题 21
25
Which of the following is the correct order for molecules (shown below) from most to
least polar?
H
CI
CI
F
ddddd
HIC
C/
H
HY
H
H
Note: “=” represents same polarity
CF2Cl2 > CF2H2 > CCl2H2 > CCl4 = CH4
=
CF2Cl2 = CF2H2 = CC12H2 > CCl4 = CH4
=
=
CH4 > CF2H2 > CF2Cl2 > CCl4 > CCI2H2
CF2H2 > CCI2H2 > CF2Cl2 > CCl4 = CH4
>
=
>
问题 22
25
Which molecule may be represented by the following electrostatic potential map?
NF3
BF3
NH3
BH3
问题 23
25
Below is featured the molecular structure of the amino acid cysteine, with 3 different
bond angles denoted by the labels a, b, and c.
:0:
H
b
H
с
a
BM
H-
C—C
C
SCH
NH2H
Ideally, the bond angle marked a is [$}}]
v , b is
【选择】
and c is [$j]
问题 24
25
Identify the correct order of increasing magnitude of lattice energy (from smallest
lattice energy to largest) for the following ionic compounds: NaBr, KBr, MgO and KI
[$$]
[选择
[$]
v
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