According to the law of conservation of mass when Na, H, and O react to form a compound the mass of the compound will be

Equal to the sum of the masses of the reactants.

The molar mass of an element is numerically equal to...

The element's average atomic mass.

According to the law of definite proportions, any two samples of KCl will have...

The same elements in the same proportions by mass.

Which statement best describes an element?

A pure substance made up of only one kind of atom.

The average atomic mass of an element is...

The weighted average of all naturally occurring isotopes of the element.

A chemical compound can be defined as...

Any substance that has a definite composition.

How many electrons, protons, and neutrons are in this ion?

36 electrons, 35 protons, & 45 neutrons

The branch of chemistry called physical chemistry most likely would be used in determining the...

Amount of energy contained in a chemical bond.

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Chemistry First Semester Study Test (Chapters 1-7)

95 termsStudBud Administration19 plays

NOTE: I DID NOT DO THE BACK OF CH 1&2 TEST, DO THAT YOURSELF. I've also created a separate study guide WITH chapters 8 & 9. Also do this as if its a real test, each question has a lot of time, worry more about getting the right answers (4 mins for each question) and use your notes and textbook. If any of the answers are wrong please tell me FHCS Modern Chemistry Study Guide Test. Teacher: Bitikofer, Merv Textbook: "Modern Chemistry" by Holt McDougal Created December, 2023

Flashcards95 cardsFPractice quizPHost liveL

Questions 95

Answers

1
What is the shape of an NH₃ molecule
Trigonal Pyramidal
Tetrahedral
Bent or Angular
Linear
2
Give the formula for this compound: Hydrochloric Acid
(H2O)2
Hy Cl
HCl
OH
3
Matter includes all of the following except...
Water vapor
Light
Smoke
Air
4
Give the oxidation numbers for this element: KCl
K: -1 Cl: -2
K: +1 Cl: -1
K: -1 Cl: +1
K: +1 Cl: +1
5
According to the law of conservation of mass when Na, H, and O react to form a compound the mass of the compound will be
Equal to the sum of the masses of the reactants.
Greater than the sum of the masses of the reactants.
Either less than or equal to the sum of the masses of the reactants.
Less than the sum of the masses of the reactants.
6
Which of the following compounds does not contain a polyatomic ion?
Sodium Sulfate
Sodium Sulfite
Sodium Sulfide
Sodium Carbonate
7
Give the oxidation numbers for this element: MgSO₄
Mg: +2 S: -2 O: -2
Mg: +2 S: 0 O: -2
Mg: +2 S: +6 O: -2
Mg: +2 S: +2 O: -2
8
The word atom means...
Charged.
Energetic.
Indivisible.
Indestructible.
9
The molar mass of an element is numerically equal to...
The percentage composition of the element by mass.
The number of electrons possessed by an element.
The element's average atomic number.
The element's average atomic mass.
10
Name this compound: N₂O₅
Dinitrogen Oxide
2-nitrogen 5-oxide
Dinitrogen Pentoxide
Double Nitrogen Penta Oxygen
11
A polyatomic ion ending in "-ate" has 3 oxygen atoms. How many oxygen atoms should be in the "-ite" version?
0 Oxygen
4 Oxygen
2 Oxygen
3 Oxygen
12
Neutral atoms contain equal numbers of...
Electrons and neutrons
Protons and electrons
Protons and neutrons
Protons, electrons, and neutrons
13
Thomson's experiment showed that the charge of the particles in the cathode ray's were...
Negative
Positive
Depends on which terminal the cathode is connected to.
Neutral
14
Find the g/mol of this substance: O₂
Oxygen 2
32 g/mol
16 g/mol
2 g/mol
15
Name this compound: NaBr
Sodium Bromoxide
Sodium Bromine
Sodium Bromide
Sodium Brominium
16
Which are the sublevels in an energy level of n = 3?
s, d, and f
s, p, and d
p, d, and f
s, p and f
17
The units of molar mass are...
mol/g
g/mol
amu/g
amu/mol
18
The atomic symbol for beryllium (Be), indicates that the...
Atomic number is equal to 9 - 4
Atomic number is 9
Atomic number is 4
Mass number is 4
19
Give the formula for this compound: Calcium Iodide
CI
C2 I2
Ca Io2
Ca I2
20
Acetylene is C₂H₂. Benzene is C₆H₆. The Empirical formula for these compounds is...
C6H6
C2H2
CH
Different for each one
21
Organic chemistry is the study of...
Crystals and minerals.
Carbon-containing compounds.
The chemistry of living things.
Changes, and the relationships between energy and matter.
22
Give the oxidation numbers for this element: H₂O₂
H: +1 O: -1
H: +7 O: -1
H: +1 O: -2
H: -2 O: +1
23
Which of the folowing changes is a physical change of matter?
Paper burning
A nail rusting
Water evaporating
A silver spoon tarnishing
24
Give the electron configuration for Bismuth
[Xe] 6s2 4s14 5d10 6p2
[Xe] 6s2 4s14 5d13
[Xe] 6s2 4s14 5d10 5p3
[Xe] 6s2 4s14 5d10 6p3
25
What is the highest occupied energy level in an atom of strontium in its ground state?
n =4
n =5
n =3
n =6
26
Which of the following is the formula for Iron(III) Sulfate?
Fe2(SO4)3
Fe3(SO4)2
Fe3SO4
3FeSO4
27
The ratio of the mass of oxygen in CO2 to the mass of oxygen in CO is...
8:3
2:1
1:1
1:2
28
Find the g/mol of this substance: LiNO₃
~68.941 g/mol
~34.1 g/mol
~5 g/mol
~41.68 g/mol
29
According to the law of definite proportions, any two samples of KCl will have...
The same elements in the same proportions by mass.
Slightly different molecular structures but the same two elements.
Different densities.
The same mass.
30
Which statement best describes an element?
Any combination of two or more atoms of different types.
Any kind of crystal.
A substance that appears uniform in its composition.
A pure substance made up of only one kind of atom.
31
The average atomic mass of an element is...
The sum of the number of neutrons and protons in an atom.
The weighted average of all naturally occurring isotopes of the element.
The mass of one isotope of the element.
The same as the atomic number of the element.
32
Which of these is NOT part of the scientific method?
Forming an hypothesis
Testing by experimentation
Political persuasion
Falsifiability
33
How many protons, neutrons, and electrons are in a Silicon (Si-29) atom? Atomic number of Si is 14.
14, 15, 14
11, 8, 14
13, 8, 11
15, 15, 14
34
This electron configuration represents a ground-state atom of which element? 1s²2s²2p⁶3s²3p⁴
Selenium
Silicon
Oxygen
Sulfur
35
Which process is a chemical change?
Heating to boiling
Dissolving in alcohol
Burning in the air
Slicing into two pieces
36
A chemical compound can be defined as...
Any substance that is not alive.
A toxic substance.
An unnatural additive placed in food.
Any substance that has a definite composition.
37
Which of the following orbital notations for phosphorus is correct?
D
B
C
A
38
What is the correct electron configuration for a ground-state atom with 7 electrons?
1s2 2s5
1s2 2s2 2p2
1s2 2s2 2p2 3s1
1s2 2s2 2p3
39
Give the formula for this compound: Carbonic Acid
H2 CO3
CO3
H2(CO3)4
H2C3
40
How many electrons, protons, and neutrons are in this ion?
30 electrons, 26 protons, & 30 neutrons
36 electrons, 35 protons, & 45 neutrons
36 electrons, 35 protons, & 36 neutrons
36 electrons, 26 protons, & 30 neutrons
41
The branch of chemistry called physical chemistry most likely would be used in determining the...
Best way to refine crude oil into gasoline.
Amount of energy contained in a chemical bond.
Effect of a chemical compound on living things.
Economic effects of a new substance.
42
An atom of potassium has 19 protons and 20 neutrons. It's mass number is...
39
19
9
20
43
Find the g/mol of this substance: NaH
36 g/mol
23 g/mol
2 g/mol
24 g/mol
44
Which of the following is not equal to 1.00 mol of carbon-12?
Both B & C
6.0g of carbon
12.0g of carbon
6.022 × 1023 Carbon atoms
45
Compared with a mole of lead atoms, a mole of iron atoms...
Has the same number of atoms.
Has more atoms.
Has fewer atoms.
Cannot be determined because iron is magnetic.
46
Which particles give an atom its identity?
Electrons
Protons
Neutrons
47
Which of these atoms would you expect to have a higher electronegativity?
Mg
Fe
Cl
P
48
Find the Emperical Formula of this unknown substance: 1.49g of Manganese & 1.30g of Sulfur
MnS
Mn4S2
Mn4S3
MnS2
49
All metals have this property.
High density
Grey color
Hardness
Conductivity
50
Which atom has the highest electronegativity?
Hydrogen
Flourine
Nitrogen
Sodium
51
Which of the following types of electromagnetic radiation has the lowest frequency?
Microwaves
Ultraviolet light
X-rays
Infrared light
52
Would you expect iodine flakes (as a solid) to conduct electricity?
Yes, because it is originally a gas in the periodic table
Yes, becuase it is a solid.
No, because it is originally a gas in the periodic table
No, because it is a solid
53
What is the atomic number of the element with the noble-gas notation [Kr] 5s¹?
36
37
38
35
54
How much mass (in grams) does 0.30 moles of Lithium Nitrate have?
~21.11
21
20
~20.68
55
Looking at the periodic table & using your knowledge of trends, which of these would be expected to be the largest ion?
Bromine
Calcium
56
The least massive particle in an atom is the...
Neutron.
Proton.
Electron.
None of the above.
57
A measure of the quantity of matter is...
Weight
Volume
Mass
Density
58
Looking at the periodic table & using your knowledge of trends, which of these would be expected to be the largest atom?
Potassium
Selenium
59
Give the formula for this compound: Potassium Sulfate
K2 (SO3)2
K2 S4
K2 SO4
Po2 SO4
60
Name this compound: Mg(OH)₂
Magnesium Double HydroOxide
Magnesium Hydroxide
Magnesium Oxygen Hydrogen
Magnesium BiHydroxide
61
Which of these sets of sciences are all physical sciences? (Least like life sciences)
Geology, Meteorology, Physics, Chemistry
Biochemistry, Geology, Physics
Physics, Botany, Zoology
Organic Chemistry, Pharmacology, Astronomy
62
THe best definition of "theory" is...
Well-substantiated approach that explains most observations
undisputed explanation that has been proven
Speculation
Educated guess
63
What are the most significant intermolecular bonds that exist between ammonia molecules?
Linear
Atomic
Nitrogen
Hydrogen
64
If you wear glasses, you don't need to wear safety goggles.
False
True
65
To determine the mass in grams of ana tom of any element, you would...
Divide the mass of a mole of the element by Avogadro's number.
Add the mass of a mole of the element to Avogadro's number.
Multiply the mass of a mole of the element by Avogadro's number.
Subtract the mass of a mole of the element from Avogadro's number.
66
What does the prefix "hypo-" in front of a polyatomic ion's name mean?
The very highest oxidation state.
The very highest hydrogen state.
The very lowest oxidation state.
The very lowest hydrogen state.
67
Which atom has the second highest electronegativity?
Tin
Xenon
Nitrogen
Oxygen
68
Give the formula for this compound: Iron(II) Chloride
Fe2 Cl
Ir Cl2
Fe Cl2
Fe2 Cl2
69
The correct formula for ammonium phosphate is...
NH4PO4
(NH4)3PO4
Am(PO4)2
(NH4)2PO3
70
The oxidation number of N and H respectively in the NH₄¹⁺ ion is...
N: +3, H: -1
N: -5, H: +1
N: +5, H: -1
N: -3, H: +1
71
Which of these is an example of an element?
Oxygen
Sugar
Soil
Water
72
How many moles are in 14.00g of Sodium Chloride (NaCl)?
~0.123 mol
~0.24 mol
~0.23455 mol
~.24 mol
73
Which feature of Dalton's atomic theory is different from modern atomic theory?
Atoms cannot be subdivided.
Atoms cannot be destroyed.
Atoms combine in whole-number ratios.
Atoms cannot be rearranged in chemical reactions.
74
Which of these are ALL metals? (metalloids are not metal)
Zinc, Nitrogen, Iron, Potassium
Calcium, Iron, Potassium, Helium, Silicon
Zinc, Calcium, Iron, Potassium
Zinc, Nitrogen, Calcium, Helium,
75
Which is an example of a heterogeneous mixture?
Air
Mud
Salt
Nitrogen
76
How many valance electrons do the following atoms have?
Ca: 2 Si: 4 Cl: 7
Ca: 2 Si: 0 Cl: 7
Ca: 0 Si: 4 Cl: 1
Ca: 6 Si: 4 Cl: 1
77
Name this compound: K₂CO₃
Potassium Carbonation
Potassium Carbonate
Potassium Carboxide
Potassium Oxide
78
According to Einstein, which of the following can behave like a wave and also like a stream of particles?
A hydrogen atom in the ground state
Electromagnetic radiation
The atomic nucleus
A noble gas
79
A state of matter in which a material has no definite shape but has a definite volume is the ___ state.
Gas
Plasma
Liquid
Solid
80
Name this compound: H₂SO₄
Dihydrogen Sulfate
Dihydrogen Sulfur Tetraoxide
Dihydrogen Sulfite
2-Hydrogen 4 Sulfateoxide
81
Find the percent composition by mass of each element in: Cu(OH)₂
Cu: 65% O: 133% H: 2%
Cu: 75% O: 13% H: 12%
Cu: 33% O: 33% H: 65%
Cu: 65% O: 33% H: 2%
82
Which of the following is not one of the five principles of Dalton's Theory?
All atoms have similar physical and chemical properties.
Chem reactions consist of combination, separation or rearrangement of atoms
Atomsof diff elements combine insimple, wholenumber ratios toform compounds
All matter is made of indivisible, indestructible atoms.
83
How many electrons, protons, and neutrons are in this isotope?
26 electrons, 26 protons, & 30 neutrons
26 electrons, 30 protons, & 30 neutrons
26 electrons, 26 protons, & 26 neutrons
30 electrons, 26 protons, & 30 neutrons
84
The lowest energy state of an atom is it's...
Ground state.
Electron configuration.
Highest-occupired energy level.
Principle quantum number.
85
Rutherford's gold-foil experiment led him to conclude that...
Thomson's plum pudding model of the atom was accurate.
Alpha particles were a poor choice for a bombardment material.
Light was emitted by electrons returning to ground state.
A dense region of positive charge existed somewhere in the atom.
86
The diagram ↓ represents two electrons with...
Opposite spin states.
The same spin state.
Different energies.
The same energy.
87
A photon is emitted from a gaseous atom when an electron moves to its ground state from a(n)...
n = 0 State
Less energetic state.
Inner shell.
Excited state.
88
What is the correct noble-gas notation for the electron configuration of an atom of chlorine?
[Ar] 3s2 3p5
[Ne] 3s2 3p5
[Ar] 3s2 3p4
[Ne] 3s2 3p4
89
Sandals are fine to wear on lab days.
False
True
90
How many electrons are used to make a single covalent bond?
8
2
1
4
91
How many significant figures are in: 6004, 0.005030, & 280
4, 7, 3
4, 4, 2
2, 2, 2
4, 2, 3
92
Which of the following best describes how the speed of light works?
The speed of light is constant, regardless of frequency or wavelength.
It is lower for blue light than for red light.
The speed varies, being higher for blue light than for red light.
The speed of light varies according to the intensity of the photons.
93
Give the formula for this compound: Aluminum Nitrate
Al (NO3)3
Al (Ni3)3
Am (NO2)3
Al No3
94
How many of each element are in this atom: Ca₃(PO₄)₂?
Ca: 3 P: 1 O: 4
Ca: 3 P: 2 O: 4
Ca: 3 P: 2 O: 8
Ca: 3 P: 2 O: 16
95
Name this compound: CO_{2 (if you get this wrong...)}
Carbon Dioxide
Carbon Oxide
Carbon Double Oxide
Carbon 2-oxide

Chemistry First Semester Study Test (Chapters 1-7) Flashcards | StudBud

Chemistry First Semester Study Test (Chapters 1-7)

95 termsStudBud Administration19 plays

Flashcards95 cardsFPractice quizPHost liveL

Questions 95

Answers

1
What is the shape of an NH₃ molecule
Trigonal Pyramidal
Tetrahedral
Bent or Angular
Linear
2
Give the formula for this compound: Hydrochloric Acid
(H2O)2
Hy Cl
HCl
OH
3
Matter includes all of the following except...
Water vapor
Light
Smoke
Air
4
Give the oxidation numbers for this element: KCl
K: -1 Cl: -2
K: +1 Cl: -1
K: -1 Cl: +1
K: +1 Cl: +1
5
According to the law of conservation of mass when Na, H, and O react to form a compound the mass of the compound will be
Equal to the sum of the masses of the reactants.
Greater than the sum of the masses of the reactants.
Either less than or equal to the sum of the masses of the reactants.
Less than the sum of the masses of the reactants.
6
Which of the following compounds does not contain a polyatomic ion?
Sodium Sulfate
Sodium Sulfite
Sodium Sulfide
Sodium Carbonate
7
Give the oxidation numbers for this element: MgSO₄
Mg: +2 S: -2 O: -2
Mg: +2 S: 0 O: -2
Mg: +2 S: +6 O: -2
Mg: +2 S: +2 O: -2
8
The word atom means...
Charged.
Energetic.
Indivisible.
Indestructible.
9
The molar mass of an element is numerically equal to...
The percentage composition of the element by mass.
The number of electrons possessed by an element.
The element's average atomic number.
The element's average atomic mass.
10
Name this compound: N₂O₅
Dinitrogen Oxide
2-nitrogen 5-oxide
Dinitrogen Pentoxide
Double Nitrogen Penta Oxygen
11
A polyatomic ion ending in "-ate" has 3 oxygen atoms. How many oxygen atoms should be in the "-ite" version?
0 Oxygen
4 Oxygen
2 Oxygen
3 Oxygen
12
Neutral atoms contain equal numbers of...
Electrons and neutrons
Protons and electrons
Protons and neutrons
Protons, electrons, and neutrons
13
Thomson's experiment showed that the charge of the particles in the cathode ray's were...
Negative
Positive
Depends on which terminal the cathode is connected to.
Neutral
14
Find the g/mol of this substance: O₂
Oxygen 2
32 g/mol
16 g/mol
2 g/mol
15
Name this compound: NaBr
Sodium Bromoxide
Sodium Bromine
Sodium Bromide
Sodium Brominium
16
Which are the sublevels in an energy level of n = 3?
s, d, and f
s, p, and d
p, d, and f
s, p and f
17
The units of molar mass are...
mol/g
g/mol
amu/g
amu/mol
18
The atomic symbol for beryllium (Be), indicates that the...
Atomic number is equal to 9 - 4
Atomic number is 9
Atomic number is 4
Mass number is 4
19
Give the formula for this compound: Calcium Iodide
CI
C2 I2
Ca Io2
Ca I2
20
Acetylene is C₂H₂. Benzene is C₆H₆. The Empirical formula for these compounds is...
C6H6
C2H2
CH
Different for each one
21
Organic chemistry is the study of...
Crystals and minerals.
Carbon-containing compounds.
The chemistry of living things.
Changes, and the relationships between energy and matter.
22
Give the oxidation numbers for this element: H₂O₂
H: +1 O: -1
H: +7 O: -1
H: +1 O: -2
H: -2 O: +1
23
Which of the folowing changes is a physical change of matter?
Paper burning
A nail rusting
Water evaporating
A silver spoon tarnishing
24
Give the electron configuration for Bismuth
[Xe] 6s2 4s14 5d10 6p2
[Xe] 6s2 4s14 5d13
[Xe] 6s2 4s14 5d10 5p3
[Xe] 6s2 4s14 5d10 6p3
25
What is the highest occupied energy level in an atom of strontium in its ground state?
n =4
n =5
n =3
n =6
26
Which of the following is the formula for Iron(III) Sulfate?
Fe2(SO4)3
Fe3(SO4)2
Fe3SO4
3FeSO4
27
The ratio of the mass of oxygen in CO2 to the mass of oxygen in CO is...
8:3
2:1
1:1
1:2
28
Find the g/mol of this substance: LiNO₃
~68.941 g/mol
~34.1 g/mol
~5 g/mol
~41.68 g/mol
29
According to the law of definite proportions, any two samples of KCl will have...
The same elements in the same proportions by mass.
Slightly different molecular structures but the same two elements.
Different densities.
The same mass.
30
Which statement best describes an element?
Any combination of two or more atoms of different types.
Any kind of crystal.
A substance that appears uniform in its composition.
A pure substance made up of only one kind of atom.
31
The average atomic mass of an element is...
The sum of the number of neutrons and protons in an atom.
The weighted average of all naturally occurring isotopes of the element.
The mass of one isotope of the element.
The same as the atomic number of the element.
32
Which of these is NOT part of the scientific method?
Forming an hypothesis
Testing by experimentation
Political persuasion
Falsifiability
33
How many protons, neutrons, and electrons are in a Silicon (Si-29) atom? Atomic number of Si is 14.
14, 15, 14
11, 8, 14
13, 8, 11
15, 15, 14
34
This electron configuration represents a ground-state atom of which element? 1s²2s²2p⁶3s²3p⁴
Selenium
Silicon
Oxygen
Sulfur
35
Which process is a chemical change?
Heating to boiling
Dissolving in alcohol
Burning in the air
Slicing into two pieces
36
A chemical compound can be defined as...
Any substance that is not alive.
A toxic substance.
An unnatural additive placed in food.
Any substance that has a definite composition.
37
Which of the following orbital notations for phosphorus is correct?
D
B
C
A
38
What is the correct electron configuration for a ground-state atom with 7 electrons?
1s2 2s5
1s2 2s2 2p2
1s2 2s2 2p2 3s1
1s2 2s2 2p3
39
Give the formula for this compound: Carbonic Acid
H2 CO3
CO3
H2(CO3)4
H2C3
40
How many electrons, protons, and neutrons are in this ion?
30 electrons, 26 protons, & 30 neutrons
36 electrons, 35 protons, & 45 neutrons
36 electrons, 35 protons, & 36 neutrons
36 electrons, 26 protons, & 30 neutrons
41
The branch of chemistry called physical chemistry most likely would be used in determining the...
Best way to refine crude oil into gasoline.
Amount of energy contained in a chemical bond.
Effect of a chemical compound on living things.
Economic effects of a new substance.
42
An atom of potassium has 19 protons and 20 neutrons. It's mass number is...
39
19
9
20
43
Find the g/mol of this substance: NaH
36 g/mol
23 g/mol
2 g/mol
24 g/mol
44
Which of the following is not equal to 1.00 mol of carbon-12?
Both B & C
6.0g of carbon
12.0g of carbon
6.022 × 1023 Carbon atoms
45
Compared with a mole of lead atoms, a mole of iron atoms...
Has the same number of atoms.
Has more atoms.
Has fewer atoms.
Cannot be determined because iron is magnetic.
46
Which particles give an atom its identity?
Electrons
Protons
Neutrons
47
Which of these atoms would you expect to have a higher electronegativity?
Mg
Fe
Cl
P
48
Find the Emperical Formula of this unknown substance: 1.49g of Manganese & 1.30g of Sulfur
MnS
Mn4S2
Mn4S3
MnS2
49
All metals have this property.
High density
Grey color
Hardness
Conductivity
50
Which atom has the highest electronegativity?
Hydrogen
Flourine
Nitrogen
Sodium
51
Which of the following types of electromagnetic radiation has the lowest frequency?
Microwaves
Ultraviolet light
X-rays
Infrared light
52
Would you expect iodine flakes (as a solid) to conduct electricity?
Yes, because it is originally a gas in the periodic table
Yes, becuase it is a solid.
No, because it is originally a gas in the periodic table
No, because it is a solid
53
What is the atomic number of the element with the noble-gas notation [Kr] 5s¹?
36
37
38
35
54
How much mass (in grams) does 0.30 moles of Lithium Nitrate have?
~21.11
21
20
~20.68
55
Looking at the periodic table & using your knowledge of trends, which of these would be expected to be the largest ion?
Bromine
Calcium
56
The least massive particle in an atom is the...
Neutron.
Proton.
Electron.
None of the above.
57
A measure of the quantity of matter is...
Weight
Volume
Mass
Density
58
Looking at the periodic table & using your knowledge of trends, which of these would be expected to be the largest atom?
Potassium
Selenium
59
Give the formula for this compound: Potassium Sulfate
K2 (SO3)2
K2 S4
K2 SO4
Po2 SO4
60
Name this compound: Mg(OH)₂
Magnesium Double HydroOxide
Magnesium Hydroxide
Magnesium Oxygen Hydrogen
Magnesium BiHydroxide
61
Which of these sets of sciences are all physical sciences? (Least like life sciences)
Geology, Meteorology, Physics, Chemistry
Biochemistry, Geology, Physics
Physics, Botany, Zoology
Organic Chemistry, Pharmacology, Astronomy
62
THe best definition of "theory" is...
Well-substantiated approach that explains most observations
undisputed explanation that has been proven
Speculation
Educated guess
63
What are the most significant intermolecular bonds that exist between ammonia molecules?
Linear
Atomic
Nitrogen
Hydrogen
64
If you wear glasses, you don't need to wear safety goggles.
False
True
65
To determine the mass in grams of ana tom of any element, you would...
Divide the mass of a mole of the element by Avogadro's number.
Add the mass of a mole of the element to Avogadro's number.
Multiply the mass of a mole of the element by Avogadro's number.
Subtract the mass of a mole of the element from Avogadro's number.
66
What does the prefix "hypo-" in front of a polyatomic ion's name mean?
The very highest oxidation state.
The very highest hydrogen state.
The very lowest oxidation state.
The very lowest hydrogen state.
67
Which atom has the second highest electronegativity?
Tin
Xenon
Nitrogen
Oxygen
68
Give the formula for this compound: Iron(II) Chloride
Fe2 Cl
Ir Cl2
Fe Cl2
Fe2 Cl2
69
The correct formula for ammonium phosphate is...
NH4PO4
(NH4)3PO4
Am(PO4)2
(NH4)2PO3
70
The oxidation number of N and H respectively in the NH₄¹⁺ ion is...
N: +3, H: -1
N: -5, H: +1
N: +5, H: -1
N: -3, H: +1
71
Which of these is an example of an element?
Oxygen
Sugar
Soil
Water
72
How many moles are in 14.00g of Sodium Chloride (NaCl)?
~0.123 mol
~0.24 mol
~0.23455 mol
~.24 mol
73
Which feature of Dalton's atomic theory is different from modern atomic theory?
Atoms cannot be subdivided.
Atoms cannot be destroyed.
Atoms combine in whole-number ratios.
Atoms cannot be rearranged in chemical reactions.
74
Which of these are ALL metals? (metalloids are not metal)
Zinc, Nitrogen, Iron, Potassium
Calcium, Iron, Potassium, Helium, Silicon
Zinc, Calcium, Iron, Potassium
Zinc, Nitrogen, Calcium, Helium,
75
Which is an example of a heterogeneous mixture?
Air
Mud
Salt
Nitrogen
76
How many valance electrons do the following atoms have?
Ca: 2 Si: 4 Cl: 7
Ca: 2 Si: 0 Cl: 7
Ca: 0 Si: 4 Cl: 1
Ca: 6 Si: 4 Cl: 1
77
Name this compound: K₂CO₃
Potassium Carbonation
Potassium Carbonate
Potassium Carboxide
Potassium Oxide
78
According to Einstein, which of the following can behave like a wave and also like a stream of particles?
A hydrogen atom in the ground state
Electromagnetic radiation
The atomic nucleus
A noble gas
79
A state of matter in which a material has no definite shape but has a definite volume is the ___ state.
Gas
Plasma
Liquid
Solid
80
Name this compound: H₂SO₄
Dihydrogen Sulfate
Dihydrogen Sulfur Tetraoxide
Dihydrogen Sulfite
2-Hydrogen 4 Sulfateoxide
81
Find the percent composition by mass of each element in: Cu(OH)₂
Cu: 65% O: 133% H: 2%
Cu: 75% O: 13% H: 12%
Cu: 33% O: 33% H: 65%
Cu: 65% O: 33% H: 2%
82
Which of the following is not one of the five principles of Dalton's Theory?
All atoms have similar physical and chemical properties.
Chem reactions consist of combination, separation or rearrangement of atoms
Atomsof diff elements combine insimple, wholenumber ratios toform compounds
All matter is made of indivisible, indestructible atoms.
83
How many electrons, protons, and neutrons are in this isotope?
26 electrons, 26 protons, & 30 neutrons
26 electrons, 30 protons, & 30 neutrons
26 electrons, 26 protons, & 26 neutrons
30 electrons, 26 protons, & 30 neutrons
84
The lowest energy state of an atom is it's...
Ground state.
Electron configuration.
Highest-occupired energy level.
Principle quantum number.
85
Rutherford's gold-foil experiment led him to conclude that...
Thomson's plum pudding model of the atom was accurate.
Alpha particles were a poor choice for a bombardment material.
Light was emitted by electrons returning to ground state.
A dense region of positive charge existed somewhere in the atom.
86
The diagram ↓ represents two electrons with...
Opposite spin states.
The same spin state.
Different energies.
The same energy.
87
A photon is emitted from a gaseous atom when an electron moves to its ground state from a(n)...
n = 0 State
Less energetic state.
Inner shell.
Excited state.
88
What is the correct noble-gas notation for the electron configuration of an atom of chlorine?
[Ar] 3s2 3p5
[Ne] 3s2 3p5
[Ar] 3s2 3p4
[Ne] 3s2 3p4
89
Sandals are fine to wear on lab days.
False
True
90
How many electrons are used to make a single covalent bond?
8
2
1
4
91
How many significant figures are in: 6004, 0.005030, & 280
4, 7, 3
4, 4, 2
2, 2, 2
4, 2, 3
92
Which of the following best describes how the speed of light works?
The speed of light is constant, regardless of frequency or wavelength.
It is lower for blue light than for red light.
The speed varies, being higher for blue light than for red light.
The speed of light varies according to the intensity of the photons.
93
Give the formula for this compound: Aluminum Nitrate
Al (NO3)3
Al (Ni3)3
Am (NO2)3
Al No3
94
How many of each element are in this atom: Ca₃(PO₄)₂?
Ca: 3 P: 1 O: 4
Ca: 3 P: 2 O: 4
Ca: 3 P: 2 O: 8
Ca: 3 P: 2 O: 16
95
Name this compound: CO_{2 (if you get this wrong...)}
Carbon Dioxide
Carbon Oxide
Carbon Double Oxide
Carbon 2-oxide