To determine the limiting reactant in a chemical reaction, one must know the

avaliable amount of each reactant

What can be predicted by using an activity series?

if a certain chemical reaction will occur

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GEN CHEM MEGA REVIEW

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Questions 99

Answers

1
The following is the lewis structure for which molecule?
NH4
NH2
NH3
NH
2
A single displacement reaction has the form: AX+BY--> AY+BX
True
False
3
A particle in the nucleus that has about the same mass as a proton
nucleus
electron
neutron
proton
4
1 cubic centimeter is equivalent to
1 gram
1 liter
1 milliliter
10 cubic decimeters
5
Which of the following is the equation for density?
d=\frac{v}{m}
d= m+ V
d= m x V
d=\frac{m}{v}
6
Which is the formula for hydrochloric acid
HCl
HClO3
H2CLO3
H3CLO
7
Stoichiometry is the branch of chemistry that deals with the ______ between elements and compounds in a reaction
Physical interactions
Energy transfers
Bonding
Numerical relationships
8
To indicate resonance, a _______ is placed between a molecule's resonance structures
long dash
single headed arrow
double-headed arrow
series of three dots
9
The correct Lewis structure for a fluorine atom in a molecule of F₂ shows
three unshared pairs of electrons
All of the above
an octet of valence electrons
one shared pair of electrons
10
What type of reaction is this? 2Al + 3CuCl2 --> 2AlCl3+ 3Cu
Decomposition
Synthesis
Double displacement
Single Displacement
11
Since the boiling point of H2O is higher than C2H2, you can conclude that ____ is composed of a more polar molecule
C2H2
H2O
12
The composition of two oxides of lead, PbO and PbO₂ are explained by the
Law of multiple proportions
atomic law
law of conservation of mass
periodic law
13
Ice melting is an example of a
energy
physical change
chemical change
an exothermic process
14
How many significant figures are in the number 186.050
6
4
5
3
15
If electrons in an atom have the lowest possible energies, the electrons are in their
inert states
ground state
radiation emitting states
excited states
16
For an electron in an atom to change from the ground state to an excited state,
radiation must be emitted
the electron must make a transition from a higher to lower energy level
energy must be released
energy must be absorbed
17
Which of the following is not a way a mixture can be seperated?
oxidation
handpicking
evaporation
filtration
18
The main energy levels of an atom are indicated by the
orbital quantum number
magnetic quantum number
principal quantum number
spin quantum number
19
If you are given grams and you need to get into moles, which conversion are you using?
mole ratio
moles
molar mass
coefficents
20
What acid does Nitrate come from?
Nitrous Acid
Nitride Acid
Nitrate acid
Nitric Acid
21
The state of matter for a reactant or a product in a chem reaction is indicated by a
subscript after the formula
coefficeint before the formula
subscript before the formula
symbol after the formula
22
Distinct colored lines produced from gas emissions are called
ground state
line-emission spectra
excited state
electromagnetic spectra
23
Which metal will have the lowest temperature at the same conditions based on these specific heats?
Gold: 0.126J/(g*K)
Iron: 0.449 J/(g*K)
aluminum: 0.897 J/(g*K)
Magnesium: 1.02 J/(g*K)
24
A chemical reaction in which the flask feels cold after is
endothermic
physical
hear
exothermic
25
What is the name of a list of elements arranged according to the case with which they undergo certain chemical reactions
periodic list
reaction sequence
reactivity list
activity series
26
What conversion factor would you use to get from moles to atoms
6.022 x 10 23 atoms/mol
6.022 x 10 23 g/mol
6.022 x 10 23 g
6.022 x 10 23 mol
27
In the reaction Ca + Cl₂ --> CaCl₂, what is the mole ratio of chlorine to calcium chloride?
1:2
2:3
2:1
1:1
28
Molar Mass can be used to relate
Mass of reactant to moles of reactant
All of the above
mass of product to moles of product
Moles of reactant to moles of product
29
the abbreviation of atomic mass unit is
mu
amu
u
a
30
Convert 3.00g Mg to mol Mg
72.9mol Mg
0.123mol Mg
3 mol Mg
8 mol Mg
31
According to the VSEPR theory, the molecular shape of CO₂ is classified as
trigonal planar
linear
bent
trigonal pyramidal
32
"In any chemical or physical process, enrgy is neither created nor destroyed" is a statement of
systems
law of conservation of mass
law of conservation of energy
law of physical and chemical change
33
To determine the limiting reactant in a chemical reaction, one must know the
amount of product formed
speed of the reaction
avaliable amount of one of the reactants
avaliable amount of each reactant
34
This is the lewis structure for H₂O₂
True
False
35
Most of the volume of an atom is occupied by the
nuclides
nucleus
protons
electron cloud
36
7 darts all strike near the target. Whoever threw the dart is
accurate
neither accurate or precise
precise
both accurate and precise
37
Which of the following number of atoms can form a tetrahedral molecule
4
2
5
3
38
To draw the lewis structure of polyatomic ion, CLO^-₃ , you would have to ______ the structures
subtract one electron from
add a proton to
Add one electron to
subtract a proton from
39
The mole ratio of iron (iii) oxide to iron is? 4Fe+3O₂-->2Fe₂O₃
1:2
4:1
1:1
2:3
40
Phosphate has a charge of 3-
True
False
41
According to the VSEPR theory, a molecule with the molecular formula A₂ is
A dipole
bent
tetrahedral
linear in shape
42
Energy is defined as
The capacity to do work
something that cannot be explained
none of the above
matter
43
Why do two electrons in the same orbital have to have different spin quantum numbers
magnetic rule
Aufbau principle
Hund's rule
Pauli exclusion principle
44
The specific heat of a substance
is unique to that substance
depends on the mass of the substance
varies with temperature
is the same as that for any other substance
45
What is the molar mass of K₂CO₃
138.20 g/mol
122.17 g/mol
99.10 g/mol
110.17 g/mol
46
What can be predicted by using an activity series?
if a certain chemical reaction will occur
the melting point of elements
The amount of energy released
electronegativity values of elements
47
The statement that an electron occupies the lowest avaliable energy orbital is
Hund's rule
Aufbau Principle
The Pauli Exclusion Principle
Bohr's Law
48
A covalent bond in which two atoms share three pairs of electrons is called a(n) _____ bond
Triple
Ionic
Double
Single
49
How many neutrons are in the following atom? B-10
6
5
3
4
50
A chemical reaction in which energy is absorbed is
physical
exothermic
endothermic
hear
51
Where do electrons have their lowest energy?
in the s orbital
in the n=3 energy level
excited state
ground state
52
The letter designations for the first four sublevels , with the number of electrons that can be held in each sublevel:
s:1 p:3 d:10 f:14
s:2 p:6 d:10 f14:
s:1 p:3 d:5 f:7
s: 1 p:2 d:3 f:4
53
If, in the reaction A+B--> C+D, the quantity of B is insufficent to react with all of A,
B is the limiting reactant
A is the limiting reactant
Both a and b are the limiting reactant
Neither a or b are the limiting reactant
54
Which metal will get the hottest based on these specific heats?
Gold: 0.126 J/(g*K)
Iron: 0.449 J/(g*K)
Magnesium: 1.02 J/(g*K)
aluminum: 0.897 J/(g*K)
55
Elements in Group 13 have a charge of
5-
3-
3+
13-
56
Two electrons in the 1s orbital muct have different spin quantum numbers to satisfy
the aufbau principle
the magnetic rule
The pauli exclusion principle
Hund's rule
57
Matter includes all of the following except
light
air
water vapor
smoke
58
Which is correctly balanced: Al + CuCl₂ --> AlCl₃+ Cu
Al +2CuCl2 --> 2AlCl3+ 2Cu
3Al + 2CuCl2 --> 2AlCl3+ Cu
Al + CuCl2 --> AlCl3+ Cu
2Al + 3CuCl2 --> 2AlCl3+ 3Cu
59
Which of the following is a pure substance?
Vinegar (5% acetic acid)
Vitamin C (ascorbic acid)
bread dough
seawater
60
Elements in Group 2 have a charge of
2+
1+
1-
2-
61
What is the central atom in CH₃ OH
the second Hydrogen
Carbon
Oxygen
the first Hydrogen
62
All the components being studied at any given time form
surroundings
Transfer of energy
conservation of energy
a system
63
To balance a chemical equation, it may be necessary to adjust the
subscripts
number of products
coefficients
formulas of the products
64
The coefficients in a chemical equation represent the
relative numbers of moles of the reactants and products
number of valence electrons involved in the reaction
masses, in grams, of all reactants and products
number of atoms of atoms in each compound in a reaction
65
An Ionic bond is most likely to form between two elements that have a difference in electronegativity values of ___
1.5
0.1
1.0
3.0
66
A covalent bond in which two atoms share one pair of electrons is called a ________ bond
triple
ionic
double
single
67
What are the units when you divide 3056Kg by 200mL
Kg x mL
Kg/mL
Kg
mL
68
According to VSEPR theory, the moleculear shape of H₂O is classified as
trigonal planar
trigonal pyramidal
bent
linear
69
As the difference in electronegativity _______ the degree of polarity between the bonds increases
Increases
Decreases
70
What is the formula for Iron (III) oxide?
Fe3O2
FeO3
FeO
Fe2O3
71
Which is the correct prefix for 4
tri
tetra
di
penta
72
Isotopes of an element contain different numbers of
protons
electrons
nuclides
neutrons
73
The actual yield must be measured experimentally
True
False
74
A chemical rxn has not occurred if the products have
less energy than the reactants
the same chemical properties as the reactants
the same mass as the reactants
more energy than the reactants
75
The bond length is the average distance between the _____ of two bonded atoms
bonds
nuclei
valence electrons
inner electrons
76
In a double bond, two atoms share a total of ____ electrons
3
6
2
4
77
Convert 20g of Mg to g of MgO
40g MgO
0.020g MgO
33.17g MgO
0.82g MgO
78
An insoluble solid produced by a chemical reaction in solution is called
a molecule
a reactant
a precipitate
the mass of the product
79
A reaction of a hydrocarbon in which CO2 and H2O are produced is called a...
decomp
double displacement
synthesis
combustion
80
A plausible explanation of a body of observed natural phenomena is a scientific
Theory
Law
experiment
principle
81
A(n) __________ reactant is not completely used up in a chemical reaction
limiting
excess
Product
Theoretical
82
A chemical reaction involving substances A and B stops when B is completely used. B is the...
primary product
primary reactant
Excess reactant
limiting reactant
83
When vinegar and baking soda combine and form carbon dioxide gas, this is an example of a(n)
energy
chemical change
exothermic process
physical change
84
What is the measured amount of product obtained from a chemical reaction?
percentage yield
mole ratio
theoretical yield
actual yield
85
What are the units for molar mass
atoms/mol
g/mol
atoms/g
elements/mol
86
How many significant figures are in the number 0.000405 kg
6
5
4
3
87
Which is the correct name for BrO
Monobromine Monoxide
Bromine Monoxide
Bromine Dioxide
Bromine Oxide
88
The Carbon-12 atom is assigned a relative mass of exactly
1 amu
6 amu
100 amu
12 amu
89
Convert 20g of Mg to moles of MgO
0.82 mol
2 mol
486 mol
0.41mol
90
Which of the following compounds is most likely to have the least bond energy?
Cl2 : Cl-Cl bond length= 199pm
HCl; H-Cl bond length= 127 pm
HF; H-F bond length=92pm
I2 : I-I bond length=266pm
91
In a covalent bond, shared electrons move within a space called a(n) _______ orbital
atomic
molecular
ionic
bonded
92
Which is the correct formula for Trinitrogen Pentoxide?
N3O5
N2O4
NO
N5O3
93
A chemical change occurs when
salt deposits from evaporated seawater
ethanol is purified through distillation
dissolved minerals solidify to form crystals
a leaf changes color
94
An atom as 4 protons, 4 electrons and 3 neutrons... What is its mass?
8
12
11
7
95
How would you report the answer 0.0378 g with two significant figures?
0.0378 g
0.037 g
0.03 g
0.038 g
96
Which abbriviation represents a volume unit
mm
mL
mg
cm
97
If the theoretical yield is 9.08g and the percentage yield is 88.1%, what is the actual yield?
4.00g
8.00g
7.2g
792g
98
A particle in the nucleus that has no charge and only affects mass
neutron
nucleus
electron
proton
99
What is the correct expression for precentage yield
(actual yield/theoretical yield)x 100
(percentage yield/theoretical yield) x 100
(theoretical yield/actual yield) x 100
(percentage yield/actual yield) x 100

GEN CHEM MEGA REVIEW Flashcards | StudBud

GEN CHEM MEGA REVIEW

99 termsStudBud Administration10 plays

Imported from external platform

Flashcards99 cardsFPractice quizPHost liveL

Questions 99

Answers

1
The following is the lewis structure for which molecule?
NH4
NH2
NH3
NH
2
A single displacement reaction has the form: AX+BY--> AY+BX
True
False
3
A particle in the nucleus that has about the same mass as a proton
nucleus
electron
neutron
proton
4
1 cubic centimeter is equivalent to
1 gram
1 liter
1 milliliter
10 cubic decimeters
5
Which of the following is the equation for density?
d=\frac{v}{m}
d= m+ V
d= m x V
d=\frac{m}{v}
6
Which is the formula for hydrochloric acid
HCl
HClO3
H2CLO3
H3CLO
7
Stoichiometry is the branch of chemistry that deals with the ______ between elements and compounds in a reaction
Physical interactions
Energy transfers
Bonding
Numerical relationships
8
To indicate resonance, a _______ is placed between a molecule's resonance structures
long dash
single headed arrow
double-headed arrow
series of three dots
9
The correct Lewis structure for a fluorine atom in a molecule of F₂ shows
three unshared pairs of electrons
All of the above
an octet of valence electrons
one shared pair of electrons
10
What type of reaction is this? 2Al + 3CuCl2 --> 2AlCl3+ 3Cu
Decomposition
Synthesis
Double displacement
Single Displacement
11
Since the boiling point of H2O is higher than C2H2, you can conclude that ____ is composed of a more polar molecule
C2H2
H2O
12
The composition of two oxides of lead, PbO and PbO₂ are explained by the
Law of multiple proportions
atomic law
law of conservation of mass
periodic law
13
Ice melting is an example of a
energy
physical change
chemical change
an exothermic process
14
How many significant figures are in the number 186.050
6
4
5
3
15
If electrons in an atom have the lowest possible energies, the electrons are in their
inert states
ground state
radiation emitting states
excited states
16
For an electron in an atom to change from the ground state to an excited state,
radiation must be emitted
the electron must make a transition from a higher to lower energy level
energy must be released
energy must be absorbed
17
Which of the following is not a way a mixture can be seperated?
oxidation
handpicking
evaporation
filtration
18
The main energy levels of an atom are indicated by the
orbital quantum number
magnetic quantum number
principal quantum number
spin quantum number
19
If you are given grams and you need to get into moles, which conversion are you using?
mole ratio
moles
molar mass
coefficents
20
What acid does Nitrate come from?
Nitrous Acid
Nitride Acid
Nitrate acid
Nitric Acid
21
The state of matter for a reactant or a product in a chem reaction is indicated by a
subscript after the formula
coefficeint before the formula
subscript before the formula
symbol after the formula
22
Distinct colored lines produced from gas emissions are called
ground state
line-emission spectra
excited state
electromagnetic spectra
23
Which metal will have the lowest temperature at the same conditions based on these specific heats?
Gold: 0.126J/(g*K)
Iron: 0.449 J/(g*K)
aluminum: 0.897 J/(g*K)
Magnesium: 1.02 J/(g*K)
24
A chemical reaction in which the flask feels cold after is
endothermic
physical
hear
exothermic
25
What is the name of a list of elements arranged according to the case with which they undergo certain chemical reactions
periodic list
reaction sequence
reactivity list
activity series
26
What conversion factor would you use to get from moles to atoms
6.022 x 10 23 atoms/mol
6.022 x 10 23 g/mol
6.022 x 10 23 g
6.022 x 10 23 mol
27
In the reaction Ca + Cl₂ --> CaCl₂, what is the mole ratio of chlorine to calcium chloride?
1:2
2:3
2:1
1:1
28
Molar Mass can be used to relate
Mass of reactant to moles of reactant
All of the above
mass of product to moles of product
Moles of reactant to moles of product
29
the abbreviation of atomic mass unit is
mu
amu
u
a
30
Convert 3.00g Mg to mol Mg
72.9mol Mg
0.123mol Mg
3 mol Mg
8 mol Mg
31
According to the VSEPR theory, the molecular shape of CO₂ is classified as
trigonal planar
linear
bent
trigonal pyramidal
32
"In any chemical or physical process, enrgy is neither created nor destroyed" is a statement of
systems
law of conservation of mass
law of conservation of energy
law of physical and chemical change
33
To determine the limiting reactant in a chemical reaction, one must know the
amount of product formed
speed of the reaction
avaliable amount of one of the reactants
avaliable amount of each reactant
34
This is the lewis structure for H₂O₂
True
False
35
Most of the volume of an atom is occupied by the
nuclides
nucleus
protons
electron cloud
36
7 darts all strike near the target. Whoever threw the dart is
accurate
neither accurate or precise
precise
both accurate and precise
37
Which of the following number of atoms can form a tetrahedral molecule
4
2
5
3
38
To draw the lewis structure of polyatomic ion, CLO^-₃ , you would have to ______ the structures
subtract one electron from
add a proton to
Add one electron to
subtract a proton from
39
The mole ratio of iron (iii) oxide to iron is? 4Fe+3O₂-->2Fe₂O₃
1:2
4:1
1:1
2:3
40
Phosphate has a charge of 3-
True
False
41
According to the VSEPR theory, a molecule with the molecular formula A₂ is
A dipole
bent
tetrahedral
linear in shape
42
Energy is defined as
The capacity to do work
something that cannot be explained
none of the above
matter
43
Why do two electrons in the same orbital have to have different spin quantum numbers
magnetic rule
Aufbau principle
Hund's rule
Pauli exclusion principle
44
The specific heat of a substance
is unique to that substance
depends on the mass of the substance
varies with temperature
is the same as that for any other substance
45
What is the molar mass of K₂CO₃
138.20 g/mol
122.17 g/mol
99.10 g/mol
110.17 g/mol
46
What can be predicted by using an activity series?
if a certain chemical reaction will occur
the melting point of elements
The amount of energy released
electronegativity values of elements
47
The statement that an electron occupies the lowest avaliable energy orbital is
Hund's rule
Aufbau Principle
The Pauli Exclusion Principle
Bohr's Law
48
A covalent bond in which two atoms share three pairs of electrons is called a(n) _____ bond
Triple
Ionic
Double
Single
49
How many neutrons are in the following atom? B-10
6
5
3
4
50
A chemical reaction in which energy is absorbed is
physical
exothermic
endothermic
hear
51
Where do electrons have their lowest energy?
in the s orbital
in the n=3 energy level
excited state
ground state
52
The letter designations for the first four sublevels , with the number of electrons that can be held in each sublevel:
s:1 p:3 d:10 f:14
s:2 p:6 d:10 f14:
s:1 p:3 d:5 f:7
s: 1 p:2 d:3 f:4
53
If, in the reaction A+B--> C+D, the quantity of B is insufficent to react with all of A,
B is the limiting reactant
A is the limiting reactant
Both a and b are the limiting reactant
Neither a or b are the limiting reactant
54
Which metal will get the hottest based on these specific heats?
Gold: 0.126 J/(g*K)
Iron: 0.449 J/(g*K)
Magnesium: 1.02 J/(g*K)
aluminum: 0.897 J/(g*K)
55
Elements in Group 13 have a charge of
5-
3-
3+
13-
56
Two electrons in the 1s orbital muct have different spin quantum numbers to satisfy
the aufbau principle
the magnetic rule
The pauli exclusion principle
Hund's rule
57
Matter includes all of the following except
light
air
water vapor
smoke
58
Which is correctly balanced: Al + CuCl₂ --> AlCl₃+ Cu
Al +2CuCl2 --> 2AlCl3+ 2Cu
3Al + 2CuCl2 --> 2AlCl3+ Cu
Al + CuCl2 --> AlCl3+ Cu
2Al + 3CuCl2 --> 2AlCl3+ 3Cu
59
Which of the following is a pure substance?
Vinegar (5% acetic acid)
Vitamin C (ascorbic acid)
bread dough
seawater
60
Elements in Group 2 have a charge of
2+
1+
1-
2-
61
What is the central atom in CH₃ OH
the second Hydrogen
Carbon
Oxygen
the first Hydrogen
62
All the components being studied at any given time form
surroundings
Transfer of energy
conservation of energy
a system
63
To balance a chemical equation, it may be necessary to adjust the
subscripts
number of products
coefficients
formulas of the products
64
The coefficients in a chemical equation represent the
relative numbers of moles of the reactants and products
number of valence electrons involved in the reaction
masses, in grams, of all reactants and products
number of atoms of atoms in each compound in a reaction
65
An Ionic bond is most likely to form between two elements that have a difference in electronegativity values of ___
1.5
0.1
1.0
3.0
66
A covalent bond in which two atoms share one pair of electrons is called a ________ bond
triple
ionic
double
single
67
What are the units when you divide 3056Kg by 200mL
Kg x mL
Kg/mL
Kg
mL
68
According to VSEPR theory, the moleculear shape of H₂O is classified as
trigonal planar
trigonal pyramidal
bent
linear
69
As the difference in electronegativity _______ the degree of polarity between the bonds increases
Increases
Decreases
70
What is the formula for Iron (III) oxide?
Fe3O2
FeO3
FeO
Fe2O3
71
Which is the correct prefix for 4
tri
tetra
di
penta
72
Isotopes of an element contain different numbers of
protons
electrons
nuclides
neutrons
73
The actual yield must be measured experimentally
True
False
74
A chemical rxn has not occurred if the products have
less energy than the reactants
the same chemical properties as the reactants
the same mass as the reactants
more energy than the reactants
75
The bond length is the average distance between the _____ of two bonded atoms
bonds
nuclei
valence electrons
inner electrons
76
In a double bond, two atoms share a total of ____ electrons
3
6
2
4
77
Convert 20g of Mg to g of MgO
40g MgO
0.020g MgO
33.17g MgO
0.82g MgO
78
An insoluble solid produced by a chemical reaction in solution is called
a molecule
a reactant
a precipitate
the mass of the product
79
A reaction of a hydrocarbon in which CO2 and H2O are produced is called a...
decomp
double displacement
synthesis
combustion
80
A plausible explanation of a body of observed natural phenomena is a scientific
Theory
Law
experiment
principle
81
A(n) __________ reactant is not completely used up in a chemical reaction
limiting
excess
Product
Theoretical
82
A chemical reaction involving substances A and B stops when B is completely used. B is the...
primary product
primary reactant
Excess reactant
limiting reactant
83
When vinegar and baking soda combine and form carbon dioxide gas, this is an example of a(n)
energy
chemical change
exothermic process
physical change
84
What is the measured amount of product obtained from a chemical reaction?
percentage yield
mole ratio
theoretical yield
actual yield
85
What are the units for molar mass
atoms/mol
g/mol
atoms/g
elements/mol
86
How many significant figures are in the number 0.000405 kg
6
5
4
3
87
Which is the correct name for BrO
Monobromine Monoxide
Bromine Monoxide
Bromine Dioxide
Bromine Oxide
88
The Carbon-12 atom is assigned a relative mass of exactly
1 amu
6 amu
100 amu
12 amu
89
Convert 20g of Mg to moles of MgO
0.82 mol
2 mol
486 mol
0.41mol
90
Which of the following compounds is most likely to have the least bond energy?
Cl2 : Cl-Cl bond length= 199pm
HCl; H-Cl bond length= 127 pm
HF; H-F bond length=92pm
I2 : I-I bond length=266pm
91
In a covalent bond, shared electrons move within a space called a(n) _______ orbital
atomic
molecular
ionic
bonded
92
Which is the correct formula for Trinitrogen Pentoxide?
N3O5
N2O4
NO
N5O3
93
A chemical change occurs when
salt deposits from evaporated seawater
ethanol is purified through distillation
dissolved minerals solidify to form crystals
a leaf changes color
94
An atom as 4 protons, 4 electrons and 3 neutrons... What is its mass?
8
12
11
7
95
How would you report the answer 0.0378 g with two significant figures?
0.0378 g
0.037 g
0.03 g
0.038 g
96
Which abbriviation represents a volume unit
mm
mL
mg
cm
97
If the theoretical yield is 9.08g and the percentage yield is 88.1%, what is the actual yield?
4.00g
8.00g
7.2g
792g
98
A particle in the nucleus that has no charge and only affects mass
neutron
nucleus
electron
proton
99
What is the correct expression for precentage yield
(actual yield/theoretical yield)x 100
(percentage yield/theoretical yield) x 100
(theoretical yield/actual yield) x 100
(percentage yield/actual yield) x 100