Chemistry D425 Verified Multiple Choice and Conceptual Actual Emended Exam
Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
How is matter classified? pure substances and mixtures
number of representative particles in a
Avogadro's number
mole, 6.02 X 10^23
Words like atom, particles, molecules,
use Avogadro's number 6.02x10^23
formula units mean?
the system of measurement used in the
Imperial System
United States
A substance that cannot be broken down
What is an element?
into simpler substances
pure substance that contains more than
What is an compound? one element and can be broken down
into chemically simpler components
is a physical blend of two or more pure
What is a mixture? substances where each retains its own
identity and properties in the mixture
What are the three phases of matter? solid, liquid, gas
What is matter composed of? atoms
How is energy transferred? heat and work
What is the motion of energy? kinetic energy
what is resting energy? potential energy
a group of two or more atoms held to-
What is a molecule ?
gether by chemical bonds
physical changes DO NOT alter the com-
Is matter affected by physical changes?
position of matter
Chemical changes transform matter in
Is matter affected by chemical changes ? such a way that the identity or chemical
substance changes
matter can neither be created nor de-
What is the law of conservation of mass?
stroyed
bonding electron pair two electrons shared between atoms
What are core electrons? inner electrons core shell
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78
, Chemistry D425 Verified Multiple Choice and Conceptual Actual Emended Exam
Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
bond formed by the sharing of electrons
What are colvalent bonds? between nonmetals
example: H2O, NH3
valance electrons electrons in the outermost shell
the elements in Group 8A of the periodic
noble gases
table
an atom will be more stable when sur-
octet rule rounded by eight electrons in the valence
shell
an atom or molecule with a net electric
What is a ion? charge due to the loss or gain of one or
more electrons.
Length
Mass
Temperature
Time
You should know the base unit measure- Amount of a substance
ment Electric current
Luminous intensity
bonds that occur between a metal and
What are ionic bonds?
non metal
What are cations? positively charged ions
What are anions? negatively charged ions
An atom or a group of atoms that carries
an electrical charge
What is the definition of an ion?
Explanation: Ions are charged atoms.
Atoms become ions when they gain or
lose electrons
covalently bonded molecules with weak
What are discrete molecules ?
intermolecular forces
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78
, Covalent bonds tend to form between
What are covalent bonds?
two atoms classified as non-metals
In a covalent bond electrons are? shared
Solids have a shape and a
definite shape and volume
volume.
definite volume but no definite shape be-
Liquids have a but no cause they adopt the shape of the con-
tainer
Gases have No definite or
shape or volume
a mixture that is uniform in composition;
Homogeneous mixture components are evenly distributed and
not easily distinguished
A mixture that is not uniform in composi-
Heterogeneous mixture tion; components are not evenly distrib-
uted throughout the mixture
saltwater, air, mayonnaise, milk, fog,
examples of homogeneous mixtures
lemonade
salad dressing, chex mix, rocks, salad,
examples of heterogeneous mixtures
chicken noodle soup
No definite shape
No definite volume
What are the characteristics of gases?
particles are separated and move ran-
domly in the space
energy that is stored until you chose to
What is potential energy?
use it
What is kinetic energy? energy of motion
Energy stored in chemical bonds that
What is chemical potential energy?
make up matter
the energy can transform from one to
Law of Conservation of Energy
another but the total remains the same
chemical reaction to form new sub-
What is a reactant?
stances
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78
, A substance produced in a chemical re-
What is a product?
action
a characteristic that can be observed or
What is physical property ? measured without changing the identity
of the substance
color, size, shape, solubility, electrical
examples of physical property conductivity, density, melting point, boil-
ing point
A property that depends on the type of
What is intensive property? matter in a sample, not the amount of
matter
examples of intensive property density, temperature, color
the ability of a substance to undergo a
What is chemical property?
specific chemical change
the ability of a substance to burn, cook,
examples of chemical property?
rust, tarnish, decompose
The calculation of quantities in chemical
Stoichiometry
reactions
in a balanced equation, the ratio between
Mole ratio the numbers of moles of any two sub-
stances
both sides of the equation have the same
balanced reaction
number of atoms of each element
aqueous solution a solution in which water is the solvent
a substance that gives ions when dis-
Electrolyte
solved in water
a compound is insoluble in water when
Insoluble
its solubility is less than 0.01 ml/L
a substance in solution that smaller than
Solute
the amount
describes how a mixture can be classi-
physical state of a solution
fied, either solution, solvent, or solute
Unsaturated solution
4/
78
Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
How is matter classified? pure substances and mixtures
number of representative particles in a
Avogadro's number
mole, 6.02 X 10^23
Words like atom, particles, molecules,
use Avogadro's number 6.02x10^23
formula units mean?
the system of measurement used in the
Imperial System
United States
A substance that cannot be broken down
What is an element?
into simpler substances
pure substance that contains more than
What is an compound? one element and can be broken down
into chemically simpler components
is a physical blend of two or more pure
What is a mixture? substances where each retains its own
identity and properties in the mixture
What are the three phases of matter? solid, liquid, gas
What is matter composed of? atoms
How is energy transferred? heat and work
What is the motion of energy? kinetic energy
what is resting energy? potential energy
a group of two or more atoms held to-
What is a molecule ?
gether by chemical bonds
physical changes DO NOT alter the com-
Is matter affected by physical changes?
position of matter
Chemical changes transform matter in
Is matter affected by chemical changes ? such a way that the identity or chemical
substance changes
matter can neither be created nor de-
What is the law of conservation of mass?
stroyed
bonding electron pair two electrons shared between atoms
What are core electrons? inner electrons core shell
1/
78
, Chemistry D425 Verified Multiple Choice and Conceptual Actual Emended Exam
Questions With Reviewed 100% Correct Detailed Answers
Guaranteed Pass!!Current Update
bond formed by the sharing of electrons
What are colvalent bonds? between nonmetals
example: H2O, NH3
valance electrons electrons in the outermost shell
the elements in Group 8A of the periodic
noble gases
table
an atom will be more stable when sur-
octet rule rounded by eight electrons in the valence
shell
an atom or molecule with a net electric
What is a ion? charge due to the loss or gain of one or
more electrons.
Length
Mass
Temperature
Time
You should know the base unit measure- Amount of a substance
ment Electric current
Luminous intensity
bonds that occur between a metal and
What are ionic bonds?
non metal
What are cations? positively charged ions
What are anions? negatively charged ions
An atom or a group of atoms that carries
an electrical charge
What is the definition of an ion?
Explanation: Ions are charged atoms.
Atoms become ions when they gain or
lose electrons
covalently bonded molecules with weak
What are discrete molecules ?
intermolecular forces
2/
78
, Covalent bonds tend to form between
What are covalent bonds?
two atoms classified as non-metals
In a covalent bond electrons are? shared
Solids have a shape and a
definite shape and volume
volume.
definite volume but no definite shape be-
Liquids have a but no cause they adopt the shape of the con-
tainer
Gases have No definite or
shape or volume
a mixture that is uniform in composition;
Homogeneous mixture components are evenly distributed and
not easily distinguished
A mixture that is not uniform in composi-
Heterogeneous mixture tion; components are not evenly distrib-
uted throughout the mixture
saltwater, air, mayonnaise, milk, fog,
examples of homogeneous mixtures
lemonade
salad dressing, chex mix, rocks, salad,
examples of heterogeneous mixtures
chicken noodle soup
No definite shape
No definite volume
What are the characteristics of gases?
particles are separated and move ran-
domly in the space
energy that is stored until you chose to
What is potential energy?
use it
What is kinetic energy? energy of motion
Energy stored in chemical bonds that
What is chemical potential energy?
make up matter
the energy can transform from one to
Law of Conservation of Energy
another but the total remains the same
chemical reaction to form new sub-
What is a reactant?
stances
3/
78
, A substance produced in a chemical re-
What is a product?
action
a characteristic that can be observed or
What is physical property ? measured without changing the identity
of the substance
color, size, shape, solubility, electrical
examples of physical property conductivity, density, melting point, boil-
ing point
A property that depends on the type of
What is intensive property? matter in a sample, not the amount of
matter
examples of intensive property density, temperature, color
the ability of a substance to undergo a
What is chemical property?
specific chemical change
the ability of a substance to burn, cook,
examples of chemical property?
rust, tarnish, decompose
The calculation of quantities in chemical
Stoichiometry
reactions
in a balanced equation, the ratio between
Mole ratio the numbers of moles of any two sub-
stances
both sides of the equation have the same
balanced reaction
number of atoms of each element
aqueous solution a solution in which water is the solvent
a substance that gives ions when dis-
Electrolyte
solved in water
a compound is insoluble in water when
Insoluble
its solubility is less than 0.01 ml/L
a substance in solution that smaller than
Solute
the amount
describes how a mixture can be classi-
physical state of a solution
fied, either solution, solvent, or solute
Unsaturated solution
4/
78
