CHEM 120 Chamberlain EXAM 1 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Chemistry - CORRECT ANSWER The study of the properties of
matter and how matter changes
Basic Unit in Chemistry - CORRECT ANSWER atom
Types of Chemistry - CORRECT ANSWER Green Chemistry
Sustainable Chemistry
green chemistry - CORRECT ANSWER uses materials and
processes that are intended to prevent or reduce pollution at its
source
replacing rare hazardous with more abundant less hazardous
Example of green chemistry - CORRECT ANSWER replacement of
mercury fluorescent light bulbs with efficient mercury free light bulbs
Green Chemistry Solar Fuels - CORRECT ANSWER sunlight is
abundant source of energy
plants store solar energy as chemical energy via photosynthesis
artificial photosynthesis - CORRECT ANSWER can be used to
generate hydrogen fuel
H fuel can then be reacted with O to produce heat and electricity
water---->hydrogen + oxygen
sustainable chemistry - CORRECT ANSWER designed to meet the
needs of the present generation without compromising the needs of
future generations
,Matter - CORRECT ANSWER Anything that has mass and takes up
space
mass - CORRECT ANSWER A measure of the amount of matter in
an object
weight - CORRECT ANSWER A measure of the gravitational force
exerted on the matter of an object.
Classes of Matter - CORRECT ANSWER Solids, Liquids, Gas
Solid - CORRECT ANSWER Definite shape and volume
vibration
ice, brick, wood,
liquid - CORRECT ANSWER A state of matter that has no definite
shape but has a definite volume.
move in irregular pattern
petrol, vinegar, paint, water
gas - CORRECT ANSWER A state of matter with no definite shape
or volume
freely move continuously- far apart
helium, oxygen, carbon monoxide, hydrogen
melting point - CORRECT ANSWER The temperature at which a
solid becomes a liquid
Vaporation - CORRECT ANSWER Liquid to gas
boiling Point - CORRECT ANSWER temp at which liquid escapes
and becomes a gas
condensation - CORRECT ANSWER Gas to liquid
freezing - CORRECT ANSWER liquid to solid
,occurs at freezing point/same as melting point
Sublimation - CORRECT ANSWER A change directly from the solid
to the gaseous state without becoming liquid
Ex: dry ice
2 categories of matter - CORRECT ANSWER substances and
mixtures
Substance - CORRECT ANSWER A single kind of matter that is
pure and has a specific set of properties.
Substance contains - CORRECT ANSWER Elements and
Compounds
Elements - CORRECT ANSWER A molecule composed of one kind
of atom; cannot be broken into simpler units by chemical reactions.
represented by chemical groups:
Cl, H, Mg
Compounds - CORRECT ANSWER 2 or more elements chemically
combined
many exist as groups of atoms bonded together as molecules
Atoms - CORRECT ANSWER Building blocks of matter
smallest particle in an element
Aristotle - CORRECT ANSWER A Greek Philosopher,
all matter is composed of 4 elements
all matter is continuous not atomistic
WEAF- water, earth, air, water
Atomos - CORRECT ANSWER Lecuippus/democritus
point at which matter can no longer be subdivided
, Mixtures - CORRECT ANSWER A combination of two or more
substances that are not chemically combined
homogeneous mixture - CORRECT ANSWER a mixture that is
uniform in composition; components are evenly distributed and not
easily distinguished
Ex: sugar and water
heterogeneous mixture - CORRECT ANSWER A mixture that is not
uniform in composition; components are not evenly distributed
throughout the mixture
Ex: oil and water
Measurement of Matter - CORRECT ANSWER mass
Measurements of length - CORRECT ANSWER meters
1 m= 100 cm
1000 m=1 km
0.0254 m = 1 inch
Measurement of mass - CORRECT ANSWER kilograms
0.454 kg=1 lbs
1 kg= 2.2 lbs
.001 kg= 1 g
1g= 1000 mg
Measurement of volume - CORRECT ANSWER liter (L)
1 gal = 3.79 L
.26 gal= 1 L
1000 ml = 1 L
measurement of time - CORRECT ANSWER seconds
measurement of temperature - CORRECT ANSWER Kelvin (K)
Amount of substance - CORRECT ANSWER mole (mol)
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Chemistry - CORRECT ANSWER The study of the properties of
matter and how matter changes
Basic Unit in Chemistry - CORRECT ANSWER atom
Types of Chemistry - CORRECT ANSWER Green Chemistry
Sustainable Chemistry
green chemistry - CORRECT ANSWER uses materials and
processes that are intended to prevent or reduce pollution at its
source
replacing rare hazardous with more abundant less hazardous
Example of green chemistry - CORRECT ANSWER replacement of
mercury fluorescent light bulbs with efficient mercury free light bulbs
Green Chemistry Solar Fuels - CORRECT ANSWER sunlight is
abundant source of energy
plants store solar energy as chemical energy via photosynthesis
artificial photosynthesis - CORRECT ANSWER can be used to
generate hydrogen fuel
H fuel can then be reacted with O to produce heat and electricity
water---->hydrogen + oxygen
sustainable chemistry - CORRECT ANSWER designed to meet the
needs of the present generation without compromising the needs of
future generations
,Matter - CORRECT ANSWER Anything that has mass and takes up
space
mass - CORRECT ANSWER A measure of the amount of matter in
an object
weight - CORRECT ANSWER A measure of the gravitational force
exerted on the matter of an object.
Classes of Matter - CORRECT ANSWER Solids, Liquids, Gas
Solid - CORRECT ANSWER Definite shape and volume
vibration
ice, brick, wood,
liquid - CORRECT ANSWER A state of matter that has no definite
shape but has a definite volume.
move in irregular pattern
petrol, vinegar, paint, water
gas - CORRECT ANSWER A state of matter with no definite shape
or volume
freely move continuously- far apart
helium, oxygen, carbon monoxide, hydrogen
melting point - CORRECT ANSWER The temperature at which a
solid becomes a liquid
Vaporation - CORRECT ANSWER Liquid to gas
boiling Point - CORRECT ANSWER temp at which liquid escapes
and becomes a gas
condensation - CORRECT ANSWER Gas to liquid
freezing - CORRECT ANSWER liquid to solid
,occurs at freezing point/same as melting point
Sublimation - CORRECT ANSWER A change directly from the solid
to the gaseous state without becoming liquid
Ex: dry ice
2 categories of matter - CORRECT ANSWER substances and
mixtures
Substance - CORRECT ANSWER A single kind of matter that is
pure and has a specific set of properties.
Substance contains - CORRECT ANSWER Elements and
Compounds
Elements - CORRECT ANSWER A molecule composed of one kind
of atom; cannot be broken into simpler units by chemical reactions.
represented by chemical groups:
Cl, H, Mg
Compounds - CORRECT ANSWER 2 or more elements chemically
combined
many exist as groups of atoms bonded together as molecules
Atoms - CORRECT ANSWER Building blocks of matter
smallest particle in an element
Aristotle - CORRECT ANSWER A Greek Philosopher,
all matter is composed of 4 elements
all matter is continuous not atomistic
WEAF- water, earth, air, water
Atomos - CORRECT ANSWER Lecuippus/democritus
point at which matter can no longer be subdivided
, Mixtures - CORRECT ANSWER A combination of two or more
substances that are not chemically combined
homogeneous mixture - CORRECT ANSWER a mixture that is
uniform in composition; components are evenly distributed and not
easily distinguished
Ex: sugar and water
heterogeneous mixture - CORRECT ANSWER A mixture that is not
uniform in composition; components are not evenly distributed
throughout the mixture
Ex: oil and water
Measurement of Matter - CORRECT ANSWER mass
Measurements of length - CORRECT ANSWER meters
1 m= 100 cm
1000 m=1 km
0.0254 m = 1 inch
Measurement of mass - CORRECT ANSWER kilograms
0.454 kg=1 lbs
1 kg= 2.2 lbs
.001 kg= 1 g
1g= 1000 mg
Measurement of volume - CORRECT ANSWER liter (L)
1 gal = 3.79 L
.26 gal= 1 L
1000 ml = 1 L
measurement of time - CORRECT ANSWER seconds
measurement of temperature - CORRECT ANSWER Kelvin (K)
Amount of substance - CORRECT ANSWER mole (mol)
