CHEM 1120 Final Review – Full Chemistry Exam Prep, Notes & Practice
Test
chemistry - ANS ✔✔the study of matter and the changes it undergoes
*composition, structure, properties, and reaction of substances*
chemicals - ANS ✔✔substances that have the same composition and properties whenever
found
scientific method - ANS ✔✔the process of making observations, proposing a hypothesis, and
testing the hypothesis; after repeated experiments validate the hypothesis, it may become a
theory
observations - ANS ✔✔information determined by noting and recording a natural phenomenon
hypothesis - ANS ✔✔an unverified explanation of natural phenomenon
experiment - ANS ✔✔a procedure that tests the validity of a hypothesis
conclusion - ANS ✔✔an explanation of an observation that has been validated by repeated
experiments that support a hypothesis
calculating a percentage - ANS ✔✔divide parts by whole x 100%
graph - ANS ✔✔represents the relationship between two variables
x axis: horizontal (independent)
y axis: vertical
,direct relationship: x increases, so does y
scientific notation - ANS ✔✔a number in scientific notation contains a coefficient and a power
of 10
*number is less than one, the power is negative*
*number is more than one, the power is positive*
theory - ANS ✔✔an explanation for an observation supported by additional experiments that
confirm the hypothesis
length
volume
mass
temperature
time - ANS ✔✔meter (m)
L - metric, cubic meter (m^3) - SI
gram (g), kilogram (kg) - SI
Celsius (c), Kevin (k) -SI
second (s)
measurements - ANS ✔✔1m = 100 cm
2.54 cm = 1in
1L = 1.06qt
1mL = 1cm^3 = 1cc
1kg = 2.2Ibs
1000cm^3 = 1000mL = 1L
1ppm = 1 part / 1million parts
,Ppb = mcg / kg
1 atm = 760mmHg
760 torr = 760 mmHg
standard temp (T) = 273K
standard pressure (P) = 1 atm
temperature equations - ANS ✔✔¤°F = (9/5 x °C) + 32
¤K = °C + 273
C = (F - 32) x
C = K - 273
measured numbers - ANS ✔✔numbers obtained when you measure a quantity such as your
height, weight, or temperature. An equality between metric and U.S units are considered
measurements
significant figures - ANS ✔✔are all nonzero digits and zeros between digits.
are not zeros that act as placeholders before digits.
are zeros at the end of a decimal number.
exact numbers - ANS ✔✔not measured and do NOT limit the number of significant figures
not used to find the number of significant figures in a calculated answer.
A counting number (138 students)
definitions (1in=2.54 cm)
Conversions within the same measuring system (1km=1000m)
measured numbers: addition and subtraction - ANS ✔✔the final answer is written so that it has
the same number of decimal places as the measurement with the fewest decimal places
, equalities - ANS ✔✔written for relationships between units of the metric system, U.S, or
between metric and U.S units
*exception 1in = 2.54cm is an exact relationship*
18% body fat by mass can be written as - ANS ✔✔18kg body fat / 100kg body mass
or
100kg body mass / 18kg body fat
density
mass
volume - ANS ✔✔m/v (density)
d x v (mass)
m / d (volume)
g/mL (liquids)
g/cm^3 (solids)
g/L (gases)
density using volume displacement - ANS ✔✔the density of a solid is calculated by dividing its
mass by its displaced volume. to determine its displaced volume, submerge the solid in water so
that it displaces water that is = to its own volume
specific gravity - ANS ✔✔is a ratio of the density of a substance to the density of water at the
same temperature
sp gr = density of sample
/ density of water
Test
chemistry - ANS ✔✔the study of matter and the changes it undergoes
*composition, structure, properties, and reaction of substances*
chemicals - ANS ✔✔substances that have the same composition and properties whenever
found
scientific method - ANS ✔✔the process of making observations, proposing a hypothesis, and
testing the hypothesis; after repeated experiments validate the hypothesis, it may become a
theory
observations - ANS ✔✔information determined by noting and recording a natural phenomenon
hypothesis - ANS ✔✔an unverified explanation of natural phenomenon
experiment - ANS ✔✔a procedure that tests the validity of a hypothesis
conclusion - ANS ✔✔an explanation of an observation that has been validated by repeated
experiments that support a hypothesis
calculating a percentage - ANS ✔✔divide parts by whole x 100%
graph - ANS ✔✔represents the relationship between two variables
x axis: horizontal (independent)
y axis: vertical
,direct relationship: x increases, so does y
scientific notation - ANS ✔✔a number in scientific notation contains a coefficient and a power
of 10
*number is less than one, the power is negative*
*number is more than one, the power is positive*
theory - ANS ✔✔an explanation for an observation supported by additional experiments that
confirm the hypothesis
length
volume
mass
temperature
time - ANS ✔✔meter (m)
L - metric, cubic meter (m^3) - SI
gram (g), kilogram (kg) - SI
Celsius (c), Kevin (k) -SI
second (s)
measurements - ANS ✔✔1m = 100 cm
2.54 cm = 1in
1L = 1.06qt
1mL = 1cm^3 = 1cc
1kg = 2.2Ibs
1000cm^3 = 1000mL = 1L
1ppm = 1 part / 1million parts
,Ppb = mcg / kg
1 atm = 760mmHg
760 torr = 760 mmHg
standard temp (T) = 273K
standard pressure (P) = 1 atm
temperature equations - ANS ✔✔¤°F = (9/5 x °C) + 32
¤K = °C + 273
C = (F - 32) x
C = K - 273
measured numbers - ANS ✔✔numbers obtained when you measure a quantity such as your
height, weight, or temperature. An equality between metric and U.S units are considered
measurements
significant figures - ANS ✔✔are all nonzero digits and zeros between digits.
are not zeros that act as placeholders before digits.
are zeros at the end of a decimal number.
exact numbers - ANS ✔✔not measured and do NOT limit the number of significant figures
not used to find the number of significant figures in a calculated answer.
A counting number (138 students)
definitions (1in=2.54 cm)
Conversions within the same measuring system (1km=1000m)
measured numbers: addition and subtraction - ANS ✔✔the final answer is written so that it has
the same number of decimal places as the measurement with the fewest decimal places
, equalities - ANS ✔✔written for relationships between units of the metric system, U.S, or
between metric and U.S units
*exception 1in = 2.54cm is an exact relationship*
18% body fat by mass can be written as - ANS ✔✔18kg body fat / 100kg body mass
or
100kg body mass / 18kg body fat
density
mass
volume - ANS ✔✔m/v (density)
d x v (mass)
m / d (volume)
g/mL (liquids)
g/cm^3 (solids)
g/L (gases)
density using volume displacement - ANS ✔✔the density of a solid is calculated by dividing its
mass by its displaced volume. to determine its displaced volume, submerge the solid in water so
that it displaces water that is = to its own volume
specific gravity - ANS ✔✔is a ratio of the density of a substance to the density of water at the
same temperature
sp gr = density of sample
/ density of water
