NAME: ____________________________________KEY________________________DATE: ______________________ PERIOD:__________________
CP Chemistry Measurement Review
Mrs. Kaspriskie
METRIC SYSTEM
1. Rewrite the sliding scale for metric system measurements using metric prefixes.
Kilo
( Hecto)
(Deca)
UNIT
deci
centi
milli
\
2. Complete the following table:
Quantity
Volume
Definition
Space occupied by matter
Metric Units
L
(standard),
mL = cm3
Equipment
Beaker,
graduated
cylinder
Mass
Weight without gravity; amount of
matter in a sample
Kg
balance
Temperature The average kinetic energy of particles
in a sample
°C, K
thermometer
Length
Distance between 2 points
m, cm, mm
Meter stick
or metric
ruler
Time
how long something takes
Seconds (sec) stopwatch
Energy
The ability to do work
Joule,
Calorie
calorimeter
DIMENSIONAL ANALYSIS: Use dimensional analysis to convert the units below. Remember, you must show
your set up and cancellation to get credit. Use the conversion factors found in your notes when necessary.
1) Convert 39cm to feet (ans: 1.30 ft)
Given: 39cm
Find: ft
CF: 2.54cm = 1 in
1 ft = 12 in
Set up & solve:
39cm
1 in
1 ft
= 1.30ft
2.54 cm 12 in
2) There are 3.55 L of Diet Pepsi in a can. How many gallons is this? (ans: 0.94 gal)
Given: 3.55 L
Find: gal
CF: 3.79 L = 1 gal
Set up & solve:
3.55L
1 gal
= 0.94 gal
3.79 L
3) Convert 50 joules to calories.(ans: 11.96 cal)
Given: 50J
Find: cal
CF: 1 cal = 4.18 J
Set up & solve:
50 J
1 cal
= 11.96 cal
4.18 J
4) Convert 25.0 gallons to mL (ans: 94,800 mL)
Given: 25.0 gal
Find: mL
CF: 3.79 L = 1 gallon
1 L = 1000 mL
Set up & solve:
25.0 gal
2.79 L 1000 mL
= 94, 000 mL
1 gal 1 L
5) Convert 525mL to cups. (ans: 2.22 cups)
Given: 525mL
Find: cups
CF: 237 mL = 1 cup
Set up & solve:
525mL
1 cup
237 mL
OR
525 mL
1L
1 gal
16 cups
1000mL
3.79L
1 gal
6) A new born baby weighs 3.180 kg. How many ounces does he weigh? (ans: 112.07 ounces)
Given: 3.180 kg
Find: oz
CF: 16 ounces = 1 pound
454g = 1 pound
1kg = 1000g
Set up & solve:
3.180 kg
1000 g
1kg
1 pound
16 oz
=112.07
454 g
1 pound
7) 876 milliliters to liters (ans: 0.876 L)
Given: 876mL
Find: L
CF: 1L = 1000 mL
Set up & solve:
876 mL
1L
= 0.876L
1000mL
8) 0.0009 kiloliters to liters (ans: 0.90 L)
Given: 0.0009kL
Find: L
CF: 1 kL = 1000L
Set up & solve:
0.0009 kL
1000 L
= 0.90 L
1 kL
9) 0.9 centigrams to kilograms (ans: 9x10-6 kg)
Given: 0.9cg
Find: kg
CF: 1kg = 100,000cg
Set up & solve:
0.9 cg
1 kg
100, 000 cg
= 9 x 10-6 kg
DENSITY
1.
Sugar has a density of 1.59 g/mL. What mass of sugar would be needed to fill a 250 mL beaker?
Given: D= 1.59 g/mL
Set up & solve: D=m/v
v = 250 mL
m= D x v = 1.59 g/mL X 250 mL = 397.5 g
Find: mass
2.
Find the volume, in cm3, of 525g of Styrofoam if it has a density of 0.005g/cm3.
Given: m = 525g
Set up & solve: D=m/v
D = 0.0005 g/ cm3
v = m/D = (525 g)/( 0.0005g/cm3) = 1,050,000 cm3
Find: volume
3. A student measures out 2.0mL of ethyl alcohol. The then finds it’s mass to be 1.55g. Calculate the
density from his experiment.
Given: volume = 2.0 mL
Set up & solve: D=m/v = 1.55g/2.0mL = 0.775 g/mL
mass = 1.55 g
Find:Density
4. In another lab, a student tries to find the density of a nickel rod. She measures the length, width
and height of the rod as 3.0cm, 4.5cm and 5.0cm. She then finds the mass of the rod to be 607.50g.
Calculate the density from the experiment.
Given: L= 3.0cm
W= 4.5 cm
H = 5.0 cm
Mass = 607.5 g
Find: Density
Set up & solve: V= L X W X H
3.0cm X4.5 cm X 5.0 cm = 67.5 cm3
D= m/v = 607.5 g/ 67.5 cm3 = 9 cm3
5. A student tries to find the volume of a rubber stopper by water displacement. He fills the graduated
cylinder below to level A. He lowers the stopper into the graduated cylinder. The water rises to level B.
LEVEL A
LEVEL B
a. Read the volume at Level A and Level B. Then find the volume of the stopper.
LEVEL A: __23.5 mL____________
LEVEL B: _____27.5 mL______________
VOLUME OF STOPPER: ____4.0 mL___________
b.
The mass of the stopper is 19.2g. Find the density of the stopper.
D= m/v = 19.2 g/ 4.0 mL = 4.8 g/mL
8. Density is a quantitative measurement. The object is heavy is a qualitative measurement. What is the
difference between quantitative and qualitative measurements? A qualitative measurement describes a
characteristic (ex. The texture is smooth.). A quantitative measurement, like density, has a number
(quantity) and units.
READING EQUIPMENT
1) Measure the amount of liquid in each graduated cylinder below, using the bottom of the meniscus.
2) Record the measurement on the line below each graduated cylinder, making sure include the estimate and units in
all of your measurements (reminder: units is mL)
15.1 mL
553 mL
5.71 mL
0.40 mL
9.3 mL
57 mL
660 mL
3800 mL
3) Each diagram below represents a piece of lab equipment used to measure liquid volume. Use the student’s
measurement to fill in the calibration boxes.
Student’s measurement = 3.7mL
Equipment Read To:__tenths___
Equipment Calibrated to: ones___
# of significant digits: ___2____
a. ____4__ml___
b. ____3__ml___
Student’s measurement = 240mL
Equipment Read To: __ones__
Equipment Calibrated to: _tens__
# of significant digits: __3__
a. __300__ml_____
b. _200_ml__
PHYSICAL VS. CHEMICAL
Fill in the Blanks
Physical properties can be observed without chemically changing matter.
Chemical properties describe how a substance interacts with other substances.
Label each property below as physical (PP) or chemical (CP):
__P___ 1. moth balls vaporize in the closet
__P___ 6. Butter melts at 30°C
__C___ 2. Hydrofluoric acid attacks glass
__P___ 7. Sugar dissolves in water
__P___ 3. Chlorine gas liquefies at -35°C
__P___ 8. Paint dissolves in acetone
__C___ 4. Hydrogen gas burns in chlorine gas
__C___ 9. Baking soda fizzes with acid
__P___ 5. Hydrogen gas pours “up” because it is lighter than air
Determine whether each change below is physical (PC) or chemical (CC).
__P___ 1. Perfume evaporating on your skin
_C____ 5. Wood rotting
__C___ 2. Autumn leaves changing color
__P___ 6. Melting copper metal
__C___ 3. Burning sugar
__C___7. Baking a cake
__P___ 4. Fogging a mirror with your breath
__P___ 8. Slicing potatoes for fries