CP Chemistry
Chemistry Skills Worksheet 1.1
Scientific notation, significant figures, conversions
Name _________________________________
Date ____________ Class _____________
Express the following numbers in standard notation and then in scientific notation
Exponent notation
1. 645 x 105
Standard notation
Scientific notation
2. 92562 x 10-3
3. .33 x 107
4. .00422 x 104
5. .0055 x 10-4
Determine the number of significant digits in each of the following
1. .93
__________
6. 1.008
_________
11. 345, 288.00 __________
2. 340
__________
7. 10001
__________
12. 1,250,250
__________
3. 0.097
__________
8. 600
__________
13. 0.010012
__________
4. 39.5
__________
9. 1.95 x 103 __________
14. 11.4 x 10-8
__________
10. 541.005
15. 1
5. 0.00760
__________
__________
__________
Complete the indicated operation and provide the final answer with the correct number of significant digits
Problem
1. 2.698 x 33.20 x 1.5611
2. 8.032  0.591
3. (3.2 x 103) (4.21x 102)
4. 3 x 154
5. 3.00 x 154
6. 7.623 + 85.0 + 9.815
7. 230.72 + 0.00861
8. 10.96 - 5.5
9. 23.6 - 16.1218
10. 2.5 + 2.34 + 3.6543
Calculator answer
Answer rounded to the correct # sf
CP Chemistry
Properties and Changes Worksheet 1.2
Name: ________________________
Date: ___________ Class _______
Classify each of the materials below. In the center column, state whether the material is a pure substance or a mixture. If the
material is a pure substance, further classify it as either an element or compound in the right column. Similarly, if the material is a
mixture, further classify it as homogeneous or heterogeneous in the right column. Write the entire word in each space to earn full
credit.
Material
concrete
sugar + pure water
(C12H22O11 + H2O)
iron filings (Fe)
limestone (CaCO3)
orange juice (w/pulp)
Pacific Ocean
air inside a balloon
aluminum (Al)
magnesium (Mg)
acetylene (C2H2)
tap water in a glass
soil
pure water (H2O)
chromium (Cr)
Chex mix
salt + pure water
(NaCl + H2O)
benzene (C6H6)
muddy water
brass
(Cu mixed with Zn)
baking soda (NaHCO3)
Pure Substance
or Mixture
Element, Compound,
Homogeneous, Heterogeneous
CP Chemistry
Properties and Changes Worksheet 1.2
Recall that physical properties can be observed without producing new substances. Chemical properties describe how a substance
interacts with other substances to produce new substances. Extensive properties depend upon the amount of matter in the sample;
intensive properties do not.
Directions, Part 1: Classify each of the properties listed below as extensive or intensive. Then classify each property as physical or
chemical. Write the word out to earn full credit.
Extensive or Intensive
Property
Property
Physical or Chemical
Property
color
combustibility
hardness
density
mass
melting point
ductility
volume
reactivity with acid
odor
weight
malleability
tendency to corrode
Directions, Part 2: Some measurements or descriptions of properties are listed below. Write which property is being described in each
case. Select properties that are listed in the table from Part 1.
A.
15 dm3
A. ______________________
B.
can easily be hammered into sheets
B. ______________________
C.
2.8 g/cm3
C. ______________________
D.
burns when heated in the presence of O2
D. ______________________
E.
shiny metal forms a chalky white layer on its surface
E. ______________________
F.
can be scratched by a diamond
F. ______________________
G.
500oC
G. ______________________
H.
can easily be drawn into a wire
H. ______________________
I.
candle wax melting
I.
J.
water boiling at
100 oC
______________________
J. ______________________
Graduated Cylinder Worksheet
A graduated cylinder can have numerous scales.
1) Determine the value for the minor grids on the cylinder.
a) ______
b) _______
c) _______
d) _______
When reading a graduated cylinder you need to keep the graduated
cylinder on the desk and lower your eyes to the level of the meniscus
and you read where the bottom of the meniscus is. Be sure to include
one point of estimation in your reading.
2) Determine the volume of the liquids in the following cylinders:
a) _________
b) _________
c) _______ d) _________
3) Draw in the meniscus for the following readings:
a) 49.21 mL
b) 18.2 mL
c) 27.65 mL
d) 63.8 mL