B Chemistry 1-2 Unit 1 Review
Practice Test
1.
In July of 2002 the temperature in Phoenix Arizona reached 113 oF. What is the equivalent temperature on the
Celsius scale?
A. 45 oC
B. 54 oC
C. 62 oC
D. 386 oC
E. None of the above
2.
When plotting numerical data on a graph which of the following is true?
A. The independent variable is always placed on the x axis
B. The dependent variable is always placed on the y axis
C. The independent variable is always placed on the y axis
D. Both A and B are correct
3.
A state in which matter adopts the shape of the container, but whose volume is minimally affected by pressure is
called a
A. Plasma
B. Solid
C. Liquid
D. Gas
4.
Which of the following diagrams represents a mixture? [Note: different circles represent different atoms].
A.
B
C.
D
5.
When the number 0.00000308 is written in scientific notation, it should appear as
A.
3.08 x 105
B.
3.08 x 10-5
C.
3.08 x 10-6
D.
None of the above
6.
Which of the following properties is a chemical property of the element, copper?
A. It melts at 1284 oC
B. Its density is 8.96 g/cm3
C. It is a good conductor of heat and electricity
D. It turns greenish when exposed to chlorine gas.
E. Its specific heat is 0.385 J/g oC
7.
A certain liquid has a density of 0.75 g cm-3. It has a volume of 40 cm3. What is the mass of the
liquid?
D=m/V
A. 53.3 g
B. 30 g
C. 19 g
D. .019 g
8.
Which one of the following is an element?
A.
caffeine
B.
silver
C.
air
D.
carbon dioxide
10. A homogeneous substance can be separated by all of the following methods except
A.
Distillation
B.
Chromatography
C.
Crystallization
D.
Filtration
11.
A compound differs from a mixture in all of the following except
A compound is always homogeneous while a mixture is always heterogeneous
The components of a compound are always chemically combined, while those of a mixture are
physically combined
C.
The components of a mixture have quite different properties from each other after they are separated
D.
The ratio of the elements in a compound is fixed while the ratios of the components of a mixture can
vary.
A.
B.
12.
13.
Vocabulary: Distinguish and explain the difference between the following

Accuracy and precision

Systematic and random error

Physical and chemical changes

Elements, compounds, and mixtures

Atoms and molecules

Homogeneous and heterogeneous
The density of aluminum is 2.70 g cm-3. Calculate the volume of 48 grams of aluminum.
14. The density of ethanol is 0.792 g cm-3. Calculate the mass of 500 cm3 of ethanol.