Chem 101 - General Chemistry I » Spring 2021 » Chapter 1 Homework Quiz

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Question #1
The statement “The total mass of materials is not affected by a chemical change in the materials” is called a(n) _____.
A.   observation
B.   measurement
C.   theory
D.   experiment
E.   natural law
Question #2
Something done to test a hypothesis that produces new observations is called a(n)
A.   experiment
B.   theory
C.   observation
D.   measurement
E.   natural law
Question #3
Which does not exist as diatomic gas?
A.   bromine
B.   chlorine
C.   nitrogen
D.   oxygen
Question #4
Which of the following represents an element?
A.   CO
B.   OS
C.   NI
D.   N2
Question #5
Which of these is an element?
A.   iron ore
B.   wood
C.   silver
D.   water
E.   brass
Question #6
Which of the following is a mixture?
A.   mud
B.   sugar
C.   water
D.   neon
Question #7
Which of the following is a “pure” substance?
A.   De-ionized water
B.   sea water
C.   trail mix
D.   tap water
Question #8
All solutions are homogeneous mixtures
A.   TRUE
B.   FALSE
Question #9
Which of the following is a homogeneous mixture?
A.   Gasoline
B.   Sodium chloride
C.   Pure water
D.   Copper metal
E.   Soil
Question #10
What makes physical properties different from chemical properties?
A.   Physical properties describe elements in the solid state rather than in the liquid or gas state.
B.   At most one of the adults has high blood pressure.
C.   Physical properties relate to elements rather than compounds.
D.   Physical properties appear only after a chemical change occurs.
E.   Physical properties can be observed without attempting to change the identity of the substance.
Question #11
Which of the following is not a physical change?
A.   dissolving sugar in water
B.   a burning candle
C.   crushing of stone
D.   melting of zinc
Question #12
The prefixes nano and mega correspond to which of the following pair, respectively?
A.   10–9 and 106
B.   109 and 106
C.   10–9 and 109
D.   106 and 10-9
Question #13
2.7 kilograms contain this many grams.
A.   2.7 × 101
B.   2.7 × 10–3
C.   2.7 × 102
D.   2.7 × 10–2
E.   2.7 × 103
Question #14
Convert: 8.21 × 102 g = ____________ kg.
A.   0.0821 kg
B.   8.21 × 104 kg
C.   0.821 kg
D.   8.21 × 105 kg
E.   8.21 kg
Question #15
Two substances A and B occupy the same volume. The mass of substance A is half that of substance B. Therefore, the density of substance A is lower than the density of substance B.
A.   FALSE
B.   TRUE
Question #16
How many significant figures are in the number 14.04?
A.   1
B.   3
C.   2
D.   4
Question #17
How many significant figures are in the number 0.0040090?
A.   4
B.   5
C.   7
D.   6
E.   8
Question #18
What is the result of the following multiplication expressed in scientific notation to the correct number of significant figures? (5.45 x 103)(6.0 x 10-3)
A.   3.27 x 101
B.   3.27 x 10-1
C.   3.3 x 101
D.   3 x 101
E.   3.2 x 10-1
Question #19
Add 114.32 + 12.1 + 13. The sum expressed to the proper number of significant figures is ___.
A.   139
B.   140
C.   139.42
D.   139.4
Question #20
How many significant figures should be included in the answer to the following calculation? (3.48) (3.6) / 2.470
A.   1
B.   2
C.   4
D.   3
Question #21
A walker travels a distance of 1.4 miles. How many inches did the walker travel? (1 mi = 5280. ft) (1 ft = 12 in)
A.   8.6 in
B.   17. in
C.   8.9 × 104 in
D.   6.2 × 102 in
E.   7.4 × 103 in
Question #22
An iron sample has a mass of 2.71 lb. What is the mass of this sample in grams?
A.   1.23 × 103 g
B.   5.97 g
C.   5.97 × 103 g
D.   2.71 × 103 g
Question #23
Convert 409.3 qt to milliliters (1 L = 1.060 qt).
A.   386.1 mL
B.   3.861 × 105 mL
C.   4.339 × 105 mL
D.   none of these
Question #24
Baking soda and vinegar are mixed in a balloon. A gas is produced, and the balloon expands to a volume of 4.70 L. What is the volume of the balloon in cm3?
A.   0.470 cm3
B.   4.70 × 102 cm3
C.   4.70 × 103 cm3
D.   47.0 cm3

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