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Exam 1
Exam 1
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Introduction to Measurement #chemistry
Flashcards
33 cards
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Practice quiz
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Questions
33
Answers
1
A brief statement that summarizes past observations and predicts future ones is called a
theory
hypothesis
law
experiment
2
What is the mass of Pb that has a density of 11.4 g/mL & displaces 20.1 mL of water?
1.76g
2.30× 10−2 g
11.4g
229 g
3
Convert 155 ft
2
to square centimeters.
2.23× 107 cm2
1.44× 105 cm2
4.72× 103 cm2
3.46× 103 cm2
4
Which of the following is NOT a base unit?
Meter
Ampere
Kilogram
Liter
5
The boiling point of a liquid was measured. The actual boiling point of the liquid is 28.7°C.
accurate and precise.
accurate but imprecise.
precise but inaccurate.
inaccurate and imprecise.
6
A cube has an edge length of 6.4 in. What is the volume of the cube in cm
3
?
16 cm3
4.3× 103 cm3
1.0× 102 cm3
6.7× 102 cm3
7
What volume of liquid is in the graduated cylinder?
73.70mL
74 mL
74.0 mL
73.7mL
8
Convert 1.500 km
3
to liters.
1.500× 1012 L
1.500× 106 L
1.500× 109 L
1.500L
9
Calculate the following with the correct number of significant figures.
2
1.4
1.36
2.2
10
Round 0.023060070 to five significant figures.
0.0230
0.00231
0.023060
0.02306
11
Which of the following is an example of a theory?
Solution A is a darker red color than solution B.
The grass is green.
Matter is composed of indivisible particles called atoms.
The temperature of the water is 45°C.
12
Express 3140 in scientific notation.
3.14 × 103
3.14 × 10−3
3.140 × 103
3.140 × 10−3
13
A cube of Al (density = 2.70 g/mL) has a mass of 17.2 g. What is the edge length of the cube?
3.59cm
2.58cm
1.85cm
6.34cm
14
What is the identity of a material that has a mass of 1.08 kg and displaces 50.5 cm
3
of water?
copper
gold
lead
platinum
15
What is the density of a solution that has a mass of 13.5 g and a volume of 15.8 mL?
0.854g/mL
4.69g/mL
0.213g/mL
1.17g/mL
16
The gas mileage of a compact car is 15 km/L. What is this in miles per gallon? 1 gal = 3.785 L
55mi/gal
42mi/gal
30.mi/gal
35mi/gal
17
How many significant figures are in the number 0.03040?
four
one
two
three
18
_______ is the agreement of a particular value with the true value.
Precision
Accuracy
Certainty
Systematic error
19
You mix the water from these three beakers into one container. What is the volume?
79 mL
78.8 mL
78.817 mL
78.82 mL
20
What volume of transferred solution should be reported?
22.00 mL
22 mL
20 mL
22.0 mL
21
Which one of the following scientists stated and studied the Law of Conservation of Mass?
Aristotle
Dalton
Proust
Lavoisier
22
Which of the following is not an example of a derived quantity?
Pressure
Density
Volume
Length
23
Which of the following has the largest density?
A material that has a mass of 10.0 g and a volume of 2.00 L
A material that sinks in ethanol but floats on water
None of the above
A material that has a mass of 5.00 g and volume of 10.0 cm3
24
Which of the following numbers has four significant figures?
0.7180
0.003
0.10251
0.508
25
Which of the following statements best describes the Law of Conservation of Mass?
Mass can be either created or saved in a chemical reaction.
All matter contains the same mass.
Mass is neither created or destroyed in a chemical reaction.
Matter can be converted to less massive things.
26
What is the metric prefix for the factor 10
−9
?
pico-
nano-
micro-
centi-
27
Determine the mass of 2.5 cups of water if the density of water is 1.0 g/cm
3
and 1 cup = 240 mL
2.4× 102g
2.5g
1.0× 10–2 g
6.0× 102g
28
Theories are validated by
laws
experiments
observations
models
29
Which of the following would NOT be considered matter?
Sugar
Gasoline
Water
Light
30
What are the fundamental SI units of length, mass, time, and temperature respectively?
m, g, s, K
km, kg, s, K
m, kg, s, °C
m, kg, s, K
31
How many ounces of Hg are in 1.0 m
3
Hg? D
Hg
= 13.55 g/cm
3
and 1 ounce = 28.35 g.
6.5 × 106 ounces
4.8 × 105 ounces
6.5 × 104 ounces
5.2 × 104 ounces
32
What volume of Ethylene glycol must be poured to give 21.1 g? Density = 1.114 g/mL
18.94 mL
18.9 mL
23.5 mL
0.0528 mL
33
Convert 5.853 kg to milligrams.
5.853 mg
5.853× 106 mg
5.853× 10−6 mg
5853 mg
