Question 1

The rusting of a piece of iron under environmental conditions is a physical change.

Accepted Answer

A) True 
 B)False

Question 2

Express 122.0°F in °C.

Accepted Answer

A)  50.0°C 
B)  64.4°C 
C)  67.8°C 
D)  162.0°C 
E)  219.6°C 
A)  50.0°C 
B)  64.4°C 
C)  67.8°C 
D)  162.0°C 
E)  219.6°C

Question 3

The density of magnesium is 1.7 g/cm3, and the density of iron is 7.9 g/cm3. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?

Accepted Answer

A)  1.8 x 102 g 
B)  61 g 
C)  2.8 x 103 g 
D)  3.8 x 103 g 
E)  None of these choices. 
A)  1.8 x 102 g 
B)  61 g 
C)  2.8 x 103 g 
D)  3.8 x 103 g 
E)  None of these choices.

Question 4

A(n) ________ is something that has a definite composition.

Accepted Answer

The answer of A(n) ________ is something that has a...

Question 5

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm3. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g)

Accepted Answer

A)  849 lb/in3 
B)  491 lb/in3 
C)  376 lb/in3  
D)  0.491 lb/in3 
E)  1.83 × 10-3 lb/in3 
A)  849 lb/in3 
B)  491 lb/in3 
C)  376 lb/in3  
D)  0.491 lb/in3 
E)  1.83 × 10-3 lb/in3

Question 6

Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many kilometers will a radio message to outer space travel in exactly one year? (365.24 days = 1 y)

Accepted Answer

A)  9.46 × 1015 km 
B)  7.30 × 108 km 
C)  7.10 × 1010 km 
D)  9.47 × 1012 km 
E)  3.33 × 10- 3 km 
A)  9.46 × 1015 km 
B)  7.30 × 108 km 
C)  7.10 × 1010 km 
D)  9.47 × 1012 km 
E)  3.33 × 10- 3 km

Question 7

After carrying out the operation (13.7 + 0.027) ÷ 8.221, how many significant figures are appropriate to show in the result?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 8

A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Accepted Answer

A)  58 cm3 
B)  1.7 x 105 cm3 
C)  90 cm3  
D)  3.4 cm3 
E)  34 cm3 
A)  58 cm3 
B)  1.7 x 105 cm3 
C)  90 cm3  
D)  3.4 cm3 
E)  34 cm3

Question 9

Matter is anything that has mass and occupies space.

Accepted Answer

A) True 
 B)False

Question 10

How many hertz is 600.11 MHz?

Accepted Answer

A)  6.0011 × 10-4 Hz 
B)  60.011 Hz 
C)  6.0011 × 106 Hz 
D)  6.0011 × 10-2 Hz 
E)  6.0011 × 108 Hz 
A)  6.0011 × 10-4 Hz 
B)  60.011 Hz 
C)  6.0011 × 106 Hz 
D)  6.0011 × 10-2 Hz 
E)  6.0011 × 108 Hz

Question 11

Which of the following is a tentative explanation for a set of observations?

Accepted Answer

A)  Law 
B)  Hypothesis 
C)  Theory 
D)  Phenomena 
E)  Prediction 
A)  Law 
B)  Hypothesis 
C)  Theory 
D)  Phenomena 
E)  Prediction

Question 12

How many inches are in 382.5 cm? (1 in = 2.54 cm)

Accepted Answer

A)  150.6 in 
B)  6.641 × 10-3 in 
C)  151 in 
D)  971.6 in 
E)  972 in 
A)  150.6 in 
B)  6.641 × 10-3 in 
C)  151 in 
D)  971.6 in 
E)  972 in

Question 13

How many significant figures are in 0.006570?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  7 
A)  3 
B)  4 
C)  5 
D)  6 
E)  7

Question 14

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

Accepted Answer

A)  387.6 K 
B)  355.6 K 
C)  323.6 K 
D)  190.8 K 
E)  -190.8 K 
A)  387.6 K 
B)  355.6 K 
C)  323.6 K 
D)  190.8 K 
E)  -190.8 K

Question 15

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers. (1 mi = 1609 m)

Accepted Answer

A)  6.1 × 105 km 
B)  5.3 × 105 km 
C)  3.9 × 105 km 
D)  1.5 × 105 km 
E)  9.4 × 104 km 
A)  6.1 × 105 km 
B)  5.3 × 105 km 
C)  3.9 × 105 km 
D)  1.5 × 105 km 
E)  9.4 × 104 km

Question 16

When the value of something does not depend on the amount of the matter then what is this called?

Accepted Answer

A)  Empirical property 
B)  Intensive property 
C)  Inclusive property 
D)  Extensive property 
E)  Exclusive property 
A)  Empirical property 
B)  Intensive property 
C)  Inclusive property 
D)  Extensive property 
E)  Exclusive property

Question 17

What is a unifying principle that explains a body of experimental observations?

Accepted Answer

A)  Law 
B)  Hypothesis 
C)  Theory 
D)  Phenomena 
E)  Prediction 
A)  Law 
B)  Hypothesis 
C)  Theory 
D)  Phenomena 
E)  Prediction

Question 18

A laboratory technician analyzed a sample three times for percent iron and got the following results: 22.43% Fe, 24.98% Fe, and 21.02% Fe. The actual percent iron in the sample was 22.81%. The analyst's

Accepted Answer

A)  precision was poor but the average result was accurate. 
B)  accuracy was poor but the precision was good. 
C)  work was only qualitative. 
D)  work was precise. 
A)  precision was poor but the average result was accurate. 
B)  accuracy was poor but the precision was good. 
C)  work was only qualitative. 
D)  work was precise.

Question 19

The number 1.050 × 109 has how many significant figures?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  9 
E)  13 
A)  2 
B)  3 
C)  4 
D)  9 
E)  13

Question 20

A particular temperature in degrees Celsius is larger than the temperature in kelvins.

Accepted Answer

A) True 
 B)False

Exam 1: Chemistry: the Central Science

The rusting of a piece of iron under environmental conditions is a physical change.

Express 122.0°F in °C.

The density of magnesium is 1.7 g/cm3, and the density of iron is 7.9 g/cm3. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?

A(n) ________ is something that has a definite composition.

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm3. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g)

Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many kilometers will a radio message to outer space travel in exactly one year? (365.24 days = 1 y)

After carrying out the operation (13.7 + 0.027) ÷ 8.221, how many significant figures are appropriate to show in the result?

A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Matter is anything that has mass and occupies space.

How many hertz is 600.11 MHz?

Which of the following is a tentative explanation for a set of observations?

How many inches are in 382.5 cm? (1 in = 2.54 cm)

How many significant figures are in 0.006570?

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers. (1 mi = 1609 m)

When the value of something does not depend on the amount of the matter then what is this called?

What is a unifying principle that explains a body of experimental observations?

A laboratory technician analyzed a sample three times for percent iron and got the following results: 22.43% Fe, 24.98% Fe, and 21.02% Fe. The actual percent iron in the sample was 22.81%. The analyst's

The number 1.050 × 109 has how many significant figures?

A particular temperature in degrees Celsius is larger than the temperature in kelvins.

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

The density of magnesium is 1.7 g/cm³, and the density of iron is 7.9 g/cm³. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm³. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g)

Radio waves travel at the speed of light, which is 3.00 × 10⁸ m/s. How many kilometers will a radio message to outer space travel in exactly one year? (365.24 days = 1 y)

The number 1.050 × 10⁹ has how many significant figures?