Question 1

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.F) C) and D)
G) A) and B)

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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 cm3F) B) and C)
G) All of the above

Question 4

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 propertyF) A) and B)
G) None of the above

Question 5

The number 1.050 × 109 has how many significant figures?

Accepted Answer

A)   2
B)   3
C)   4
D)   9
E)   13F) B) and C)
G) A) and B)

Question 6

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 inF) B) and C)
G) A) and C)

Question 7

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

Accepted Answer

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

Question 8

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 KF) A) and B)
G) A) and C)

Question 9

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 kmF) A) and E)
G) A) and C)

Question 10

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)   5F) B) and D)
G) A) and B)

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A)   Law
B)   Hypothesis
C)   Theory
D)   Phenomena
E)   PredictionF) C) and D)
G) A) and D)

Question 13

Matter is anything that has mass and occupies space.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A)   Law
B)   Hypothesis
C)   Theory
D)   Phenomena
E)   PredictionF) B) and E)
G) All of the above

Question 15

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/in3F) D) and E)
G) C) and D)

Question 16

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°CF) A) and C)
G) A) and E)

Question 17

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 kmF) A) and E)
G) C) and D)

Question 18

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 HzF) A) and B)
G) All of the above

Question 19

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.E) A) and C)
F) B) and D)

Question 20

How many significant figures are in 0.006570?

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7F) B) and D)
G) C) and D)

Exam 1: Chemistry: the Central Science

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Express 122.0°F in °C.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The number 1.050 × 109 has how many significant figures?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

Matter is anything that has mass and occupies space.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How many hertz is 600.11 MHz?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

How many significant figures are in 0.006570?

Correct AnswerverifiedShow Answer

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The number 1.050 × 10⁹ has how many significant figures?

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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)

Correct Answer
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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)

Correct Answer
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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?

Correct Answer
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Correct Answer
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