Question 1

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Accepted Answer

A)  65,500 mi/h
B)  25,300 mi/h
C)  18,200 mi/h
D)  1,090 mi/h
E)  5.02 × 10−3 mi/hF) A) and D)
G) None of the above

Question 2

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Accepted Answer

A) True 
 B)False

Question 3

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Accepted Answer

A)  £1310
B)  £3510
C)  £6370
D)  £10400
E)  £17100F) A) and E)
G) D) and E)

Question 4

Which of the following correctly expresses 0.000007913 g in scientific notation?

Accepted Answer

A)  7.913 × 10 6 g
B)  7.913 × 10 5 g
C)  7.913 × 10 −5 g
D)  7.913 × 10 −6 g
E)  7.913 × 10 −9 gF) A) and B)
G) B) and E) D

Question 5

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Accepted Answer

A) True 
 B)False

Question 6

The potential energy of a car moving on a level road does not depend on its speed.

Accepted Answer

A) True 
 B)False

Question 7

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Accepted Answer

A) True 
 B)False

Question 8

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Accepted Answer

A)  13.3568
B)  13.357
C)  13.36
D)  13.4
E)  13F) None of the above
G) C) and D)

Question 9

The SI unit of speed (velocity)  is

Accepted Answer

A)  km/h.
B)  km/s.
C)  m/h.
D)  m/s.
E)  None of these choices are correct.F) B) and E)
G) D) and E)

Question 10

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

Question 11

The number 6.0448, rounded to 3 decimal places, becomes 6.045.

Accepted Answer

A) True 
 B)False

Question 12

When applying the scientific method, it is important to avoid any form of hypothesis.

Accepted Answer

A) True 
 B)False

Question 13

As part of an experiment to determine the density of a new plastic developed in her laboratory, Sara Ann Dippity measures the volume of a solid sample. Her four trials yield volumes of 12.37 cm3, 12.41 cm3, 12.39 cm3, and 12.38 cm3. Measurements of other scientists in the lab give an average volume of 12.49 cm3. Which of the following statements represents the best analysis of the data?

Accepted Answer

A)  Sara's results have low precision and high accuracy.
B)  Sara's results have high precision and high accuracy.
C)  Sara's results have greater precision than accuracy.
D)  Sara's results have greater accuracy than precision.
E)  Sara has been using a faulty instrument to measure the volume.F) A) and B)
G) A) and C)

Question 14

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in Fahrenheit.

Accepted Answer

A) True 
 B)False  False

Question 15

The most significant contribution to modern science made by alchemists was

Accepted Answer

A)  their fundamental work in the transmutation of the elements.
B)  their widespread acceptance of observation and experimentation.
C)  their systematic method of naming substances.
D)  their understanding of the nature of chemical reactions.
E)  their discovery of phlogiston.F) B) and D)
G) C) and E)

Question 16

The SI prefix mega- (M)  means

Accepted Answer

A)  10 −6.
B)  10 −3.
C)  10 3.
D)  10 6.
E)  10 9.F) C) and D)
G) A) and C)

Question 17

The area of a 15-inch pizza is 176.7 in2. Express this area in square centimeters.

Accepted Answer

A)  1140. cm 2
B)  448.8 cm 2
C)  96.8 cm 2
D)  69.57 cm 2
E)  27.39 cm 2F) A) and C)
G) A) and B) A

Question 18

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Accepted Answer

A)  382.0°C
B)  167.7°C
C)  153.4°C
D)  117.9°C
E)  103.7°CF) A) and B)
G) C) and D)

Question 19

At a pressure of one billionth (10−9)  of atmospheric pressure, there are about 2.7 × 1010 molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Accepted Answer

A)  2.7 × 10 16
B)  2.7 × 10 14
C)  2.7 × 10 12
D)  2.7 × 10 8
E)  2.7 × 10 4F) B) and D)
G) C) and D)

Question 20

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm3) . What is the density of talc?

Accepted Answer

A)  4.61 g/cm 3
B)  2.82 g/cm 3
C)  2.63 g/cm 3
D)  2.44 g/cm 3
E)  1.61 g/cm 3F) None of the above
G) A) and E)

Exam 1: Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Correct Answer
verified

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Correct Answer
verified

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct Answer
verified

Which of the following correctly expresses 0.000007913 g in scientific notation?

Correct Answer
verified
D

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Correct Answer
verified

The potential energy of a car moving on a level road does not depend on its speed.

Correct Answer
verified

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct Answer
verified

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct Answer
verified

The SI unit of speed (velocity) is

Correct Answer
verified

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

Correct Answer
verified

The number 6.0448, rounded to 3 decimal places, becomes 6.045.

Correct Answer
verified

When applying the scientific method, it is important to avoid any form of hypothesis.

Correct Answer
verified

Correct Answer
verified

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in Fahrenheit.

Correct Answer
verified
False

The most significant contribution to modern science made by alchemists was

Correct Answer
verified

The SI prefix mega- (M) means

Correct Answer
verified

The area of a 15-inch pizza is 176.7 in². Express this area in square centimeters.

Correct Answer
verified
A

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct Answer
verified

At a pressure of one billionth (10⁻⁹) of atmospheric pressure, there are about 2.7 × 10¹⁰ molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct Answer
verified

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm³) . What is the density of talc?

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Correct AnswerverifiedShow Answer

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Correct AnswerverifiedShow Answer

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct AnswerverifiedShow Answer

Which of the following correctly expresses 0.000007913 g in scientific notation?

Correct AnswerverifiedD

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Correct AnswerverifiedShow Answer

The potential energy of a car moving on a level road does not depend on its speed.

Correct AnswerverifiedShow Answer

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct AnswerverifiedShow Answer

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct AnswerverifiedShow Answer

The SI unit of speed (velocity) is

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 number 6.0448, rounded to 3 decimal places, becomes 6.045.

Correct AnswerverifiedShow Answer

When applying the scientific method, it is important to avoid any form of hypothesis.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in Fahrenheit.

Correct AnswerverifiedFalse

The most significant contribution to modern science made by alchemists was

Correct AnswerverifiedShow Answer

The SI prefix mega- (M) means

Correct AnswerverifiedShow Answer

The area of a 15-inch pizza is 176.7 in2. Express this area in square centimeters.

Correct AnswerverifiedA

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct AnswerverifiedShow Answer

At a pressure of one billionth (10−9) of atmospheric pressure, there are about 2.7 × 1010 molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct AnswerverifiedShow Answer

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm3) . What is the density of talc?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified
D

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

The area of a 15-inch pizza is 176.7 in². Express this area in square centimeters.

Correct Answer
verified
A

Correct Answer
verified

At a pressure of one billionth (10⁻⁹) of atmospheric pressure, there are about 2.7 × 10¹⁰ molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct Answer
verified

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm³) . What is the density of talc?

Correct Answer
verified