Question 1

Select the best statement about chemistry before 1800.

Accepted Answer

A)  Alchemy focused on objective experimentation rather than mystical explanations of processes.
B)  The phlogiston theory laid a valuable theoretical basis for modern chemistry.
C)  Lavoisier's quantitative work on the role of oxygen in combustion was the beginning of modern chemistry.
D)  The interpretation of data by alchemists was not biased by their overall view of life.
E)  Alchemists failed because they did not develop any practical chemical methods.F) A) and B)
G) A) and C)

Question 2

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the temperature of the measurement.)

Accepted Answer

A)  1.992 g/cm 3
B)  1.840 g/cm 3
C)  1.729 g/cm 3
D)  1.598 g/cm 3
E)  0.543 g/cm 3F) None of the above
G) C) and E)

Question 3

During the swing of a frictionless pendulum, what energy form(s)  remain constant?

Accepted Answer

A)  Kinetic energy only
B)  Potential energy only
C)  Both kinetic energy and potential energy
D)  Kinetic plus potential energy
E)  None of these choices are correct.F) C) and D)
G) A) and C)

Question 4

The joule is the SI unit of energy and is equal to 1 kg m2 s−2. The erg is another energy unit, equal to 1 g cm2 s−2. Use unit conversion methods to work out how many ergs are in 1 joule.

Accepted Answer

A)  10 −1 ergs
B)  10 ergs
C)  10 2 ergs
D)  10 5 ergs
E)  10 7 ergsF) B) and C)
G) B) and E)

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?

Accepted Answer

A)  849 lb/in 3
B)  491 lb/in 3
C)  376 lb/in 3
D)  0.491 lb/in 3
E)  1.83 × 10 − 3 lb/in 3F) C) and E)
G) B) and C)

Question 6

The symbol for the SI base unit of mass is

Accepted Answer

A)  mg.
B)  g.
C)  kg.
D)  metric ton.
E)  lb.F) A) and B)
G) A) and C)

Question 7

Which measurement is expressed to 4 significant figures?

Accepted Answer

A)  0.423 kg
B)  24.049 cm
C)  1300 K
D)  82,306 m
E)  62.40 gF) A) and B)
G) A) and C)

Question 8

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Accepted Answer

A)  5.5 × 10 8 kg
B)  5.5 × 10 5 kg
C)  5.5 × 10 −4 kg
D)  5.5 × 10 −6 kg
E)  5.5 × 10 −1 kgF) B) and C)
G) A) and B)

Question 9

The ripening of fruit, once picked, is an example of physical change.

Accepted Answer

A) True 
 B)False

Question 10

If the density of a certain spherical atomic nucleus is 1.0 × 1014 g cm−3 and its mass is 2.0 × 10−23 g, what is its radius in cm?

Accepted Answer

A)  3.6 × 10 −13 cm
B)  2.0 × 10 −37 cm
C)  4.8 × 10 −38 cm
D)  2.2 × 10 −19 cm
E)  None of these choices are correct.F) A) and B)
G) B) and E)

Question 11

A detailed explanation of natural phenomena that is generally accepted and has been extensively tested is called a

Accepted Answer

A)  theory.
B)  hypothesis.
C)  law.
D)  fact.
E)  postulate.F) B) and E)
G) A) and E)

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

A detailed explanation of natural phenomena that is generally accepted and has been extensively tested is called a

Correct Answer
verified

The symbol for the SI base unit of mass is

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

The ripening of fruit, once picked, is an example of physical change.

Correct Answer
verified

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Correct Answer
verified

If the density of a certain spherical atomic nucleus is 1.0 × 10¹⁴ g cm⁻³ and its mass is 2.0 × 10⁻²³ g, what is its radius in cm?

Correct Answer
verified

Which measurement is expressed to 4 significant figures?

Correct Answer
verified

Select the best statement about chemistry before 1800.

Correct Answer
verified

During the swing of a frictionless pendulum, what energy form(s) remain constant?

Correct Answer
verified

The joule is the SI unit of energy and is equal to 1 kg m² s⁻². The erg is another energy unit, equal to 1 g cm² s⁻². Use unit conversion methods to work out how many ergs are in 1 joule.

Correct Answer
verified

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

A detailed explanation of natural phenomena that is generally accepted and has been extensively tested is called a

Correct AnswerverifiedShow Answer

The symbol for the SI base unit of mass is

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

The ripening of fruit, once picked, is an example of physical change.

Correct AnswerverifiedShow Answer

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Correct AnswerverifiedShow Answer

If the density of a certain spherical atomic nucleus is 1.0 × 1014 g cm−3 and its mass is 2.0 × 10−23 g, what is its radius in cm?

Correct AnswerverifiedShow Answer

Which measurement is expressed to 4 significant figures?

Correct AnswerverifiedShow Answer

Select the best statement about chemistry before 1800.

Correct AnswerverifiedShow Answer

During the swing of a frictionless pendulum, what energy form(s) remain constant?

Correct AnswerverifiedShow Answer

The joule is the SI unit of energy and is equal to 1 kg m2 s−2. The erg is another energy unit, equal to 1 g cm2 s−2. Use unit conversion methods to work out how many ergs are in 1 joule.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

If the density of a certain spherical atomic nucleus is 1.0 × 10¹⁴ g cm⁻³ and its mass is 2.0 × 10⁻²³ g, what is its radius in cm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The joule is the SI unit of energy and is equal to 1 kg m² s⁻². The erg is another energy unit, equal to 1 g cm² s⁻². Use unit conversion methods to work out how many ergs are in 1 joule.

Correct Answer
verified