Question 1

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Accepted Answer

A)   159°F
B)   133°F
C)   101°F
D)   69.0°F
E)   43.4°FF) B) and C)
G) A) and E)

Question 2

Which of the following is a physical change?

Accepted Answer

A)   milk turning sour
B)   battery cables corroding
C)   sugar turning brown when heated
D)   liquid water being cooled and forming ice
E)   an egg being hard-boiledF) A) and C)
G) All of the above

Question 3

Express 96,342 m using 2 significant figures.

Accepted Answer

A)   9.60 × 104 m
B)   9.6 × 104 m
C)   9.60 × 10-4 m
D)   9.6 × 10-4 m
E)   96000. mF) B) and C)
G) B) and E)

Question 4

Which of the following is an extensive property of oxygen?

Accepted Answer

A)   boiling point
B)   temperature
C)   average kinetic energy of molecules
D)   density
E)   massF) A) and D)
G) A) and E)

Question 5

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 E)

Question 6

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

Accepted Answer

A)   7.913 × 106 g
B)   7.913 × 105 g
C)   7.913 × 10-5 g
D)   7.913 × 10-6 g
E)   7.913 × 10-9 gF) A) and C)
G) D) and E)

Question 7

In each of the sets below, choose the one quantity or number which is exact.
A) i. the human population
ii. the distance in light years from the sun to Alpha Centauri, a nearby star
iii. the winning time for the 100 m dash in the Olympic Games
B) i. the weight of a particular one cent coin in g
ii. the boiling point of lead, in °C
iii. the number of cm in 1 yd 
C) i. the measured value of the speed of light (2.998 × 108 m/s)
ii. π (3.141)
iii. the volume of milk in a 1-gallon jug

Accepted Answer

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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 D)
G) A) and C)

Question 10

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

Accepted Answer

A)   5.5 × 108 kg
B)   5.5 × 105 kg
C)   5.5 × 10-4 kg
D)   5.5 × 10-6 kg
E)   5.5 × 10-1 kgF) C) and D)
G) A) 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) A) and E)
G) A) and D)

Exam 1: Keys to Studying Chemistry Definitions, Units, and Problem Solving

Correct Answer
verified

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Correct Answer
verified

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

Correct Answer
verified

Express 96,342 m using 2 significant figures.

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

Which of the following is an extensive property of oxygen?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is a physical change?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Exam 1: Keys to Studying Chemistry Definitions, Units, and Problem Solving

Correct AnswerverifiedShow Answer

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Express 96,342 m using 2 significant figures.

Correct AnswerverifiedShow Answer

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 of the following is an extensive property of oxygen?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a physical change?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
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