Question 1

A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he concluded that "the pressure of a fixed amount of gas, measured at constant volume, is directly proportional to its absolute temperature." This statement is best described as a

Accepted Answer

A)   theory.
B)   hypothesis.
C)   law.
D)   experiment.
E)   definition.F) A) and C)
G) C) and D)

Question 2

Give an example of a physical property and a chemical property of each of the following:
A) oxygen gas
B) octane
C) copper

Accepted Answer

Answers could all be the same,...

Question 3

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Accepted Answer

A)   1.34 *10-13 m
B)   1.34 * 10-12 m
C)   1.34 * 10-10 m
D)   1.34 * 10-7 m
E)   1.34* 10-6 mF) A) and E)
G) A) and B)

Question 4

In an average year the American chemical industry produces more than 9.5 million metric tons of sodium carbonate. Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals. How many pounds of sodium carbonate are produced annually?

Accepted Answer

A)   2.1 * 1010 lb
B)   4.3 * 109 lb
C)   1.1 * 107 lb
D)   2.2 * 106 lb
E)   2.1 *104 lbF) B) and E)
G) None of the above

Question 5

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Accepted Answer

A)   38 cm
B)   24 cm
C)   18 cm
D)   9.3 cm
E)   5.9 cmF) C) and D)
G) B) and C)

Question 6

Which of the following is a chemical change?

Accepted Answer

A)   boiling of water
B)   melting wax
C)   broiling a steak on a grill
D)   condensing water vapor into rainfall
E)   carving a piece of woodF) C) and E)
G) A) and B)

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 E)
G) A) and C)

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The S.I. unit of speed (velocity)  is

Accepted Answer

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

Question 10

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

Question 11

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 12

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 *0 10-37 cm
C)   4.8 * 10-38 cm
D)   2.2 * 10-19 cm
E)   None of these choices is correct.F) None of the above
G) A) and B)

Question 13

Which of the following correctly shows how to convert a density of 20.1 g cm-3 to units of kg m-3?

Accepted Answer

A)   -3 to units of kg m-3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   -3 to units of kg m-3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   -3 to units of kg m-3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   -3 to units of kg m-3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   -3 to units of kg m-3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and D)
G) B) and E)

Question 14

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 * 1016
B)   2.7 * 1014
C)   2.7 * 1012
D)   2.7 * 108
E)   2.7 *104F) B) and D)
G) B) and E)

Question 15

- 5.98 is properly written as:

Accepted Answer

A)   0.06
B)   0.056
C)   0.0565
D)   0.05646
E)   0.056462F) A) and E)
G) C) and D)

Question 16

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/in3
B)   491 lb/in3
C)   376 lb/in3
D)   0.491 lb/in3
E)   1.83 *10-3 lb/in3F) A) and B)
G) C) and D)

Question 17

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

Accepted Answer

A)   accuracy.
B)   precision.
C)   systematic error.
D)   determinate error.
E)   human error.F) A) and D)
G) B) and C)

Question 18

Which of the following correctly expresses 52,030.2 m in scientific notation?

Accepted Answer

A)   5.20302 * 104 m
B)   5.20302* 105 m
C)   5.203 * 104 m
D)   5.20 *104 m
E)   5.2 * 104 mF) C) and E)
G) D) and E)

Question 19

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)   96,000. mF) B) and E)
G) C) and D)

Question 20

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/cm3
B)   1.840 g/cm3
C)   1.729 g/cm3
D)   1.598 g/cm3
E)   0.543 g/cm3F) A) and D)
G) A) and B)

Exam 1: Keys to the Study of Chemistry

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct Answer
verified

Give an example of a physical property and a chemical property of each of the following: A) oxygen gas B) octane C) copper

Correct Answer
verified
Answers could all be the same,...
View Answer

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

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Correct Answer
verified

Which of the following is a chemical change?

Correct Answer
verified

Which of the following correctly shows how to convert a density of 20.1 g cm^-3 to units of kg m^-3?

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

Correct Answer
verified

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

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

- 5.98 is properly written as:

Correct Answer
verified

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct Answer
verified

Express 96,342 m using 2 significant figures.

Correct Answer
verified

The S.I. unit of speed (velocity) is

Correct Answer
verified

Which measurement is expressed to 4 significant figures?

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

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

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

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct AnswerverifiedShow Answer

Give an example of a physical property and a chemical property of each of the following: A) oxygen gas B) octane C) copper

Correct AnswerverifiedAnswers could all be the same,...View AnswerShow Answer

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

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedShow Answer

Which of the following correctly shows how to convert a density of 20.1 g cm-3 to units of kg m-3?

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

Correct AnswerverifiedShow Answer

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

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

- 5.98 is properly written as:

Correct AnswerverifiedShow Answer

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct AnswerverifiedShow Answer

Express 96,342 m using 2 significant figures.

Correct AnswerverifiedShow Answer

The S.I. unit of speed (velocity) is

Correct AnswerverifiedShow Answer

Which measurement is expressed to 4 significant figures?

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

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

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 AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Answers could all be the same,...
View Answer

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

Correct Answer
verified

Correct Answer
verified

Which of the following correctly shows how to convert a density of 20.1 g cm^-3 to units of kg m^-3?

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
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

Correct Answer
verified