Question 1

Convert 38 ° F to the Celsius scale.

Accepted Answer

A)  3.3 ° C 
B)  8.2 ° C 
C)  - 40 ° C 
D)  4.5 ° C 
E)  311 ° C 
A)  3.3 ° C 
B)  8.2 ° C 
C)  - 40 ° C 
D)  4.5 ° C 
E)  311 ° C

Question 2

Which of the following is correctly classified as a hypothesis?

Accepted Answer

A)  "The sun will rise in the East today." 
B)  "Global warming is a result of the increased carbon dioxide concentration in the atmosphere." 
C)  "Our team is better than theirs." 
D)  "Cookies will turn brown when baked." 
E)  "My book is better than yours." 
A)  "The sun will rise in the East today." 
B)  "Global warming is a result of the increased carbon dioxide concentration in the atmosphere." 
C)  "Our team is better than theirs." 
D)  "Cookies will turn brown when baked." 
E)  "My book is better than yours."

Question 3

What length in millimeters can be reported for the rectangle below?
(Note that the ruler measures in centimeters.)

Accepted Answer

A)  24 mm 
B)  24.0 mm 
C)  2.4 mm 
D)  2.40 mm 
E)  240 mm 
A)  24 mm 
B)  24.0 mm 
C)  2.4 mm 
D)  2.40 mm 
E)  240 mm

Question 4

A person weighs 83.2 kg. What is this person's weight in pounds?
(1)00 pound = 454 grams)

Accepted Answer

A)  0.183 pounds 
B)  5.46 pounds 
C)  37.8 pounds 
D)  183 pounds 
E)  3.78×107 pounds 
A)  0.183 pounds 
B)  5.46 pounds 
C)  37.8 pounds 
D)  183 pounds 
E)  3.78×107 pounds

Question 5

What is the speed of an automobile given in miles per second (miles/sec) that is traveling 80. kilometer per hour (km/hour)?
(1 km = 0.621 miles; 1 hour = 60 min; 1 min = 60 sec)

Accepted Answer

A)  1.4×10 - 2 miles/s 
B)  3.6×10 - 2 miles/s 
C)  50 miles/s 
D)  1.3×102 miles/s 
E)  1.8×105 miles/s 
A)  1.4×10 - 2 miles/s 
B)  3.6×10 - 2 miles/s 
C)  50 miles/s 
D)  1.3×102 miles/s 
E)  1.8×105 miles/s

Question 6

Which of the following measurements is considered a combination of one of the seven base units from which all other measurements can be made?

Accepted Answer

A)  mass 
B)  volume 
C)  amount 
D)  temperature 
E)  time 
A)  mass 
B)  volume 
C)  amount 
D)  temperature 
E)  time

Question 7

Which of the following represents a chemical change ?

Accepted Answer

A)  Cutting a string into two pieces. 
B)  Melting candle wax. 
C)  Evaporation of water from a lake. 
D)  Rusting of an iron nail. 
E)  Peeling an apple. 
A)  Cutting a string into two pieces. 
B)  Melting candle wax. 
C)  Evaporation of water from a lake. 
D)  Rusting of an iron nail. 
E)  Peeling an apple.

Question 8

Which of the following best describes a compound ?

Accepted Answer

A)  A compound is a mixture that can be separated into its constituent elements using physical methods . 
B)  A compound is a mixture that can be separated into its constituent elements using chemical methods . 
C)  A compound is a pure substance that can be separated into its constituent elements using physical methods . 
D)  A compound is a pure substance that can be separated into its constituent elements using chemical methods . 
A)  A compound is a mixture that can be separated into its constituent elements using physical methods . 
B)  A compound is a mixture that can be separated into its constituent elements using chemical methods . 
C)  A compound is a pure substance that can be separated into its constituent elements using physical methods . 
D)  A compound is a pure substance that can be separated into its constituent elements using chemical methods .

Question 9

The atomic radius of a beryllium atom is 111 pm. Express this distance in inches.

Accepted Answer

A)  2.67×10 - 8 inch 
B)  4.37×10 - 9 inch 
C)  2.42×10 - 13 inch 
D)  4.37×10 - 13 inch 
E)  43.7 inch 
A)  2.67×10 - 8 inch 
B)  4.37×10 - 9 inch 
C)  2.42×10 - 13 inch 
D)  4.37×10 - 13 inch 
E)  43.7 inch

Question 10

The speed limit is 70 miles per hour on some stretches of the interstate. What is this same speed in meters per second, (m/s)?
(1 mile = 1.60 km)

Accepted Answer

A)  1.9 m/s 
B)  31 m/s 
C)  1.6×102 m/s 
D)  1.1×105 m/s 
E)  1.1×102 m/s 
A)  1.9 m/s 
B)  31 m/s 
C)  1.6×102 m/s 
D)  1.1×105 m/s 
E)  1.1×102 m/s

Question 11

What digit(s) is(are) considered the digit of uncertainty in the following measurement?

Accepted Answer

A)  thousandths place 
B)  ones, hundredths, ten thousandths and hundred thousandths places 
C)  ten thousandths place 
D)  hundred thousandths place 
E)  millionth place 
A)  thousandths place 
B)  ones, hundredths, ten thousandths and hundred thousandths places 
C)  ten thousandths place 
D)  hundred thousandths place 
E)  millionth place

Question 12

The speed limit on the interstate in Virginia is 65 miles per hour. What is this speed in kilometers per second?
(1 km = 0.621 miles, 1 hour = 60 minutes and 1 minute = 60 seconds)

Accepted Answer

A)  0.029 km/sec 
B)  34. km/sec 
C)  40. km/sec 
D)  55. km/sec 
E)  1.0×102 km/sec 
A)  0.029 km/sec 
B)  34. km/sec 
C)  40. km/sec 
D)  55. km/sec 
E)  1.0×102 km/sec

Question 13

Exhibit 1-1 Consider the following figure that is a blow-up view of a region of a 50 mL burette to answer the following question(s).   The density of ethanol was measured in two steps. The first step involved measuring its volume using a burette. The mass of this volume was then measured.
-Refer to Exhibit 1-1. If the mass of the ethanol delivered was 28.217 grams, what is the density of this liquid reported to the correct number of significant digits?

Accepted Answer

A)  0.7893 g/mL 
B)  0.81 g/mL 
C)  0.790 g/mL 
D)  1.267 g/mL 
E)  0.7784 g/mL 
A)  0.7893 g/mL 
B)  0.81 g/mL 
C)  0.790 g/mL 
D)  1.267 g/mL 
E)  0.7784 g/mL

Question 14

What is the mass of 25.0 mL of an oil if its density is 0.843 g/mL?

Accepted Answer

A)  29.7 g 
B)  21.1 g 
C)  15.2 g 
D)  38.4 g 
E)  211 g 
A)  29.7 g 
B)  21.1 g 
C)  15.2 g 
D)  38.4 g 
E)  211 g

Question 15

How can "oil and vinegar" be classified?
(Two phases are present.)

Accepted Answer

A)  pure substance 
B)  element 
C)  compound 
D)  homogeneous mixture 
E)  heterogeneous mixture 
A)  pure substance 
B)  element 
C)  compound 
D)  homogeneous mixture 
E)  heterogeneous mixture

Question 16

What is the temperature given by the thermometer below written with the proper number of significant digits?

Accepted Answer

A)  32.3 ° C 
B)  32.30 ° C 
C)  32 ° C 
D)  32.300 ° C 
E)  30 ° C 
A)  32.3 ° C 
B)  32.30 ° C 
C)  32 ° C 
D)  32.300 ° C 
E)  30 ° C

Question 17

What prefix is used to indicate a base unit multiplied by 10 - 6?

Accepted Answer

A)  kilo 
B)  mega 
C)  micro 
D)  centi 
E)  deca 
A)  kilo 
B)  mega 
C)  micro 
D)  centi 
E)  deca

Question 18

Which of the following is an example of a homogeneous mixture ?
I. Water and dissolved salt
II. Water and sand
III. Carbonated water (soda) and ice

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these

Question 19

A carpenter must lay a floor that covers 1500 ft2. What is this area in cm2?
(1 foot = 12 inches and 1 inch = 2.54 cm)

Accepted Answer

A)  1.6 cm2 
B)  49 cm2 
C)  3.2×102 cm2 
D)  4.6×104 cm2 
E)  1.4×106 cm2 
A)  1.6 cm2 
B)  49 cm2 
C)  3.2×102 cm2 
D)  4.6×104 cm2 
E)  1.4×106 cm2

Question 20

The smallest bone in the human body, which is in the ear, has a mass of 0.0030 grams. What is this mass in pounds?
(1 pound = 454 grams)

Accepted Answer

A)  6.6×10 - 6 pounds 
B)  3.0×10 - 3 pounds 
C)  0.73 pounds 
D)  1.4 pounds 
E)  1.5×105 pounds 
A)  6.6×10 - 6 pounds 
B)  3.0×10 - 3 pounds 
C)  0.73 pounds 
D)  1.4 pounds 
E)  1.5×105 pounds

Exam 1: Introduction to Chemistry

Convert 38 ° F to the Celsius scale.

Which of the following is correctly classified as a hypothesis?

What length in millimeters can be reported for the rectangle below? (Note that the ruler measures in centimeters.)

A person weighs 83.2 kg. What is this person's weight in pounds? (1)00 pound = 454 grams)

What is the speed of an automobile given in miles per second (miles/sec) that is traveling 80. kilometer per hour (km/hour)? (1 km = 0.621 miles; 1 hour = 60 min; 1 min = 60 sec)

Which of the following measurements is considered a combination of one of the seven base units from which all other measurements can be made?

Which of the following represents a chemical change ?

Which of the following best describes a compound ?

The atomic radius of a beryllium atom is 111 pm. Express this distance in inches.

The speed limit is 70 miles per hour on some stretches of the interstate. What is this same speed in meters per second, (m/s)? (1 mile = 1.60 km)

What digit(s) is(are) considered the digit of uncertainty in the following measurement?

The speed limit on the interstate in Virginia is 65 miles per hour. What is this speed in kilometers per second? (1 km = 0.621 miles, 1 hour = 60 minutes and 1 minute = 60 seconds)

What is the mass of 25.0 mL of an oil if its density is 0.843 g/mL?

How can "oil and vinegar" be classified? (Two phases are present.)

What is the temperature given by the thermometer below written with the proper number of significant digits?

What prefix is used to indicate a base unit multiplied by 10 - 6?

Which of the following is an example of a homogeneous mixture ? I. Water and dissolved salt II. Water and sand III. Carbonated water (soda) and ice

A carpenter must lay a floor that covers 1500 ft2. What is this area in cm2? (1 foot = 12 inches and 1 inch = 2.54 cm)

The smallest bone in the human body, which is in the ear, has a mass of 0.0030 grams. What is this mass in pounds? (1 pound = 454 grams)

Atoms, Molecules, and Ions

Equations, the Mole, and Chemical Formulas

Chemical Reactions in Solution

Thermochemistry

The Gaseous State

Electronic Structure

The Periodic Table: Structure and Trends

Chemical Bonds

Molecular Structure and Bonding Theories

Liquids and Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Solutions of Acids and Bases

Reactions Between Acids and Bases

Chemical Thermodynamics

Electrochemistry

Transition Metals, Coordination Chemistry and Metallurgy

The Chemistry of Hydrogen, Elements in Groups 3A Through 6A, and the Noble Gases

Nuclear Chemistry

Organic Chemistry and Biochemistry

Filters

What prefix is used to indicate a base unit multiplied by 10^{- 6}?

A carpenter must lay a floor that covers 1500 ft². What is this area in cm²? (1 foot = 12 inches and 1 inch = 2.54 cm)