Question 1

Which one of the following is a pure substance?

Accepted Answer

A) concrete 
B) wood 
C) salt water 
D) elemental copper 
E) milk 
A) concrete 
B) wood 
C) salt water 
D) elemental copper 
E) milk

Question 2

The correct answer (reported to the proper number of significant figures)to the following is __________.
11.5 × 8.78 = __________

Accepted Answer

The answer of The correct answer (reported to the proper...

Question 3

The number with the most significant zeros is __________.

Accepted Answer

A) 0.00002510 
B) 0.02500001 
C) 250000001 
D) 2.501 × 10-7 
E) 2.5100000 
A) 0.00002510 
B) 0.02500001 
C) 250000001 
D) 2.501 × 10-7 
E) 2.5100000

Question 4

The density of lead is 11.4 g/cm3. The mass of a lead ball with a radius of 0.50 mm is __________ g.

Accepted Answer

A) 6.0 
B) 4.6 × 10-2 
C) 4.6 × 10-5 
D) 6.0 × 10-3 
E) 4.6 
A) 6.0 
B) 4.6 × 10-2 
C) 4.6 × 10-5 
D) 6.0 × 10-3 
E) 4.6

Question 5

Which of the following is not an exact number?

Accepted Answer

A) The number of seconds in a year. 
B) The number of millimeters in a kilometer. 
C) The number of liters in a gallon. 
D) The number of centimeters in an inch. 
E) The number of grams in a kilogram. 
A) The number of seconds in a year. 
B) The number of millimeters in a kilometer. 
C) The number of liters in a gallon. 
D) The number of centimeters in an inch. 
E) The number of grams in a kilogram.

Question 6

"Absolute zero" refers to __________.

Accepted Answer

A) 0 Kelvin 
B) 0° Fahrenheit 
C) 0° Celsius 
D) °C + 9/5(°F - 32) 
E) 273.15 °C 
A) 0 Kelvin 
B) 0° Fahrenheit 
C) 0° Celsius 
D) °C + 9/5(°F - 32) 
E) 273.15 °C

Question 7

The density (in g/cm3)of a gold nugget that has a volume of 1.68 cm3 and a mass of 32.4 g is __________.

Accepted Answer

A) 0.0519 
B) 19.3 
C) 54.4 
D) 0.0184 
E) 32.4 
A) 0.0519 
B) 19.3 
C) 54.4 
D) 0.0184 
E) 32.4

Question 8

Mass and volume are often referred to as __________ properties of substances.

Accepted Answer

The answer of Mass and volume are often referred to...

Question 9

Round the following number to four significant figures and express the result in standard exponential notation: 229.613

Accepted Answer

A) 0.2296 × 103 
B) 229.6 
C) 2.296 × 10-2 
D) 2.296 × 102 
E) 22.96 × 10-1 
A) 0.2296 × 103 
B) 229.6 
C) 2.296 × 10-2 
D) 2.296 × 102 
E) 22.96 × 10-1

Question 10

Expressing a number in scientific notation __________.

Accepted Answer

A) changes its value 
B) removes ambiguity as to the significant figures 
C) removes significant zeros 
D) allows to increase the number's precision 
E) all of the above 
A) changes its value 
B) removes ambiguity as to the significant figures 
C) removes significant zeros 
D) allows to increase the number's precision 
E) all of the above

Question 11

Accuracy refers to __________.

Accepted Answer

A) how close a measured number is to zero 
B) how close a measured number is to the calculated value 
C) how close a measured number is to other measured numbers 
D) how close a measured number is to the true value 
E) how close a measured number is to infinity 
A) how close a measured number is to zero 
B) how close a measured number is to the calculated value 
C) how close a measured number is to other measured numbers 
D) how close a measured number is to the true value 
E) how close a measured number is to infinity

Question 12

= __________

Accepted Answer

A) 113.73635 
B) 113.736 
C) 113.74 
D) 113.7 
E) 1.1 × 102 
A) 113.73635 
B) 113.736 
C) 113.74 
D) 113.7 
E) 1.1 × 102

Question 13

Which of the following are chemical processes? 1. rusting of a nail
2. freezing of water
3. decomposition of water into hydrogen and oxygen gases
4. compression of oxygen gas

Accepted Answer

A) 2, 3, 4 
B) 1, 3, 4 
C) 1, 3 
D) 1, 2 
E) 1, 4 
A) 2, 3, 4 
B) 1, 3, 4 
C) 1, 3 
D) 1, 2 
E) 1, 4

Question 14

There are __________ ng in a pg.

Accepted Answer

A) 0.001 
B) 1000 
C) 0.01 
D) 100 
E) 10 
A) 0.001 
B) 1000 
C) 0.01 
D) 100 
E) 10

Question 15

An element cannot __________.

Accepted Answer

A) be part of a heterogeneous mixture 
B) be part of a homogeneous mixture 
C) be separated into other substances by chemical means 
D) interact with other elements to form compounds 
E) be a pure substance 
A) be part of a heterogeneous mixture 
B) be part of a homogeneous mixture 
C) be separated into other substances by chemical means 
D) interact with other elements to form compounds 
E) be a pure substance

Question 16

A one degree of temperature difference is the smallest on the __________ temperature scale.

Accepted Answer

A) Kelvin 
B) Celsius 
C) Fahrenheit 
D) Kelvin and Celsius 
E) Fahrenheit and Celsius 
A) Kelvin 
B) Celsius 
C) Fahrenheit 
D) Kelvin and Celsius 
E) Fahrenheit and Celsius

Question 17

There are 6 significant figures in the number 0.003702.

Accepted Answer

A) True 
 B)False

Question 18

There should be __________ significant figures in the answer to the following computation.

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 19

In which one of the following numbers are all of the zeros significant?

Accepted Answer

A) 100.090090 
B) 0.143290 
C) 0.05843 
D) 0.1000 
E) 00.0030020 
A) 100.090090 
B) 0.143290 
C) 0.05843 
D) 0.1000 
E) 00.0030020

Question 20

The correct answer (reported to the proper number of significant figures)to the following is __________. 6.3 × 3.25 = _____

Accepted Answer

A) 20. 
B) 20.475 
C) 20.48 
D) 20.5 
E) 21 
A) 20. 
B) 20.475 
C) 20.48 
D) 20.5 
E) 21

Exam 1: Introduction: Matter and Measurement

Which one of the following is a pure substance?

The correct answer (reported to the proper number of significant figures)to the following is __________. 11.5 × 8.78 = __________

The number with the most significant zeros is __________.

The density of lead is 11.4 g/cm3. The mass of a lead ball with a radius of 0.50 mm is __________ g.

Which of the following is not an exact number?

"Absolute zero" refers to __________.

The density (in g/cm3)of a gold nugget that has a volume of 1.68 cm3 and a mass of 32.4 g is __________.

Mass and volume are often referred to as __________ properties of substances.

Round the following number to four significant figures and express the result in standard exponential notation: 229.613

Expressing a number in scientific notation __________.

Accuracy refers to __________.

= __________

Which of the following are chemical processes? 1. rusting of a nail 2. freezing of water 3. decomposition of water into hydrogen and oxygen gases 4. compression of oxygen gas

There are __________ ng in a pg.

An element cannot __________.

A one degree of temperature difference is the smallest on the __________ temperature scale.

There are 6 significant figures in the number 0.003702.

There should be __________ significant figures in the answer to the following computation.

In which one of the following numbers are all of the zeros significant?

The correct answer (reported to the proper number of significant figures)to the following is __________. 6.3 × 3.25 = _____

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The correct answer (reported to the proper number of significant figures)to the following is . 11.5 × 8.78 =

The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50 mm is __________ g.

The density (in g/cm³)of a gold nugget that has a volume of 1.68 cm³ and a mass of 32.4 g is __________.

The correct answer (reported to the proper number of significant figures)to the following is ______. 6.3 × 3.25 = _