Question 1

Identify the following as a physical or chemical change: Bacteria convert milk to yogurt.

Accepted Answer

The answer of Identify the following as a physical or...

Question 2

The number 9.64000 × 105 contains how many significant figures?

Accepted Answer

Question 3

A centimeter corresponds to:

Accepted Answer

A) 10-2 meters. 
B) 10-3 meters. 
C) 10-6 meters. 
D) 10-9 meters. 
E) 10-12 meters. 
A) 10-2 meters. 
B) 10-3 meters. 
C) 10-6 meters. 
D) 10-9 meters. 
E) 10-12 meters.

Question 4

Give the correct number of significant figures to the problem below. 2.4 x 10-4 + 3.1 x 10-2 =

Accepted Answer

A) 5.5 x 10-6 
B) 5.5 x 10-8 
C) 5.5 x 10-4 
D) 3.1 x 10-2 
E) 2.4 x 10-4 
A) 5.5 x 10-6 
B) 5.5 x 10-8 
C) 5.5 x 10-4 
D) 3.1 x 10-2 
E) 2.4 x 10-4

Question 5

Convert 5.00 x 102 milliliters to quarts.(1L = 1.06 qt)

Accepted Answer

A) 1.88 qt 
B) 0.472 qt 
C) 0.528 qt 
D) 4.72 × 105 qt 
E) 5.28 × 105 qt 
A) 1.88 qt 
B) 0.472 qt 
C) 0.528 qt 
D) 4.72 × 105 qt 
E) 5.28 × 105 qt

Question 6

You just measured a block of wood and obtained the following information:
mass = 55.120 g
length = 8.5 cm
height = 4.3 cm
width = 3.3 cm
Determine the volume and density of the wood block.

Accepted Answer

Volume of the wood b

Question 7

How many cubic centimeters of an ore containing only 0.22% gold (by mass)must be processed to obtain $100.00 worth of gold? The density of the ore is 8.0 g/cm3 and the price of gold is $818 per troy ounce.(14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)

Accepted Answer

A) 0.48 cm3 
B) 220 cm3 
C) 1.4 × 103 cm3 
D) 1.7 × 103 cm3 
E) 1.8 × 104 cm3 
A) 0.48 cm3 
B) 220 cm3 
C) 1.4 × 103 cm3 
D) 1.7 × 103 cm3 
E) 1.8 × 104 cm3

Question 8

Give examples of three physical properties.

Accepted Answer

(Answers will vary.)

Question 9

Convert 4.5 x 104 to decimal format.

Accepted Answer

A) 45,000 
B) 4,500 
C) 0.00045 
D) 0.0045 
E) 0.000450 
A) 45,000 
B) 4,500 
C) 0.00045 
D) 0.0045 
E) 0.000450

Question 10

Classify the following as a pure substance or a mixture: Ice cream.

Accepted Answer

The answer of Classify the following as a pure substance...

Question 11

Which one of the following represents a chemical change?

Accepted Answer

A) boiling water to form steam 
B) burning a piece of coal 
C) heating lead until it melts 
D) mixing iron filings and sand at room temperature 
E) breaking glass 
A) boiling water to form steam 
B) burning a piece of coal 
C) heating lead until it melts 
D) mixing iron filings and sand at room temperature 
E) breaking glass

Question 12

Classify the following as either a physical or a chemical property: Water boils at 100°C.

Accepted Answer

The answer of Classify the following as either a physical...

Question 13

An automobile engine has a piston displacement of 1,600 cm3.Express this volume in cubic inches.(1 in = 2.54 cm)

Accepted Answer

Question 14

Define pure substance.

Accepted Answer

Matter tha

Question 15

In 1828, the diameter of the U.S.dime was changed to approximately 18 mm.What is this diameter when expressed in nanometers?

Accepted Answer

A) 1.8 × 109  nm 
B) 1.8 × 107 nm 
C) 1.8 × 101 nm 
D) 1.8 × 10-5 nm 
E) 1.8 × 10-10 nm 
A) 1.8 × 109  nm 
B) 1.8 × 107 nm 
C) 1.8 × 101 nm 
D) 1.8 × 10-5 nm 
E) 1.8 × 10-10 nm

Question 16

Classify the following as a physical or chemical change: Antifreeze boils out of a radiator.

Accepted Answer

The answer of Classify the following as a physical or...

Question 17

Define compound.

Accepted Answer

A compound is a substance comp

Question 18

Identify the following as a physical or chemical change: Corrosion of a metal.

Accepted Answer

The answer of Identify the following as a physical or...

Question 19

Give three examples of pure substances.

Accepted Answer

(Answers will vary.)

Question 20

The density of lead is 11.4 g/cm3.Express this density in pounds per cubic foot.

Accepted Answer

Exam 1: Chemistry: the Study of Change

Identify the following as a physical or chemical change: Bacteria convert milk to yogurt.

The number 9.64000 × 105 contains how many significant figures?

A centimeter corresponds to:

Give the correct number of significant figures to the problem below. 2.4 x 10-4 + 3.1 x 10-2 =

Convert 5.00 x 102 milliliters to quarts.(1L = 1.06 qt)

You just measured a block of wood and obtained the following information: mass = 55.120 g length = 8.5 cm height = 4.3 cm width = 3.3 cm Determine the volume and density of the wood block.

How many cubic centimeters of an ore containing only 0.22% gold (by mass)must be processed to obtain $100.00 worth of gold? The density of the ore is 8.0 g/cm3 and the price of gold is $818 per troy ounce.(14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)

Give examples of three physical properties.

Convert 4.5 x 104 to decimal format.

Classify the following as a pure substance or a mixture: Ice cream.

Which one of the following represents a chemical change?

Classify the following as either a physical or a chemical property: Water boils at 100°C.

An automobile engine has a piston displacement of 1,600 cm3.Express this volume in cubic inches.(1 in = 2.54 cm)

Define pure substance.

In 1828, the diameter of the U.S.dime was changed to approximately 18 mm.What is this diameter when expressed in nanometers?

Classify the following as a physical or chemical change: Antifreeze boils out of a radiator.

Define compound.

Identify the following as a physical or chemical change: Corrosion of a metal.

Give three examples of pure substances.

The density of lead is 11.4 g/cm3.Express this density in pounds per cubic foot.

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The number 9.64000 × 10⁵ contains how many significant figures?

Give the correct number of significant figures to the problem below. 2.4 x 10^-4 + 3.1 x 10^-2 =

Convert 5.00 x 10² milliliters to quarts.(1L = 1.06 qt)

How many cubic centimeters of an ore containing only 0.22% gold (by mass)must be processed to obtain $100.00 worth of gold? The density of the ore is 8.0 g/cm³ and the price of gold is $818 per troy ounce.(14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)

Convert 4.5 x 10⁴ to decimal format.

An automobile engine has a piston displacement of 1,600 cm³.Express this volume in cubic inches.(1 in = 2.54 cm)

The density of lead is 11.4 g/cm³.Express this density in pounds per cubic foot.