Question 1

If the following operations are carried out, how many significant figures should be reported in the answer?

Accepted Answer

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

Question 2

The number 3.42   103 converted from scientific notation would be written as ________ and contain ________ significant figures.

Accepted Answer

A) 0.00342; three 
B) 0.00342; five 
C) 3.42; three 
D) 3420; three 
E) 3420; four 
A) 0.00342; three 
B) 0.00342; five 
C) 3.42; three 
D) 3420; three 
E) 3420; four

Question 3

A hypothesis is ________

Accepted Answer

A) an explanation that cannot be validated. 
B) a scientific theory used to explain observations. 
C) an explanation of observed processes that needs to be tested. 
D) the entire process through which scientific phenomena are explained. 
E) one side of a right triangle. 
A) an explanation that cannot be validated. 
B) a scientific theory used to explain observations. 
C) an explanation of observed processes that needs to be tested. 
D) the entire process through which scientific phenomena are explained. 
E) one side of a right triangle.

Question 4

Which of the following depicts a heterogeneous mixture?

Accepted Answer

A)    
B)    
C)    
D)    
E) None of the above are heterogeneous mixtures. 
A)    
B)    
C)    
D)    
E) None of the above are heterogeneous mixtures.

Question 5

Orange juice with pulp is an example of ________

Accepted Answer

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

Question 6

Liquid nitrogen boils at 77 K. What is this temperature in F?

Accepted Answer

A) (  196   F) 
B) (   321   F 
C) (  256   F 
D) (  77   F) 
E) (  352   F) 
A) (  196   F) 
B) (   321   F 
C) (  256   F 
D) (  77   F) 
E) (  352   F)

Question 7

If the following operations are carried out, how would the final answer be reported?

Accepted Answer

A) 195.19 
B) 195.2 
C) 195 
D) 2.00   102 
E) 195.5 
A) 195.19 
B) 195.2 
C) 195 
D) 2.00   102 
E) 195.5

Question 8

Which of the following choices would correctly use conversion factors and units to convert a measurement in micrometers to kilometers?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

Which one of the following statements is not correct?

Accepted Answer

A) A compound has a specific constant composition. 
B) The composition of a mixture can vary. 
C) A compound has specific constant properties. 
D) The properties of a mixture can vary. 
E) Mixtures can not be homogeneous. 
A) A compound has a specific constant composition. 
B) The composition of a mixture can vary. 
C) A compound has specific constant properties. 
D) The properties of a mixture can vary. 
E) Mixtures can not be homogeneous.

Question 10

If the following operations are carried out, how many significant figures should be reported in the answer?

Accepted Answer

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

Question 11

Which one of the following is not a correct statement?

Accepted Answer

A) Vodka is a solution. 
B) Water (H2O) is a compound. 
C) Sodium chloride (table salt) is a compound. 
D) Silver is an element. 
E) Sugar dissolved in water is a heterogeneous mixture. 
A) Vodka is a solution. 
B) Water (H2O) is a compound. 
C) Sodium chloride (table salt) is a compound. 
D) Silver is an element. 
E) Sugar dissolved in water is a heterogeneous mixture.

Question 12

Which of the following represents a chemical property of copper metal?

Accepted Answer

A) Copper metal conducts heat. 
B) Copper metal reacts with nitric acid to produce copper(II) nitrate. 
C) Copper metal melts at 1085  C. 
D) Copper metal conducts electricity. 
E) Copper metal has an orange color. 
A) Copper metal conducts heat. 
B) Copper metal reacts with nitric acid to produce copper(II) nitrate. 
C) Copper metal melts at 1085  C. 
D) Copper metal conducts electricity. 
E) Copper metal has an orange color.

Question 13

Which of the following length measurements is the shortest?

Accepted Answer

A) a 1.1 cm button 
B) a 1.1   103 mm piece of string 
C) a 1.1 $\mu$m long insect 
D) a 1.1   10-4 km diameter coin 
E) a 0.11 m piece of tape 
A) a 1.1 cm button 
B) a 1.1   103 mm piece of string 
C) a 1.1 $\mu$m long insect 
D) a 1.1   10-4 km diameter coin 
E) a 0.11 m piece of tape

Question 14

Identify the incorrect statement(s). A pure substance can be ________
I. an element or a compound.
II. heterogeneous or homogeneous.
III. a solution.

Accepted Answer

A) Only I is incorrect. 
B) Only II is incorrect. 
C) Only III is incorrect. 
D) Both I and II are incorrect. 
E) Both II and III are incorrect. 
A) Only I is incorrect. 
B) Only II is incorrect. 
C) Only III is incorrect. 
D) Both I and II are incorrect. 
E) Both II and III are incorrect.

Question 15

In the movie The Italian Job, thieves steal gold bullion. One plan is to carry the ingots of gold off in suitcases. If each suitcase were 19 inches   14 inches   10 inches, approximately how much would each suitcase weigh when filled with gold? The volume of each suitcase is 4.4    104 mL, the molar mass of gold is 197 g/mol, and the density of gold is 19.3 g/mL.

Accepted Answer

A) 2,300 g 
B) 850 kg 
C) 4,300 g 
D) 167 mg 
E) 550 kg 
A) 2,300 g 
B) 850 kg 
C) 4,300 g 
D) 167 mg 
E) 550 kg

Question 16

How many 100 mg tablets can be produced from 100 kg of a pharmaceutical product?

Accepted Answer

A) 1,000 
B) 10,000 
C) 100,000 
D) 1,000,000 
E) 10,000,000 
A) 1,000 
B) 10,000 
C) 100,000 
D) 1,000,000 
E) 10,000,000

Question 17

Which of the following targets was used by a precise but inaccurate archer?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

A pure substance ________

Accepted Answer

A) can not be separated into simpler substances by physical means. 
B) can have a composition that varies from sample to sample. 
C) must be an element. 
D) has different chemical and physical properties depending on its source. 
E) must be a compound. 
A) can not be separated into simpler substances by physical means. 
B) can have a composition that varies from sample to sample. 
C) must be an element. 
D) has different chemical and physical properties depending on its source. 
E) must be a compound.

Question 19

________ is an example of an extensive property.

Accepted Answer

A) Density 
B) Boiling point 
C) Color 
D) Volume 
E) Malleability 
A) Density 
B) Boiling point 
C) Color 
D) Volume 
E) Malleability

Question 20

Given the following figure, which of the measurements listed is the best estimate of the length of the aluminum rod?

Accepted Answer

A) 1.8 cm 
B) 1.81 cm 
C) 1.810 cm 
D) 1.9 cm 
E) 2 cm 
A) 1.8 cm 
B) 1.81 cm 
C) 1.810 cm 
D) 1.9 cm 
E) 2 cm

Exam 1: Matter and Energy: The Origin of the Universe

If the following operations are carried out, how many significant figures should be reported in the answer?

The number 3.42 103 converted from scientific notation would be written as ________ and contain ________ significant figures.

A hypothesis is ________

Which of the following depicts a heterogeneous mixture?

Orange juice with pulp is an example of ________

Liquid nitrogen boils at 77 K. What is this temperature in F?

If the following operations are carried out, how would the final answer be reported?

Which of the following choices would correctly use conversion factors and units to convert a measurement in micrometers to kilometers?

Which one of the following statements is not correct?

If the following operations are carried out, how many significant figures should be reported in the answer?

Which one of the following is not a correct statement?

Which of the following represents a chemical property of copper metal?

Which of the following length measurements is the shortest?

Identify the incorrect statement(s). A pure substance can be ________ I. an element or a compound. II. heterogeneous or homogeneous. III. a solution.

How many 100 mg tablets can be produced from 100 kg of a pharmaceutical product?

Which of the following targets was used by a precise but inaccurate archer?

A pure substance ________

________ is an example of an extensive property.

Given the following figure, which of the measurements listed is the best estimate of the length of the aluminum rod?

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

The number 3.42 10³ converted from scientific notation would be written as and contain significant figures.