Question 1

Which of the following can be classified as a pure compound?

Accepted Answer

A) alcohol in water,  C2H5OHinH2O 
B) sugar, C12H22O11 
C) carbon,C 
D) iodine,   
E) Sulfur,S8 
A) alcohol in water,  C2H5OHinH2O 
B) sugar, C12H22O11 
C) carbon,C 
D) iodine,   
E) Sulfur,S8

Question 2

In which of the following numbers are all of the zeros not significant?

Accepted Answer

A) 3300 
B) 0.0450 
C) 45.060 
D) 607.80 
E) 5408 
A) 3300 
B) 0.0450 
C) 45.060 
D) 607.80 
E) 5408

Question 3

68°C is the same as

Accepted Answer

A) 341 K. 
B) 321 K. 
C) 285 K. 
D) 205 K. 
E) 158 K. 
A) 341 K. 
B) 321 K. 
C) 285 K. 
D) 205 K. 
E) 158 K.

Question 4

What is the numerical value of  
? Express your answer using the correct number of significant figures.

Accepted Answer

A)    
B) 1 ×   
C) 1.2 ×   
D) 1.23 ×   
E) 1.227 ×   
A)    
B) 1 ×   
C) 1.2 ×   
D) 1.23 ×   
E) 1.227 ×

Question 5

What is the numerical value of 1.2 × 1.222? Express your answer using the correct number of significant figures.

Accepted Answer

A) 1.5 
B) 1.47 
C) 1.466 
D) 1.4664 
E) none of the above 
A) 1.5 
B) 1.47 
C) 1.466 
D) 1.4664 
E) none of the above

Question 6

What is the temperature at which the Celsius and Fahrenheit scales read the same?

Accepted Answer

A) -40 
B) 100 
C) 25 
D) -100 
E) Never 
A) -40 
B) 100 
C) 25 
D) -100 
E) Never

Question 7

Which value is closest to the amount of gasoline in a small car with a full tank (which contains about 13 gallons)?

Accepted Answer

A) 450 mL 
B) 50 L 
C) 85 μL 
D) 12 kL 
E) 3.5 × 102 dL 
A) 450 mL 
B) 50 L 
C) 85 μL 
D) 12 kL 
E) 3.5 × 102 dL

Question 8

Find the difference between two masses measured as 123.6 grams and 115.972 grams.Express the answer to the correct number of significant figures.

Accepted Answer

A) 7.6 grams 
B) 7.63 grams 
C) 7.628 grams 
D) 8.0 grams 
E) 8 grams 
A) 7.6 grams 
B) 7.63 grams 
C) 7.628 grams 
D) 8.0 grams 
E) 8 grams

Question 9

Caffeine,the active ingredient in coffee,is composed of eight atoms of carbon,ten atoms of hydrogen,and four atoms of nitrogen,and two atoms of oxygen.The chemical formula of caffeine is written

Accepted Answer

A) CHNO 
B) C8H10N4O2 
C) C8H10N4 
D) C8H12N4O4 
E) C8H10N4O 
A) CHNO 
B) C8H10N4O2 
C) C8H10N4 
D) C8H12N4O4 
E) C8H10N4O

Question 10

What is the numerical value of (2.1 ×  
)(4.0 ×  
)expressed to the correct number of significant figures?

Accepted Answer

A) 8.4 
B) 8.4 ×   
C) 8.4 ×   
D) 8.4 ×   
E) None of the above. 
A) 8.4 
B) 8.4 ×   
C) 8.4 ×   
D) 8.4 ×   
E) None of the above.

Question 11

An extra-strength aspirin contains 0.500 g of aspirin.How many grains is this?

Accepted Answer

A) 7.72 grains 
B) 13.0 grains 
C) 32.4 grains 
D) 65.3 grains 
E) 3.24 × 104 grains 
A) 7.72 grains 
B) 13.0 grains 
C) 32.4 grains 
D) 65.3 grains 
E) 3.24 × 104 grains

Question 12

Which of the following is a physical property of aspirin?

Accepted Answer

A) Aspirin can moderate some heart disorders when ingested. 
B) Aspirin does not decompose when tightly sealed in a bottle. 
C) Aspirin yields carbon dioxide and water vapor when burned. 
D) Aspirin can be pressed into tablets when mixed with cornstarch. 
E) Aspirin reacts with water to produce salicylic acid and acetic acid. 
A) Aspirin can moderate some heart disorders when ingested. 
B) Aspirin does not decompose when tightly sealed in a bottle. 
C) Aspirin yields carbon dioxide and water vapor when burned. 
D) Aspirin can be pressed into tablets when mixed with cornstarch. 
E) Aspirin reacts with water to produce salicylic acid and acetic acid.

Question 13

Gasoline has a density of about 0.65 g/mL.How much does 34.0 L weigh in pounds?

Accepted Answer

Convert 34.0 L to mL then mult

Question 14

Which of the following causes a chemical change?

Accepted Answer

A) winding an alarm clock 
B) metabolizing fat 
C) slicing a tomato 
D) digging a hole 
E) pumping gasoline 
A) winding an alarm clock 
B) metabolizing fat 
C) slicing a tomato 
D) digging a hole 
E) pumping gasoline

Question 15

The amount of matter in an object is its

Accepted Answer

A) density. 
B) mass. 
C) specific gravity. 
D) volume. 
E) weight. 
A) density. 
B) mass. 
C) specific gravity. 
D) volume. 
E) weight.

Question 16

How many meters are there in one kilometer?

Accepted Answer

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

Question 17

Which of the following are states of matter?

Accepted Answer

A) solid 
B) suspension 
C) solution 
D) precipitate 
E) all of the above 
A) solid 
B) suspension 
C) solution 
D) precipitate 
E) all of the above

Question 18

What is the density of a 6.0 × 102 mL liquid sample that weighs 450 g?

Accepted Answer

A) 1050 g/mL 
B) 270 g/mL 
C) 1.33 g/mL 
D) 0.75 g/mL 
E) 0.37 g/mL 
A) 1050 g/mL 
B) 270 g/mL 
C) 1.33 g/mL 
D) 0.75 g/mL 
E) 0.37 g/mL

Question 19

How many ng are there in 5.2 mg?

Accepted Answer

A) 1.9 ×  
Ng 
B) 1.9 ×  
Ng 
C) 5.2 ×  
Ng 
D) 5.2 ×  
Ng 
E) 5.2 ×  
Ng 
A) 1.9 ×  
Ng 
B) 1.9 ×  
Ng 
C) 5.2 ×  
Ng 
D) 5.2 ×  
Ng 
E) 5.2 ×  
Ng

Question 20

Which choice best describes the degree of uncertainty in the measurement 16.30 g?

Accepted Answer

A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) ±1.00 g 
D) ±0.10 g 
E) ±0.01 g 
A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) ±1.00 g 
D) ±0.10 g 
E) ±0.01 g

Exam 1: Matter and Measurements

Which of the following can be classified as a pure compound?

In which of the following numbers are all of the zeros not significant?

68°C is the same as

What is the numerical value of ? Express your answer using the correct number of significant figures.

What is the numerical value of 1.2 × 1.222? Express your answer using the correct number of significant figures.

What is the temperature at which the Celsius and Fahrenheit scales read the same?

Which value is closest to the amount of gasoline in a small car with a full tank (which contains about 13 gallons)?

Find the difference between two masses measured as 123.6 grams and 115.972 grams.Express the answer to the correct number of significant figures.

Caffeine,the active ingredient in coffee,is composed of eight atoms of carbon,ten atoms of hydrogen,and four atoms of nitrogen,and two atoms of oxygen.The chemical formula of caffeine is written

What is the numerical value of (2.1 × )(4.0 × )expressed to the correct number of significant figures?

An extra-strength aspirin contains 0.500 g of aspirin.How many grains is this?

Which of the following is a physical property of aspirin?

Gasoline has a density of about 0.65 g/mL.How much does 34.0 L weigh in pounds?

Which of the following causes a chemical change?

The amount of matter in an object is its

How many meters are there in one kilometer?

Which of the following are states of matter?

What is the density of a 6.0 × 102 mL liquid sample that weighs 450 g?

How many ng are there in 5.2 mg?

Which choice best describes the degree of uncertainty in the measurement 16.30 g?

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

What is the density of a 6.0 × 10² mL liquid sample that weighs 450 g?