Question 1

Which one of the following is not a physical process or change?

Accepted Answer

A)  natural gas burning 
B)  water boiling 
C)  ice melting 
D)  iodine vaporizing 
E)  alcohol evaporating 
A)  natural gas burning 
B)  water boiling 
C)  ice melting 
D)  iodine vaporizing 
E)  alcohol evaporating

Question 2

The density of an object that weighs 10.0 g and occupies a volume of 2.5 cm3 is __________

Accepted Answer

A)  4.0 g/cm3. 
B)  4.0 cm3/g. 
C)  0.25 g/cm3. 
D)  0.25 cm3/g. 
E)  25 g/cm3. 
A)  4.0 g/cm3. 
B)  4.0 cm3/g. 
C)  0.25 g/cm3. 
D)  0.25 cm3/g. 
E)  25 g/cm3.

Question 3

A structural formula __________

Accepted Answer

A)  always shows correct bond distances and angles in a molecule. 
B)  is the same as a chemical formula. 
C)  shows how the molecule can be synthesized. 
D)  shows how atoms are connected in a chemical species. 
E)  is the same as a molecular formula. 
A)  always shows correct bond distances and angles in a molecule. 
B)  is the same as a chemical formula. 
C)  shows how the molecule can be synthesized. 
D)  shows how atoms are connected in a chemical species. 
E)  is the same as a molecular formula.

Question 4

Which one of the following values A-D contains four significant figures? If all do, choose E.

Accepted Answer

A)  0.0004 kg 
B)  0.0040 L 
C)  0.0400 m 
D)  0.4000 mm 
E)  All contain four significant figures. 
A)  0.0004 kg 
B)  0.0040 L 
C)  0.0400 m 
D)  0.4000 mm 
E)  All contain four significant figures.

Question 5

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 6

Which of the following is a pure substance?

Accepted Answer

A)  mineral water 
B)  blood 
C)  brass (an alloy of copper and zinc) 
D)  sucrose (table sugar) 
E)  beer 
A)  mineral water 
B)  blood 
C)  brass (an alloy of copper and zinc) 
D)  sucrose (table sugar) 
E)  beer

Question 7

When you place a piece of dry ice (solid carbon dioxide) on a plate at room temperature, you notice that no liquid forms, unlike ice that melts to form liquid water. This is because dry ice __________

Accepted Answer

A)  as a liquid quickly evaporates. 
B)  undergoes deposition instead of melting. 
C)  sublimes instead of melting. 
D)  does not exist in the liquid form at room temperature and pressure. 
E)  contains no water. 
A)  as a liquid quickly evaporates. 
B)  undergoes deposition instead of melting. 
C)  sublimes instead of melting. 
D)  does not exist in the liquid form at room temperature and pressure. 
E)  contains no water.

Question 8

A burette (shown below) was used to add dilute hydrochloric acid (HCl) to a solution containing sodium hydroxide (NaOH). If the burette initially was read as 0.00 mL, how much HCl has been delivered according to the reading in the figure?

Accepted Answer

A)  5.4 mL 
B)  5.40 mL 
C)  4.60 mL 
D)  4.3 mL 
E)  4.30 mL 
A)  5.4 mL 
B)  5.40 mL 
C)  4.60 mL 
D)  4.3 mL 
E)  4.30 mL

Question 9

Which of the following processes is a chemical reaction?

Accepted Answer

A)  distillation 
B)  combustion 
C)  filtration 
D)  condensation 
E)  sublimation 
A)  distillation 
B)  combustion 
C)  filtration 
D)  condensation 
E)  sublimation

Question 10

What might be the air temperature on a really hot day?

Accepted Answer

A)  25°C 
B)  273 K 
C)  298 K 
D)  40°C 
E)  373 K 
A)  25°C 
B)  273 K 
C)  298 K 
D)  40°C 
E)  373 K

Question 11

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 12

Which of the following is an element?

Accepted Answer

A)  Cl2 
B)  H2O 
C)  NaCl 
D)  MgO 
E)  HCl 
A)  Cl2 
B)  H2O 
C)  NaCl 
D)  MgO 
E)  HCl

Question 13

Which one of the following statements is not correct?

Accepted Answer

A)  Sodium and chlorine are elements. 
B)  Sodium chloride (table salt) is a compound. 
C)  Sodium chloride is a pure substance. 
D)  Sodium chloride is a heterogeneous mixture. 
E)  Sodium chloride added to water forms a solution. 
A)  Sodium and chlorine are elements. 
B)  Sodium chloride (table salt) is a compound. 
C)  Sodium chloride is a pure substance. 
D)  Sodium chloride is a heterogeneous mixture. 
E)  Sodium chloride added to water forms a solution.

Question 14

A gas forming a liquid is called ___________.

Accepted Answer

A)  condensation 
B)  deposition 
C)  melting 
D)  freezing 
E)  vaporization 
A)  condensation 
B)  deposition 
C)  melting 
D)  freezing 
E)  vaporization

Question 15

Medicines usually are dispensed in units of mg. What is the mass of a 50 mg tablet?

Accepted Answer

A)  50 grams 
B)  5.0 grams 
C)  0.50 grams 
D)  0.050 grams 
E)  0.0050 grams 
A)  50 grams 
B)  5.0 grams 
C)  0.50 grams 
D)  0.050 grams 
E)  0.0050 grams

Question 16

If an atom is 0.1 nm in diameter, how many atoms must be lined up to make a row 1 cm long?

Accepted Answer

A)  104 
B)  106 
C)  108 
D)  1010 
E)  1012 
A)  104 
B)  106 
C)  108 
D)  1010 
E)  1012

Question 17

Spanish mahogany has a density of 53 lb/ft3. Would you be able to lift a piece of mahogany that measured 10 in * 12 in *14 in?

Accepted Answer

A)  No, it would weigh approximately 200 lb. 
B)  No, it would be too awkward. 
C)  Yes, it would weigh approximately 25 lb. 
D)  Yes, it would weigh approximately 50 lb. 
E)  Yes, it would weigh approximately 5 lb. 
A)  No, it would weigh approximately 200 lb. 
B)  No, it would be too awkward. 
C)  Yes, it would weigh approximately 25 lb. 
D)  Yes, it would weigh approximately 50 lb. 
E)  Yes, it would weigh approximately 5 lb.

Question 18

A liquid forming a gas is called ___________.

Accepted Answer

A)  sublimation 
B)  deposition 
C)  melting 
D)  freezing 
E)  vaporization 
A)  sublimation 
B)  deposition 
C)  melting 
D)  freezing 
E)  vaporization

Question 19

Table sugar (sucrose) with the formula C12H22O11 is _____
I. an element.
II. a compound.
III. a mixture.

Accepted Answer

A)  Only I 
B)  Only II 
C)  Only III 
D)  Both I and III 
E)  Both II and III 
A)  Only I 
B)  Only II 
C)  Only III 
D)  Both I and III 
E)  Both II and III

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

Which one of the following is not a physical process or change?

The density of an object that weighs 10.0 g and occupies a volume of 2.5 cm3 is __________

A structural formula __________

Which one of the following values A-D contains four significant figures? If all do, choose E.

A pure substance __________

Which of the following is a pure substance?

When you place a piece of dry ice (solid carbon dioxide) on a plate at room temperature, you notice that no liquid forms, unlike ice that melts to form liquid water. This is because dry ice __________

A burette (shown below) was used to add dilute hydrochloric acid (HCl) to a solution containing sodium hydroxide (NaOH). If the burette initially was read as 0.00 mL, how much HCl has been delivered according to the reading in the figure?

Which of the following processes is a chemical reaction?

What might be the air temperature on a really hot day?

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

Which of the following is an element?

Which one of the following statements is not correct?

A gas forming a liquid is called ___________.

Medicines usually are dispensed in units of mg. What is the mass of a 50 mg tablet?

If an atom is 0.1 nm in diameter, how many atoms must be lined up to make a row 1 cm long?

Spanish mahogany has a density of 53 lb/ft3. Would you be able to lift a piece of mahogany that measured 10 in * 12 in *14 in?

A liquid forming a gas is called ___________.

Table sugar (sucrose) with the formula C12H22O11 is _____ I. an element. II. a compound. III. a mixture.

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: Structures and Applications

Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life

Chemical Kinetics: Reactions in the Air We Breathe

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acid-Base and Solubility Equilibria: Reactions in Soil and Water

Metal Ions: Colorful and Essential

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry: Applications to Energy and Medicine

Life and the Periodic Table

Filters

The density of an object that weighs 10.0 g and occupies a volume of 2.5 cm³ is __________

Spanish mahogany has a density of 53 lb/ft³. Would you be able to lift a piece of mahogany that measured 10 in * 12 in *14 in?

Table sugar (sucrose) with the formula C₁₂H₂₂O₁₁ is _____ I. an element. II. a compound. III. a mixture.