Question 1

Which one of the following is a mixture?

Accepted Answer

A) an aqueous solution of sugar 
B) pure water 
C) nitrogen gas 
D) copper metal 
E) table salt (sodium chloride) 
A) an aqueous solution of sugar 
B) pure water 
C) nitrogen gas 
D) copper metal 
E) table salt (sodium chloride)

Question 2

Three metals, and their densities, are shown below. If each were added to the same volume of water (density   1.00 cm3), which metal(s) would sink?

Accepted Answer

A) 1 only 
B) 2 only 
C) 3 only 
D) 1 and 2 only 
E) 1 and 3 only 
A) 1 only 
B) 2 only 
C) 3 only 
D) 1 and 2 only 
E) 1 and 3 only

Question 3

At what temperature do the Celsius and Fahrenheit scales read the same?

Accepted Answer

A) 40   
B) (  40   ) 
C) 11.4   
D) (  11.4   ) 
E) There is no temperature at which the two scales read the same. 
A) 40   
B) (  40   ) 
C) 11.4   
D) (  11.4   ) 
E) There is no temperature at which the two scales read the same.

Question 4

Jupiter's mass is estimated to be 1.90   1027 kg, and it has a diameter of 142,984 km. Assuming that Jupiter is spherical, estimate its density (the volume of a sphere is (4   r3) /3).

Accepted Answer

A) 0.620 g/cm3 
B) 1.61 g/cm3 
C) 1.24 g/cm3 
D) 0.00124 g/cm3 
E) 1240 g/cm3 
A) 0.620 g/cm3 
B) 1.61 g/cm3 
C) 1.24 g/cm3 
D) 0.00124 g/cm3 
E) 1240 g/cm3

Question 5

Filtration can be used to separate components in a mixture based on differences in ________

Accepted Answer

A) solubility. 
B) boiling point. 
C) melting point. 
D) particle size. 
E) color. 
A) solubility. 
B) boiling point. 
C) melting point. 
D) particle size. 
E) color.

Question 6

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 7

Which of the following is the SI base unit for mass?

Accepted Answer

A) g 
B) kg 
C) mg 
D) lb 
E) m 
A) g 
B) kg 
C) mg 
D) lb 
E) m

Question 8

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 9

Which technique would allow separation of the following substances?

Accepted Answer

A) distillation 
B) extraction 
C) filtration 
D) recrystallization 
E) chromatography 
A) distillation 
B) extraction 
C) filtration 
D) recrystallization 
E) chromatography

Question 10

Which of the following mixtures can be separated by filtration?

Accepted Answer

A) sugar dissolved in coffee 
B) sand and water 
C) gasoline 
D) alcohol dissolved in water 
E) air 
A) sugar dissolved in coffee 
B) sand and water 
C) gasoline 
D) alcohol dissolved in water 
E) air

Question 11

An irregularly shaped metal object with a mass of 25.43 g was placed in a graduated cylinder with water. The before and after volumes are shown below. What is the density of the metal?

Accepted Answer

A) 2.8 g/cm3 
B) 2.906 g/cm3 
C) 0.782 g/cm3 
D) 0.344 g/cm3 
E) 2.734 g/cm3 
A) 2.8 g/cm3 
B) 2.906 g/cm3 
C) 0.782 g/cm3 
D) 0.344 g/cm3 
E) 2.734 g/cm3

Question 12

Which diagram shown below represents condensation (an asterisk denotes the initial phase of the substance)?

Accepted Answer

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

Question 13

If you had equal masses of each of the following substances, which would occupy the greatest volume?

Accepted Answer

A) ice (d   0.917 g/mL) 
B) water (d   0.997 g/mL) 
C) beeswax (d   0.960 g/mL) 
D) cocoa butter (d   0.910 g/mL) 
E) aluminum (d   2.70 g/mL) 
A) ice (d   0.917 g/mL) 
B) water (d   0.997 g/mL) 
C) beeswax (d   0.960 g/mL) 
D) cocoa butter (d   0.910 g/mL) 
E) aluminum (d   2.70 g/mL)

Question 14

Which statement A-D about the reaction of nitrogen monoxide with oxygen, which is called combustion and is represented below by the following cartoon, is not correct? The reaction product is nitrogen dioxide.

Accepted Answer

A) Two molecules of nitrogen monoxide combine with one molecule of oxygen. 
B) Two atoms of nitrogen combine with four atoms of oxygen to produce two molecules of nitrogen dioxide. 
C) The equation is balanced because the number of atoms of each element does not change. 
D) The products are two molecules of nitrogen dioxide and released energy. 
E) Statements A-D all are correct. 
A) Two molecules of nitrogen monoxide combine with one molecule of oxygen. 
B) Two atoms of nitrogen combine with four atoms of oxygen to produce two molecules of nitrogen dioxide. 
C) The equation is balanced because the number of atoms of each element does not change. 
D) The products are two molecules of nitrogen dioxide and released energy. 
E) Statements A-D all are correct.

Question 15

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 16

Deposition is the process in which a ________ is converted into a ________.

Accepted Answer

A) liquid; solid 
B) gas; liquid 
C) gas; solid 
D) liquid; gas 
E) solid; liquid 
A) liquid; solid 
B) gas; liquid 
C) gas; solid 
D) liquid; gas 
E) solid; liquid

Question 17

Room temperature is often taken to be 25   C. What is this temperature in   F?

Accepted Answer

A) 46   F 
B) 45   F 
C) 14   F 
D) 77   F 
E) 72   F 
A) 46   F 
B) 45   F 
C) 14   F 
D) 77   F 
E) 72   F

Question 18

Identify the incorrect statement(s). A solution ________
I. can be a solid, liquid, or gas.
II. can be heterogeneous or homogeneous.
III. is a homogeneous mixture.

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 I 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 I and III are incorrect.

Question 19

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 20

Which of the following is a heterogeneous mixture?

Accepted Answer

A) air 
B) sugar dissolved in water 
C) muddy river water 
D) brass (an alloy of copper and zinc) 
E) table salt (sodium chloride) 
A) air 
B) sugar dissolved in water 
C) muddy river water 
D) brass (an alloy of copper and zinc) 
E) table salt (sodium chloride)

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

Which one of the following is a mixture?

Three metals, and their densities, are shown below. If each were added to the same volume of water (density 1.00 cm3), which metal(s) would sink?

At what temperature do the Celsius and Fahrenheit scales read the same?

Jupiter's mass is estimated to be 1.90 1027 kg, and it has a diameter of 142,984 km. Assuming that Jupiter is spherical, estimate its density (the volume of a sphere is (4 r3) /3).

Filtration can be used to separate components in a mixture based on differences in ________

Which of the following processes is a chemical reaction?

Which of the following is the SI base unit for mass?

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

Which technique would allow separation of the following substances?

Which of the following mixtures can be separated by filtration?

An irregularly shaped metal object with a mass of 25.43 g was placed in a graduated cylinder with water. The before and after volumes are shown below. What is the density of the metal?

Which diagram shown below represents condensation (an asterisk denotes the initial phase of the substance)?

If you had equal masses of each of the following substances, which would occupy the greatest volume?

Which statement A-D about the reaction of nitrogen monoxide with oxygen, which is called combustion and is represented below by the following cartoon, is not correct? The reaction product is nitrogen dioxide.

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 ________

Deposition is the process in which a ________ is converted into a ________.

Room temperature is often taken to be 25 C. What is this temperature in F?

Identify the incorrect statement(s). A solution ________ I. can be a solid, liquid, or gas. II. can be heterogeneous or homogeneous. III. is a homogeneous mixture.

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

Which of the following is a heterogeneous 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: 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

Three metals, and their densities, are shown below. If each were added to the same volume of water (density 1.00 cm³), which metal(s) would sink?

Jupiter's mass is estimated to be 1.90 10²⁷ kg, and it has a diameter of 142,984 km. Assuming that Jupiter is spherical, estimate its density (the volume of a sphere is (4 r³)/3).

Deposition is the process in which a is converted into a .