Question 1

Which one of the following statements is not correct?

Accepted Answer

A)  Helium is an element. 
B)  Table salt (sodium chloride) is a compound. 
C)  Water is a pure substance. 
D)  Air is a solution. 
E)  Elements occur only in the form of individual atoms. 
A)  Helium is an element. 
B)  Table salt (sodium chloride) is a compound. 
C)  Water is a pure substance. 
D)  Air is a solution. 
E)  Elements occur only in the form of individual atoms.

Question 2

A solid directly forming a vapor or 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 3

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 4

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 5

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 6

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 7

You measure and find that an object has a mass of 25.15 g and a volume of 9.3 cm3. What would you report as the density of the object?

Accepted Answer

A)  2.704 g/cm3 
B)  2.70 g/cm3 
C)  2.7 g/cm3 
D)  3 g/cm3 
E)  2.704301075 g/cm3 
A)  2.704 g/cm3 
B)  2.70 g/cm3 
C)  2.7 g/cm3 
D)  3 g/cm3 
E)  2.704301075 g/cm3

Question 8

Which of the following is a chemical property?

Accepted Answer

A)  Hydrogen is flammable. 
B)  Hydrogen is a gas. 
C)  Hydrogen gas has mass. 
D)  The boiling point of hydrogen is 20 K. 
E)  Hydrogen gas exerts pressure on the walls of a container. 
A)  Hydrogen is flammable. 
B)  Hydrogen is a gas. 
C)  Hydrogen gas has mass. 
D)  The boiling point of hydrogen is 20 K. 
E)  Hydrogen gas exerts pressure on the walls of a container.

Question 9

A liquid forming a solid 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 10

Which one of the following is not classified correctly?

Accepted Answer

A)  Distilled water is a compound. 
B)  Gold is an element. 
C)  Air is a solution. 
D)  Table salt (sodium chloride) is a mixture. 
E)  Salad dressing is a suspension. 
A)  Distilled water is a compound. 
B)  Gold is an element. 
C)  Air is a solution. 
D)  Table salt (sodium chloride) is a mixture. 
E)  Salad dressing is a suspension.

Question 11

The summit of Mt. Humphreys, the highest point in Arizona, is 12,600 ft. How many meters is this?
(1 m = 1.0936 yd, 1 yd = 3 ft exactly)

Accepted Answer

A)  4,593 m 
B)  3,841 m 
C)  34,565 m 
D)  41,338 m 
E)  37,800 m 
A)  4,593 m 
B)  3,841 m 
C)  34,565 m 
D)  41,338 m 
E)  37,800 m

Question 12

Distillation may be used to separate components in a mixture based on differences in __________

Accepted Answer

A)  solubilities. 
B)  boiling points. 
C)  melting points. 
D)  masses. 
E)  color. 
A)  solubilities. 
B)  boiling points. 
C)  melting points. 
D)  masses. 
E)  color.

Question 13

Which statement A-D about the reaction of methane with oxygen, which is called combustion and is represented by the reaction equation below, is not correct? The reaction products are carbon dioxide and water.
CH4 + 2O2 $\leftrightarrow$ CO2 + 2H2O

Accepted Answer

A)  One molecule of methane combines with two molecules of oxygen. 
B)  The products are one molecule of carbon dioxide and two molecules of water. 
C)  The equation is balanced because the number of atoms of each element does not change. 
D)  Four atoms of hydrogen combine with four atoms of oxygen to produce water. 
E)  Statements A-D all are correct. 
A)  One molecule of methane combines with two molecules of oxygen. 
B)  The products are one molecule of carbon dioxide and two molecules of water. 
C)  The equation is balanced because the number of atoms of each element does not change. 
D)  Four atoms of hydrogen combine with four atoms of oxygen to produce water. 
E)  Statements A-D all are correct.

Question 14

Which of the following is a homogeneous mixture?

Accepted Answer

A)  filtered water 
B)  chicken noodle soup 
C)  clouds 
D)  trail mix snack 
E)  fruit salad 
A)  filtered water 
B)  chicken noodle soup 
C)  clouds 
D)  trail mix snack 
E)  fruit salad

Question 15

The following measurements of the mass of an aspirin tablet were made by different students in a lab. Each set gives the results of 3 measurements followed by the average. Which set produced the most accurate result? All values are in grams. The standard value reported by an analytical laboratory was 1.501 g.

Accepted Answer

A)  1.513, 1.503, 1.522 = 1.513 
B)  1.513, 1.511, 1.450 = 1.491 
C)  1.513, 1.459, 1.533 = 1.502 
D)  1.513, 1.517, 1.512 = 1.514 
E)  1.513, 1.510, 1.523 = 1.515 
A)  1.513, 1.503, 1.522 = 1.513 
B)  1.513, 1.511, 1.450 = 1.491 
C)  1.513, 1.459, 1.533 = 1.502 
D)  1.513, 1.517, 1.512 = 1.514 
E)  1.513, 1.510, 1.523 = 1.515

Question 16

The density of quartz is 165 lb/ft3. A clear crystal with a mass of 26.5 g is found to displace 10.0 cm3 of water. The crystal has a density __________

Accepted Answer

A)  of 2.65 g/cm3 and therefore is most likely quartz. 
B)  of 2.65 g/cm3 and therefore is not quartz. 
C)  of 2.75 g/cm3 and might be quartz. Better measurements are needed for a definitive test. 
D)  of 2.55 g/cm3. Better measurements are needed for a definitive test. 
E)  very different from that of quartz. 
A)  of 2.65 g/cm3 and therefore is most likely quartz. 
B)  of 2.65 g/cm3 and therefore is not quartz. 
C)  of 2.75 g/cm3 and might be quartz. Better measurements are needed for a definitive test. 
D)  of 2.55 g/cm3. Better measurements are needed for a definitive test. 
E)  very different from that of quartz.

Question 17

Indicate which of the following common laboratory devices will deliver 25 mL of a solution with the greatest precision.

Accepted Answer

A)  a 50 mL Erlenmeyer flask (without volume divisions) 
B)  a 50 mL beaker (with volume divisions every 10 mL) 
C)  a 50 mL graduated cylinder (with volume divisions every 2 mL) 
D)  a 25 mL Erlenmeyer flask (without volume divisions) 
E)  a 25 mL volumetric pipette (with a to-deliver error of 0.01 mL at 25°
C)  
A)  a 50 mL Erlenmeyer flask (without volume divisions) 
B)  a 50 mL beaker (with volume divisions every 10 mL) 
C)  a 50 mL graduated cylinder (with volume divisions every 2 mL) 
D)  a 25 mL Erlenmeyer flask (without volume divisions) 
E)  a 25 mL volumetric pipette (with a to-deliver error of 0.01 mL at 25°
C)

Question 18

Which one of the following is not a chemical reaction?

Accepted Answer

A)  dynamite exploding 
B)  iron rusting 
C)  wood burning 
D)  water turning to steam 
E)  eggs cooking 
A)  dynamite exploding 
B)  iron rusting 
C)  wood burning 
D)  water turning to steam 
E)  eggs cooking

Question 19

Which of the following is a derived SI unit?

Accepted Answer

A)  m 
B)  kg 
C)  cm3 
D)  m3 
E)  lb 
A)  m 
B)  kg 
C)  cm3 
D)  m3 
E)  lb

Question 20

The following measurements of the mass of an aspirin tablet were made by different students in a lab. Which set is the most precise?

Accepted Answer

A)  1.513 g, 1.503 g, 1.522 g 
B)  1.513 g, 1.511 g, 1.450 g 
C)  1.513 g, 1.459 g, 1.533 g 
D)  1.513 g, 1.517 g, 1.512 g 
E)  1.513 g, 1.510 g, 1.523 g 
A)  1.513 g, 1.503 g, 1.522 g 
B)  1.513 g, 1.511 g, 1.450 g 
C)  1.513 g, 1.459 g, 1.533 g 
D)  1.513 g, 1.517 g, 1.512 g 
E)  1.513 g, 1.510 g, 1.523 g

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

Which one of the following statements is not correct?

A solid directly forming a vapor or gas is called ___________.

Which one of the following is not a correct statement?

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

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

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

You measure and find that an object has a mass of 25.15 g and a volume of 9.3 cm3. What would you report as the density of the object?

Which of the following is a chemical property?

A liquid forming a solid is called ___________.

Which one of the following is not classified correctly?

The summit of Mt. Humphreys, the highest point in Arizona, is 12,600 ft. How many meters is this? (1 m = 1.0936 yd, 1 yd = 3 ft exactly)

Distillation may be used to separate components in a mixture based on differences in __________

Which statement A-D about the reaction of methane with oxygen, which is called combustion and is represented by the reaction equation below, is not correct? The reaction products are carbon dioxide and water. CH4 + 2O2 ↔\leftrightarrow↔ CO2 + 2H2O

Which of the following is a homogeneous mixture?

The density of quartz is 165 lb/ft3. A clear crystal with a mass of 26.5 g is found to displace 10.0 cm3 of water. The crystal has a density __________

Indicate which of the following common laboratory devices will deliver 25 mL of a solution with the greatest precision.

Which one of the following is not a chemical reaction?

Which of the following is a derived SI unit?

The following measurements of the mass of an aspirin tablet were made by different students in a lab. Which set is the most precise?

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

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

You measure and find that an object has a mass of 25.15 g and a volume of 9.3 cm³. What would you report as the density of the object?

Which statement A-D about the reaction of methane with oxygen, which is called combustion and is represented by the reaction equation below, is not correct? The reaction products are carbon dioxide and water. CH₄ + 2O₂ $\leftrightarrow$ CO₂ + 2H₂O

The density of quartz is 165 lb/ft³. A clear crystal with a mass of 26.5 g is found to displace 10.0 cm³ of water. The crystal has a density __________