Question 1

The most significant contribution to modern science made by alchemists was

Accepted Answer

A)  their fundamental work in the transmutation of the elements. 
B)  their widespread acceptance of observation and experimentation. 
C)  their systematic method of naming substances. 
D)  their understanding of the nature of chemical reactions. 
E)  their discovery of phlogiston. 
A)  their fundamental work in the transmutation of the elements. 
B)  their widespread acceptance of observation and experimentation. 
C)  their systematic method of naming substances. 
D)  their understanding of the nature of chemical reactions. 
E)  their discovery of phlogiston. B

Question 2

The appropriate number of significant figures in the result of 15.234 * 15.208 is:

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6 D

Question 3

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm * 9.6114 g / 1.4783 cm2 =

Accepted Answer

A)  105.2 g/cm3 
B)  105.2 g/cm2 
C)  105.2 g/cm 
D)  72.13 g/cm2 
E)  72.13 g/cm 
A)  105.2 g/cm3 
B)  105.2 g/cm2 
C)  105.2 g/cm 
D)  72.13 g/cm2 
E)  72.13 g/cm C

Question 4

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Accepted Answer

A)  13.3568 
B)  13.357 
C)  13.36 
D)  13.4 
E)  13 
A)  13.3568 
B)  13.357 
C)  13.36 
D)  13.4 
E)  13

Question 5

Briefly explain the relationship between hypothesis and experiment in the scientific method.

Accepted Answer

A hypothesis should be capable

Question 6

The symbol for the S.I. base unit of mass is:

Accepted Answer

A)  mg 
B)  g 
C)  kg 
D)  metric ton 
E)  lb 
A)  mg 
B)  g 
C)  kg 
D)  metric ton 
E)  lb

Question 7

significant figures. The density is of the order of 1 g/cm3. You have approximately 7 mL of the liquid and only graduated cylinders and balances are available for your use. Which of the following combinations of equipment will allow you to meet but not exceed your goal?

Accepted Answer

A)  graduated cylinder with $\pm$0.1 mL uncertainty; balance with $\pm$0.1 g uncertainty 
B)  graduated cylinder with $\pm$0.01 mL uncertainty; balance with $\pm$0.1 g uncertainty 
C)  graduated cylinder with $\pm$0.01 mL uncertainty; balance with $\pm$0.01 g uncertainty 
D)  graduated cylinder with $\pm$0.001 mL uncertainty; balance with $\pm$0.001 g uncertainty 
E)  graduated cylinder with $\pm$0.1 mL uncertainty; balance with $\pm$0.001 g uncertainty 
A)  graduated cylinder with $\pm$0.1 mL uncertainty; balance with $\pm$0.1 g uncertainty 
B)  graduated cylinder with $\pm$0.01 mL uncertainty; balance with $\pm$0.1 g uncertainty 
C)  graduated cylinder with $\pm$0.01 mL uncertainty; balance with $\pm$0.01 g uncertainty 
D)  graduated cylinder with $\pm$0.001 mL uncertainty; balance with $\pm$0.001 g uncertainty 
E)  graduated cylinder with $\pm$0.1 mL uncertainty; balance with $\pm$0.001 g uncertainty

Question 8

As part of an experiment to determine the density of a new plastic developed in her laboratory, Sara Ann Dippity measures the volume of a solid sample. Her four trials yield volumes of 12.37 cm3, 12.41 cm3, 12.39 cm3, and 12.38 cm3. Measurements of other scientists in the lab give an average volume of 12.49 cm3. Which of the following statements represents the best analysis of the data?

Accepted Answer

A)  Sara's results have low precision and high accuracy. 
B)  Sara's results have high precision and high accuracy. 
C)  Sara's results have greater precision than accuracy. 
D)  Sara's results have greater accuracy than precision. 
E)  Sara has been using a faulty instrument to measure the volume. 
A)  Sara's results have low precision and high accuracy. 
B)  Sara's results have high precision and high accuracy. 
C)  Sara's results have greater precision than accuracy. 
D)  Sara's results have greater accuracy than precision. 
E)  Sara has been using a faulty instrument to measure the volume.

Question 9

Which of the following is an extensive property of oxygen?

Accepted Answer

A)  boiling point 
B)  temperature 
C)  average kinetic energy of molecules 
D)  density 
E)  mass 
A)  boiling point 
B)  temperature 
C)  average kinetic energy of molecules 
D)  density 
E)  mass

Question 10

The ripening of fruit, once picked, is an example of physical change.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following abbreviations of the given SI base unit is incorrect?

Accepted Answer

A)  second: s 
B)  kilogram: kg 
C)  kelvin: K 
D)  mole: m 
E)  ampere: A 
A)  second: s 
B)  kilogram: kg 
C)  kelvin: K 
D)  mole: m 
E)  ampere: A

Question 12

Given that 1 inch = 2.54 cm, 1 cm3 is equal to

Accepted Answer

A)  16.4 in3 
B)  6.45 in3 
C)  0.394 in3 
D)  0.155 in3 
E)  0.0610 in3 
A)  16.4 in3 
B)  6.45 in3 
C)  0.394 in3 
D)  0.155 in3 
E)  0.0610 in3

Question 13

During the swing of a frictionless pendulum, what energy form(s) remain constant?

Accepted Answer

A)  kinetic energy only 
B)  potential energy only 
C)  both kinetic energy and potential energy 
D)  kinetic plus potential energy 
E)  None of these forms remains constant. 
A)  kinetic energy only 
B)  potential energy only 
C)  both kinetic energy and potential energy 
D)  kinetic plus potential energy 
E)  None of these forms remains constant.

Question 14

When applying the scientific method, it is important to avoid any form of hypothesis.

Accepted Answer

A) True 
 B)False

Question 15

The area of a 15-inch pizza is 176.7 in2. Express this area in square centimeters.

Accepted Answer

A)  1140. cm2 
B)  448.8 cm2 
C)  96.8 cm2 
D)  69.57 cm2 
E)  27.39 cm2 
A)  1140. cm2 
B)  448.8 cm2 
C)  96.8 cm2 
D)  69.57 cm2 
E)  27.39 cm2

Question 16

Select the best statement about chemistry before 1800.

Accepted Answer

A)  Alchemy focused on objective experimentation rather than mystical explanations of processes. 
B)  The phlogiston theory laid a valuable theoretical basis for modern chemistry. 
C)  Lavoisier's quantitative work on the role of oxygen in combustion was the beginning of modern chemistry. 
D)  The interpretation of data by alchemists was not biased by their overall view of life. 
E)  Alchemists failed because they did not develop any practical chemical methods. 
A)  Alchemy focused on objective experimentation rather than mystical explanations of processes. 
B)  The phlogiston theory laid a valuable theoretical basis for modern chemistry. 
C)  Lavoisier's quantitative work on the role of oxygen in combustion was the beginning of modern chemistry. 
D)  The interpretation of data by alchemists was not biased by their overall view of life. 
E)  Alchemists failed because they did not develop any practical chemical methods.

Question 17

A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters?

Accepted Answer

A)  3.5 *105 cL 
B)  3.5 * 104 cL 
C)  3.5 cL 
D)  3.5 * 10-4 cL 
E)  3.5 * 10-3 cL 
A)  3.5 *105 cL 
B)  3.5 * 104 cL 
C)  3.5 cL 
D)  3.5 * 10-4 cL 
E)  3.5 * 10-3 cL

Question 18

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Accepted Answer

A)  5.5 *108 kg 
B)  5.5* 105 kg 
C)  5.5 *10-4 kg 
D)  5.5 * 10-6 kg 
E)  5.5 * 10-1 kg 
A)  5.5 *108 kg 
B)  5.5* 105 kg 
C)  5.5 *10-4 kg 
D)  5.5 * 10-6 kg 
E)  5.5 * 10-1 kg

Question 19

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following activities is not a part of good science?

Accepted Answer

A)  proposing a theory 
B)  developing a hypothesis 
C)  making quantitative observations 
D)  designing experiments 
E)  indulging in speculation 
A)  proposing a theory 
B)  developing a hypothesis 
C)  making quantitative observations 
D)  designing experiments 
E)  indulging in speculation

Exam 1: Keys to the Study of Chemistry

The most significant contribution to modern science made by alchemists was

The appropriate number of significant figures in the result of 15.234 * 15.208 is:

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm * 9.6114 g / 1.4783 cm2 =

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Briefly explain the relationship between hypothesis and experiment in the scientific method.

The symbol for the S.I. base unit of mass is:

significant figures. The density is of the order of 1 g/cm3. You have approximately 7 mL of the liquid and only graduated cylinders and balances are available for your use. Which of the following combinations of equipment will allow you to meet but not exceed your goal?

Which of the following is an extensive property of oxygen?

The ripening of fruit, once picked, is an example of physical change.

Which of the following abbreviations of the given SI base unit is incorrect?

Given that 1 inch = 2.54 cm, 1 cm3 is equal to

During the swing of a frictionless pendulum, what energy form(s) remain constant?

When applying the scientific method, it is important to avoid any form of hypothesis.

The area of a 15-inch pizza is 176.7 in2. Express this area in square centimeters.

Select the best statement about chemistry before 1800.

A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters?

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Which of the following activities is not a part of good science?

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm * 9.6114 g / 1.4783 cm² =

significant figures. The density is of the order of 1 g/cm³. You have approximately 7 mL of the liquid and only graduated cylinders and balances are available for your use. Which of the following combinations of equipment will allow you to meet but not exceed your goal?

Given that 1 inch = 2.54 cm, 1 cm³ is equal to

The area of a 15-inch pizza is 176.7 in². Express this area in square centimeters.