TESTBANK for Foundations of College Chemistry, 16th Edition Morris Hein
- 2. TESTBANK for Foundatons of College Chemisry, 16h Editon Morris Hein Hello all , We have all wha you need wih bes price Our email : sorees[email protected] Our websie : esbanks-sore.com
- 3. 1 Foundations of College Chemistry, 16e (Hein) Chapter 1 An Introduction to Chemistry 1) Why study chemistry? A) to help inform us about our world B) to be better able to make informed decisions C) to help us learn a technique for identifying and solving problems D) all of these choices Answer: D Diff: 1 Learning Objective: State the definition of chemistry and why the study of chemistry is important. Section Reference: Section 1.1 2) The science of chemistry may involve: A) observation B) hypothesis development C) experimentation D) all of these choices Answer: D Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 3) Which is an observation? A) Atoms consist of protons, neutrons, and electrons. B) All matter is composed of atoms. C) Water is colorless. D) Atoms can form chemical bonds by sharing electrons. Answer: C Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 4) A tentative explanation of certain facts that provides the basis for further experimentation is a(n) ________. A) observation B) hypothesis C) theory D) law Answer: B Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2
- 4. 2 5) A well-established hypothesis is often called a(n) ________. A) observation B) fact C) theory D) law Answer: C Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 6) Which is an observation? A) Water boils at 100 °C. B) The specific heat of water is 4.184 J/g °C. C) Water is a universal solvent. D) All of the above Answer: D Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 7) Which of the following is a pure substance? A) tap water B) trail mix C) sea water D) de-ionized water Answer: D Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 8) Which is a scientific observation? A) Freezing and boiling are called physical changes. B) Water freezes at 0 °C. C) If a substance has a density of 1.00 g/mL it must be water. D) When a substance freezes its molecules lose potential energy. Answer: B Diff: 1 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2
- 5. 3 9) The statement, "An apple a day keeps the doctor away", is best described as a(n) ________. A) observation B) law C) theory D) hypothesis Answer: D Diff: 2 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 10) The statement, "An atom consists of a dense nucleus surrounded by a cloud of electrons", is best described as a(n) ________. A) theory B) law C) hypothesis D) observation Answer: A Diff: 2 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 11) An explanation that accounts for a set of facts is best known as ________. A) experiment B) law C) theory D) hypothesis Answer: D Diff: 2 Learning Objective: Describe the steps involved in the scientific method. Section Reference: Section 1.2 12) Which of the following is not matter? A) sunlight B) copper wire C) alcohol D) dust Answer: A Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3
- 6. 4 13) Which has both a definite shape and definite volume? A) solid B) vapor C) gas D) liquid Answer: A Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 14) Which state of matter consists of particles held together firmly but not rigidly? A) gas B) liquid C) solid D) vapor Answer: B Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 15) Which has a definite volume but no definite shape at room temperature and pressure? A) nitrogen B) aluminum wire C) oxygen D) water Answer: D Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 16) Which is composed of particles with enough kinetic energy to completely overcome the attractive forces between them? A) solid B) gas C) liquid D) crystal Answer: B Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3
- 7. 5 17) Which has neither a definite shape nor a definite volume? A) crystal B) solid C) gas D) liquid Answer: C Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 18) In which phase of matter are the particles farthest apart? A) gas B) solid C) liquid D) crystal Answer: A Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 19) Which phase of matter contains the greatest force of attraction between particles? A) solid B) vapor C) liquid D) gas Answer: A Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 20) Which phase of matter contains the least force of attraction between particles? A) solid B) gas C) crystal D) liquid Answer: B Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3
- 8. 6 21) Which matter contains the greatest force of attraction between particles? A) oxygen gas B) mercury C) sodium metal D) liquid bromine Answer: C Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 22) Which matter contains the least force of attraction between particles? A) oxygen gas B) liquid mercury C) sodium metal D) liquid bromine Answer: A Diff: 1 Learning Objective: Describe the characteristics of matter, including the states of matter. Section Reference: Section 1.3 23) Which is a pure substance? A) element B) compound C) mixture D) both A and B Answer: D Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 24) Which of the following is a homogeneous mixture? A) Coca Cola® B) bowl of pasta and meat sauce C) pure water D) your chemistry professor Answer: A Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4
- 9. 7 25) Which of the following is a pure substance existing as different phases in a heterogeneous system? A) salt dissolved in water B) flour suspended in water C) cork floating in water D) ice floating in water Answer: D Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 26) In which of the following classifications would a solution be placed? A) element B) compound C) homogeneous mixture D) heterogeneous mixture Answer: C Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 27) Which of the following is a homogeneous mixture? A) alcohol B) bromine C) sugar water D) liquid nitrogen Answer: C Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 28) Which of the following is classified as a solution? A) air B) liquid water C) solid iron D) soil Answer: A Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4
- 10. 8 29) Which of the following is a pure substance? A) table salt B) bronze C) air D) soil Answer: A Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 30) Which of the following is a mixture? A) neon B) sugar C) water D) mud Answer: D Diff: 1 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 31) Which of the following is not an element? A) copper wire B) oxygen gas C) mercury D) dry ice Answer: D Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4
- 11. 9 32) Which of the following diagrams represents a homogeneous mixture? A) B) C) D) Answer: A Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4
- 12. 10 33) Which of the following diagrams represents an element? A) B) C) D) Answer: B Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4 34) Your lab instructor gives you a red solid and tells you that it is a pure substance. Which of the following statements is true given this information? A) The solid has a fixed composition by mass. B) The solid is a compound. C) The solid cannot be decomposed into simpler substances. D) The solid cannot be melted. Answer: A Diff: 2 Learning Objective: Distinguish among a pure substance, a homogeneous mixture, and a heterogeneous mixture. Section Reference: Section 1.4