Chapter 2 The Amino Acid Glycine C3no2h6

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about calculating

the mass of 3 moles of Li.

• What type of thinking is required? You are being asked to apply the atomic mass of a

compound to calculate the mass of 3 moles.

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about converting from moles to mass? How does it relate to the

question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

55. The amino acid glycine (C3NO2H6) is a(an):

56. Consider the following electronegativity values:

Boron (B) = 1.8

Carbon (C) = 2.5

Chlorine (Cl) = 3.2

Selenium (Se) = 2.6

Which of the following bonds is the most polar?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about the link

between electronegativity and polar bonds.

• What type of thinking is required? You are being asked to analyze the relative

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about polar bonds? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is

most likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did

the process break down or lead you astray? How can you revise your approach to

produce a more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

57. The reaction (H2 + F2 → 2HF) is an example of a redox reaction. In reality, two half

reactions are occurring. The half reaction (H2 → 2H+ + 2e–) is a(n):

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about redox

reactions.

• What type of thinking is required? You are being asked to apply the definition of reactions

that lose an electron.

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about redox reactions? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

o In the half reaction H2 → 2H+ + 2e–, H2 is losing 2 electrons

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

58. The electronic configuration of the noble gas Neon, which has an atomic number of 10,

can be written as follows: 1s22s22p6. What is the electronic configuration of the noble gas

Argon, which has an atomic number of 18?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about the

• What type of thinking is required? You are being asked to apply your knowledge of

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about electron configuration? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

59. You identify an enzyme involved in a cellular reaction. How does the enzyme affect the

reaction equilibrium between reactants and products and the time needed to reach

equilibrium?

60. The electronic configuration of the noble gas Neon, which has an atomic number of 10,

can be written as follows: 1s22s22p6. What is the electronic configuration of the noble gas

Argon, which has an atomic number of 18?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about the

• What type of thinking is required? You are being asked to apply your knowledge of

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about electron configuration? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

61. You recently discovered a new element, and find that this particular element has one

electron its outer energy level. What would you expect will happen to an atom of this element

if placed in water?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about the

formation of ions.

• What type of thinking is required? You are being asked to apply your knowledge of

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about ions? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

62. In the Hershey-Chase experiment, bacterial viruses, called phage, were used to

demonstrate that DNA is the genetic material. The phage that were used for this experiment

consisted of DNA surrounded by a protein coat. Phage will attach to specific types of bacteria

and inject their DNA into the bacterial cell. To scientifically determine whether DNA is the

genetic material, Hershey and Chase made phage in a medium containing radioactive sulfur–

35 (S35). Why was S35 used in this experiment?

63. Why is it necessary to take special safety precautions when using radioactivity?

64. The high heat of vaporization of water helps you to feel cooler when you sweat because

the transition of water from a liquid to a gas requires a ______ of energy to break hydrogen

bonds. The energy is _____ from heat produced by your body, thus helping to lower the

surface temperature of your body.

Chapter 02 – The Nature of Molecules and the Properties of Water

65. Salt is often used to melt ice on roads during the winter because it lowers the

freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl– ions

break away from the salt lattice and become surrounded by water molecules. Why would this

cause ice to melt?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about how salt

• What type of thinking is required? You are being asked to apply your knowledge of the

• What key words does the question contain and what do they mean?

Gather Content

• What do you know about ice? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?

Chapter 02 – The Nature of Molecules and the Properties of Water

66. A chemist adds a chemical to pure water and there is a 100 fold increase in the

concentration of hydrogen ions. What is the best approximation of the new pH value?

Chapter 02 – The Nature of Molecules and the Properties of Water

Clarify Question

• What is the key concept addressed by the question? The question asks about the

• What type of thinking is required? You are being asked to apply your knowledge of pH to

Gather Content

• What do you know about pH? How does it relate to the question?

Consider Possibilities

• What other information is related to the question? Which information is most useful?

Choose Answer

• Given what you now know, what information and/or problem solving approach is most

likely to produce the correct answer?

Reflect on Process

• Did your problem-solving process lead you to the correct answer? If not, where did the

process break down or lead you astray? How can you revise your approach to produce a

more desirable result?