Question 1

Blood has been described as an example of a suspension,and soda has been described as a solution.Define these two categories of mixtures and provide different examples of each type.In the examples you provide,explain the molecular properties (approximate size,polarity)of the substances that mix with water.

Accepted Answer

Common examples of suspensions include m...

Question 2

Fatty acids consist mainly of carbon and hydrogen,and so fatty acids are

Accepted Answer

A)  nonpolar and do not dissolve in water.
B)  nonpolar and dissolve in water.
C)  polar and do not dissolve in water.
D)  polar and dissolve in water.E) None of the above
F) A) and C)

Question 3

When biological molecules engage in condensation,such reactions are _________ reactions.

Accepted Answer

A)  synthesis
B)  hydrolysis
C)  catabolic
D)  amphipathic
E)  ergonomicF) A) and B)
G) A) and C)

Question 4

When a nonpolar molecule is placed in water,it will

Accepted Answer

A)  neither dissolve nor carry electrical current.
B)  dissolve and carry electrical current.
C)  dissociate and carry electrical current.
D)  carry electrical current but not dissolve or dissociate.E) A) and D)
F) A) and C)

Question 5

When two atoms with very different electronegativity share electrons a polar covalent bond is formed.

Accepted Answer

A) True 
 B)False

Question 6

The number of neutrons in an atom can be determined by

Accepted Answer

A)  subtracting the atomic number from the atomic mass.
B)  subtracting the atomic mass from the atomic number.
C)  adding the atomic mass to the atomic number.
D)  adding the number of protons to the number of electrons.
E)  adding the number of protons to the atomic number.F) C) and D)
G) A) and B)

Question 7

An ion is an atom or group of atoms that has

Accepted Answer

A)  a different number of neutrons than most atoms of that element.
B)  lost or gained a proton.
C)  lost or gained an electron.
D)  a biological half-life due to radioactive decay.E) All of the above
F) A) and B)

Question 8

In general,the number of electrons that would fill an atom's outer shell and make it nonreactive is _______.or
or

Accepted Answer

The answer of In general,the number of electrons that would...

Question 9

A molecule with polar and nonpolar parts that only partially dissolves in water is described as __________.

Accepted Answer

The answer of A molecule with polar and nonpolar parts...

Question 10

The two fatty acids within a phospholipid molecule make up its

Accepted Answer

A)  nonpolar heads.
B)  polar heads.
C)  nonpolar tails.
D)  polar tails.E) A) and D)
F) None of the above

Question 11

In some proteins,disulfide covalent bonds form between two _________ amino acids.

Accepted Answer

The answer of In some proteins,disulfide covalent bonds form between...

Question 12

Which of the following is not one of the four most common elements in the body

Accepted Answer

A)  Oxygen
B)  Nitrogen
C)  Hydrogen
D)  Carbon
E)  CalciumF) C) and E)
G) B) and D)

Question 13

When a strong acid is placed in water,it

Accepted Answer

A)  does not dissolve or dissociate.
B)  dissolves but does not dissociate.
C)  dissolves and dissociates.
D)  dissociates,but does not dissolve.E) A) and B)
F) A) and C)

Question 14

When solution concentration is measured in moles of solute per kilogram of solvent,that measurement is known as _________.

Accepted Answer

The answer of When solution concentration is measured in moles...

Question 15

The amount of energy (measured in calories)required to increase the temperature of 1 gram of a substance by 1 degree Celsius is known as ____________.

Accepted Answer

The answer of The amount of energy (measured in calories)required...

Question 16

Compared to a solution with a pH of 7,a solution with a pH of 4 is

Accepted Answer

A)  more acidic and has a 1,000-fold increase in [H+].
B)  more acidic and has a 300-fold increase in [H+].
C)  more basic and has a 1,000-fold increase in [H+].
D)  more basic and has a 300-fold increase in [H+].
E)  more basic and has a 300-fold decrease in [H+].F) A) and E)
G) All of the above

Question 17

Van der Waals forces occur between nonpolar molecules and are weaker attractions than covalent bonds.

Accepted Answer

A) True 
 B)False

Question 18

Molarity is measured in the units of moles solute/L solution.

Accepted Answer

A) True 
 B)False

Question 19

Water has a

Accepted Answer

A)  high specific heat,and this tends to cause large amounts of sweating.
B)  high specific heat,and this tends to keep body temperature relatively constant.
C)  low specific heat,and this tends to lead to variability in body temperature.
D)  low specific heat,and this tends to minimize sweating.
E)  low specific heat,and this tends to result in chills and shivering.F) A) and E)
G) B) and C)

Question 20

The three forms of matter are

Accepted Answer

A)  air,water,and solids.
B)  solids,liquids,and gases.
C)  blood,bone,and air.
D)  vapor,water,and solid.E) B) and C)
F) All of the above

Exam 2: Atoms,Ions,and Molecules

Van der Waals forces occur between nonpolar molecules and are weaker attractions than covalent bonds.

Correct Answer
verified

Compared to a solution with a pH of 7,a solution with a pH of 4 is

Correct Answer
verified

An ion is an atom or group of atoms that has

Correct Answer
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Which of the following is not one of the four most common elements in the body

Correct Answer
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Water has a

Correct Answer
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Molarity is measured in the units of moles solute/L solution.

Correct Answer
verified

The number of neutrons in an atom can be determined by

Correct Answer
verified

In general,the number of electrons that would fill an atom's outer shell and make it nonreactive is _______.or or

Correct Answer
verified

When a strong acid is placed in water,it

Correct Answer
verified

When solution concentration is measured in moles of solute per kilogram of solvent,that measurement is known as _________.

Correct Answer
verified

Fatty acids consist mainly of carbon and hydrogen,and so fatty acids are

Correct Answer
verified

The amount of energy (measured in calories)required to increase the temperature of 1 gram of a substance by 1 degree Celsius is known as ____________.

Correct Answer
verified

In some proteins,disulfide covalent bonds form between two _________ amino acids.

Correct Answer
verified

The two fatty acids within a phospholipid molecule make up its

Correct Answer
verified

The three forms of matter are

Correct Answer
verified

When two atoms with very different electronegativity share electrons a polar covalent bond is formed.

Correct Answer
verified

When biological molecules engage in condensation,such reactions are _________ reactions.

Correct Answer
verified

Correct Answer
verified
Common examples of suspensions include m...
View Answer

A molecule with polar and nonpolar parts that only partially dissolves in water is described as __________.

Correct Answer
verified

When a nonpolar molecule is placed in water,it will

Correct Answer
verified

Exam 2: Atoms,Ions,and Molecules

Van der Waals forces occur between nonpolar molecules and are weaker attractions than covalent bonds.

Correct AnswerverifiedShow Answer

Compared to a solution with a pH of 7,a solution with a pH of 4 is

Correct AnswerverifiedShow Answer

An ion is an atom or group of atoms that has

Correct AnswerverifiedShow Answer

Which of the following is not one of the four most common elements in the body

Correct AnswerverifiedShow Answer

Water has a

Correct AnswerverifiedShow Answer

Molarity is measured in the units of moles solute/L solution.

Correct AnswerverifiedShow Answer

The number of neutrons in an atom can be determined by

Correct AnswerverifiedShow Answer

In general,the number of electrons that would fill an atom's outer shell and make it nonreactive is _______.or or

Correct AnswerverifiedShow Answer

When a strong acid is placed in water,it

Correct AnswerverifiedShow Answer

When solution concentration is measured in moles of solute per kilogram of solvent,that measurement is known as _________.

Correct AnswerverifiedShow Answer

Fatty acids consist mainly of carbon and hydrogen,and so fatty acids are

Correct AnswerverifiedShow Answer

The amount of energy (measured in calories)required to increase the temperature of 1 gram of a substance by 1 degree Celsius is known as ____________.

Correct AnswerverifiedShow Answer

In some proteins,disulfide covalent bonds form between two _________ amino acids.

Correct AnswerverifiedShow Answer

The two fatty acids within a phospholipid molecule make up its

Correct AnswerverifiedShow Answer

The three forms of matter are

Correct AnswerverifiedShow Answer

When two atoms with very different electronegativity share electrons a polar covalent bond is formed.

Correct AnswerverifiedShow Answer

When biological molecules engage in condensation,such reactions are _________ reactions.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedCommon examples of suspensions include m...View AnswerShow Answer

A molecule with polar and nonpolar parts that only partially dissolves in water is described as __________.

Correct AnswerverifiedShow Answer

When a nonpolar molecule is placed in water,it will

Correct AnswerverifiedShow Answer

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Common examples of suspensions include m...
View Answer

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