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Chem 109 Ch. 1, 2, 3

Total questions: 178

Worksheet time: 15hrs 50mins

Name
Class
Date
1.

Are all non zero digits significant?

a)

Yes

b)

No

2.

Are zeros between nonzero digits (regardless of if there is a decimal) significant?

a)

Yes

b)

No

3.

Are zeros to the right of the decimal significant?

a)

Yes

b)

No

4.

A decimal placed after one or more zeros indicates the zeros are significant

a)

True

b)

False

5.

Are all digits in the coefficient of a number expressed in scientific notion significant?

a)

Yes

b)

No

6.

In numbers less than zero, are the zeros between the decimal and the nonzero digit significant?

a)

Yes

b)

No

7.

In numbers greater than zero, are the zeros following the last nonzero unit significant?

a)

Yes

b)

No

8.

How do you record sig figs when doing addition or subtraction?

a)

Use the least # of decimal points

b)

Use the least number of sig figs

9.

How do you record sig figs when doing multiplication or division?

a)

Use the least # of decimal points

b)

Use the least number of sig figs

10.

What is the expression for the prefix giga (the base being meters)?

a)

10910^9  

b)

10610^6  

c)

10310^3  

d)

10210^2  

11.

What is the expression for the prefix mega (the base being meters)?

a)

10910^9  

b)

10610^6  

c)

10310^3  

d)

10210^2  

12.

What is the expression for the prefix kilo (the base being meters)?

a)

10910^9  

b)

10610^6  

c)

10310^3  

d)

10210^2  

13.

What is the expression for the prefix hecto (the base being meters)?

a)

10910^9  

b)

10610^6  

c)

10310^3  

d)

10210^2  

14.

What is the expression for the prefix deka (the base being meters)?

a)

10110^1  

b)

10−110^{-1}  

c)

10−210^{-2}  

d)

10−310^{-3}  

15.

What is the expression for the prefix deci (the base being meters)?

a)

10110^1  

b)

10−110^{-1}  

c)

10−210^{-2}  

d)

10−310^{-3}  

16.

What is the expression for the prefix deci (the base being meters)?

a)

10110^1  

b)

10−110^{-1}  

c)

10−210^{-2}  

d)

10−310^{-3}  

17.

What is the expression for the prefix centi (the base being meters)?

a)

10110^1  

b)

10−110^{-1}  

c)

10−210^{-2}  

d)

10−310^{-3}  

18.

What is the expression for the prefix milli (the base being meters)?

a)

10110^1  

b)

10−110^{-1}  

c)

10−210^{-2}  

d)

10−310^{-3}  

19.

What is the expression for the prefix micro (the base being meters)?

a)

10−610^{-6}  

b)

10−910^{-9}  

20.

What is the expression for the prefix nano (the base being meters)?

a)

10−610^{-6}  

b)

10−910^{-9}  

21.

How do you know how many sig figs to include?

a)

Report the digits you know and one digit of uncertainty

b)

It has a uniform composition and distinct properties

c)

A combination of 2 or more substances. Substances still have individual properties and can be separated by physical means.

d)

Same composition without

22.

What is a pure substance?

a)

Report the digits you know and one digit of uncertainty

b)

It has a uniform composition and distinct properties

c)

A combination of 2 or more substances. Substances still have individual properties and can be separated by physical means.

23.

What is a mixture?

a)

Report the digits you know and one digit of uncertainty

b)

It has a uniform composition and distinct properties

c)

A combination of 2 or more substances. Substances still have individual properties and can be separated by physical means.

24.

What is a homogeneous mixture?

a)

Same composition throughout

b)

Variable composition

c)

Cannot be separated into smaller substances by chemical means (One type of atom)

d)

2 or more elements chemically combined in fixed ratios (more than one type of atom)

25.

What is a heterogeneous mixture?

a)

Same composition throughout

b)

Variable composition

c)

Cannot be separated into smaller substances by chemical means (One type of atom)

d)

2 or more elements chemically combined in fixed ratios (more than one type of atom)

26.

What is an element (pure substance)?

a)

Same composition throughout

b)

Variable composition

c)

Cannot be separated into smaller substances by chemical means (One type of atom)

d)

2 or more elements chemically combined in fixed ratios (more than one type of atom)

27.

What is a compound (pure substance)?

a)

Same composition throughout

b)

Variable composition

c)

Cannot be separated into smaller substances by chemical means (One type of atom)

d)

2 or more elements chemically combined in fixed ratios (more than one type of atom)

28.

What are the characteristics of a solid?

a)

Constant volume and shape. Particles vibrate in place

b)

Constant volume with the shape of the bottom of the container. Random particle movement with the container.

c)

Variable shape and volume that fills container. Random particle movement.

29.

What are the characteristics of a liquid?

a)

Constant volume and shape. Particles vibrate in place

b)

Constant volume with the shape of the bottom of the container. Random particle movement with the container.

c)

Variable shape and volume that fills container. Random particle movement.

30.

What are the characteristics of a gas?

a)

Constant volume and shape. Particles vibrate in place

b)

Constant volume with the shape of the bottom of the container. Random particle movement with the container.

c)

Variable shape and volume that fills container. Random particle movement.

31.

What are the characteristics of kinetic energy?

a)

Temperature is a measure of the average kinetic energy of particles of matter.

b)

Heat is kinetic energy transferred from a sample of

matter at a higher temp to a sample of matter at a lower

temp

c)

Stored, gravitational energy

d)

Chemical--from the composition of matter

32.

What are the characteristics of potential energy?

a)

Temperature is a measure of the average kinetic energy of particles of matter.

b)

Heat is kinetic energy transferred from a sample of

matter at a higher temp to a sample of matter at a lower

temp

c)

Stored, gravitational energy

d)

Chemical--from the composition of matter

33.

What happens to a substance when we increase its temperature?

a)

Temperature is related to the average kinetic energy of the

atoms and molecules of a material. So the higher the temperature, the more kinetic energy and movement.

b)

can be measured WITHOUT changing the composition/ identity of the substance

c)

can be measured only when a chemical change occurs

34.

What are physical properties of matter?

a)

Temperature is related to the average kinetic energy of the

atoms and molecules of a material. So the higher the temperature, the more kinetic energy and movement.

b)

can be measured WITHOUT changing the composition/ identity of the substance

c)

can be measured only when a chemical change occurs

35.

What are chemical properties of matter?

a)

Temperature is related to the average kinetic energy of the

atoms and molecules of a material. So the higher the temperature, the more kinetic energy and movement.

b)

can be measured WITHOUT changing the composition/ identity of the substance

c)

can be measured only when a chemical change occurs

36.

What are examples of physical properties?

a)

Color, melting point, boiling point, density, etc

b)

Flammability, acidity, basicity, reactivity with various other chemicals

37.

What are examples of chemical properties?

a)

Color, melting point, boiling point, density, etc

b)

Flammability, acidity, basicity, reactivity with various other chemicals

38.

What is a chemical change?

a)

Involves formation of one or more new substances that have different physical and chemical properties than original

b)

chemical reactions

c)

all possible chemical changes for a substance

d)

A change in the physical properties of a substance without a change in chemical composition

39.

What is a physical change?

a)

Involves formation of one or more new substances that have different physical and chemical properties than original

b)

chemical reactions

c)

all possible chemical changes for a substance

d)

A change in the physical properties of a substance without a change in chemical composition

40.

Chemical changes=

a)

Involves formation of one or more new substances that have different physical and chemical properties than original

b)

chemical reactions

c)

all possible chemical changes for a substance

d)

A change in the physical properties of a substance without a change in chemical composition

41.

Chemical properties=

a)

Involves formation of one or more new substances that have different physical and chemical properties than original

b)

chemical reactions

c)

all possible chemical changes for a substance

d)

A change in the physical properties of a substance without a change in chemical composition

42.

What is an exothermic reaction? (think exo EXIT)

a)

Gives off heat/energy ex: condensing or freezing

b)

Takes in heat/energy ex: melting or boiling

43.

What is an endothermic reaction?

a)

Gives off heat/energy ex: condensing or freezing

b)

Takes in heat/energy ex: melting or boiling

44.

Electrons increase in rows, so as we go down the periodic table, the atomic radius...

a)

Increases

b)

Decreases

45.

As we go across the periodic table, the atomic radius...

a)

Increases

b)

Decreases

46.

What are atoms?

a)

Subatomic particles that constitute the fundamental building blocks of ordinary matter

b)

found in the nucleus with a positive charge

c)

found in the nucleus with no charge

d)

found outside the nucleus with a negative charge

47.

What are protons?

a)

Subatomic particles that constitute the fundamental building blocks of ordinary matter

b)

found in the nucleus with a positive charge

c)

found in the nucleus with no charge

d)

found outside the nucleus with a negative charge

48.

What are neutrons?

a)

Subatomic particles that constitute the fundamental building blocks of ordinary matter

b)

found in the nucleus with a positive charge

c)

found in the nucleus with no charge

d)

found outside the nucleus with a negative charge

49.

What are electrons?

a)

Subatomic particles that constitute the fundamental building blocks of ordinary matter

b)

found in the nucleus with a positive charge

c)

found in the nucleus with no charge

d)

found outside the nucleus with a negative charge

50.

What are the atomic mass units (AMU)?

a)

Used to express the relative mass of atoms and subatomic particles

b)

1 Dalton (Da) = the mass of 1 proton or the mass of 1 neutron (same-ish mass)

c)

Charge

d)

Mass

51.

1 amu=

a)

Used to express the relative mass of atoms and subatomic particles

b)

1 Dalton (Da) = the mass of 1 proton or the mass of 1 neutron (same-ish mass)

c)

Charge

d)

Mass

52.

What is only affected by protons and electrons?

a)

Charge

b)

Mass

53.

What is only affected by the number of protons?

a)

Charge

b)

Mass

54.

What are isotopes?

a)

Atoms with the same # of protons but a different # of neutrons (Same element, different mass)

b)

Atomic mass

c)

Atomic number

55.

What is A?

a)

Atoms with the same # of protons but a different # of neutrons (Same element, different mass)

b)

Atomic mass

c)

Atomic number

56.

What is Z?

a)

Atoms with the same # of protons but a different # of neutrons (Same element, different mass)

b)

Atomic mass

c)

Atomic number

57.

What is A or atomic mass?

a)

total number of nucleons (protons + neutrons) in the nucleus

b)

the number of protons in the nucleus; determines the identity of the element

58.

What is Z or atomic number?

a)

total number of nucleons (protons + neutrons) in the nucleus

b)

the number of protons in the nucleus; determines the identity of the element

59.

What is the average atomic mass based on?

a)

Naturally occurring isotopes

b)

Relative occurrence of each isotope

60.

Who and what created the periodic table?

a)

Mendeleev in 1869

b)

When elements are arranged in order of increasing atomic number, certain sets of properties recur periodically

c)

# of protons and # of electrons

61.

How would you complete this isotope diagram?

a)

1. Look at the periodic table to find the atomic number or number of protons

b)

2. Put the # of protons in the nucleus and the same number as electrons in the "cloud space"

c)

3. Take the atomic mass #-the # of protons to get the # of neutrons

62.

What is periodic law?

a)

Mendeleev in 1869

b)

When elements are arranged in order of increasing atomic number, certain sets of properties recur periodically

c)

# of protons and # of electrons

63.

Chemical properties are determined primarily by

a)

Mendeleev in 1869

b)

When elements are arranged in order of increasing atomic number, certain sets of properties recur periodically

c)

the # of protons and the # of electrons

64.

What is the blue portion called?

a)

Metals

b)

Metalloids

c)

Nonmetals

65.

What is the green portion called?

a)

Metals

b)

Metalloids

c)

Nonmetals

66.

What is the yellow portion called?

a)

Metals

b)

Metalloids

c)

Nonmetals

67.

What are nucleons?

a)

The # of protons + the # of neutrons or the atomic mass

b)

in the nucleus

c)

a release of subatomic particles and/or energy

d)

unstable atoms

68.

Where do nuclear changes occur?

a)

The # of protons + the # of neutrons or the atomic mass

b)

in the nucleus

c)

a release of subatomic particles and/or energy

d)

unstable atoms

69.

What is radiation?

a)

The # of protons + the # of neutrons or the atomic mass

b)

in the nucleus

c)

a release of subatomic particles and/or energy

d)

unstable atoms

70.

What makes isotopes undergo a nuclear change?

a)

The # of protons + the # of neutrons or the atomic mass

b)

in the nucleus

c)

a release of subatomic particles and/or energy

d)

unstable atoms

71.

What are the characteristics of alpha particles?

a)

Mirrors the nucleus of a helium-4 atom but is an alpha particle instead, so Alpha replaces where the He would be

b)

The charge is 2+

c)

The mass number is 4

d)

Change of the reactant atom: proton number goes down by 2, mass number down by 4

72.

What is an example of alpha decay?

a)
b)
c)
d)
73.

What is an example of beta decay?

a)
b)
c)
d)
74.

What is an example of positron decay?

a)
b)
c)
d)
75.

What is an example of gamma radiation?

a)
b)
c)
d)
76.

What are the characteristics of beta particles?

a)

Identical to the charge and mass of an electron

b)

The charge is -1

c)

The mass number is 0

d)

The reactant atom proton number goes up by 1

77.

What are the characteristics of a positron?

a)

Same mass as β particle, but opposite charge

b)

The charge is +1

c)

The mass number is 0

d)

The reactant atom proton number goes down by 1

78.

What are the characteristics of gamma rays?

a)

The charge is 0

b)

The mass number is 0

c)

The reactant atom will not change

79.

What is the 'octet rule'?

a)

When at atom loses or gains electron to become an ion, they do so to get to an “octet” (8) of electrons in their outer most energy level

b)

Noble gases

c)

1872

80.

What elements already fulfill the octet rule?

a)

When at atom loses or gains electron to become an ion, they do so to get to an “octet” (8) of electrons in their outer most energy level

b)

Noble gases

c)

1872

81.

When did Mendeleev organize the elements by atomic mass on the periodic table?

a)

When at atom loses or gains electron to become an ion, they do so to get to an “octet” (8) of electrons in their outer most energy level

b)

Noble gases

c)

1872

82.

How do periods move?

a)

Top to bottom

b)

Left to right

83.

How do groups move?

a)

Top to bottom

b)

Left to right

84.

What are metals?

a)

Shiny solids; conduct heat and electricity; are malleable and ductile

b)

Solids, liquids and gases; nonconductors; solids are brittle

c)

metals; called f-block – separated due to f orbitals and similar reactivity

d)

Shiny solids (like metals); brittle (like nonmetals); semiconductors

85.

What are non metals?

a)

Shiny solids; conduct heat and electricity; are malleable and ductile

b)

Solids, liquids and gases; nonconductors; solids are brittle

c)

metals; called f-block – separated due to f orbitals and similar reactivity

d)

Shiny solids (like metals); brittle (like nonmetals); semiconductors

86.

What are Lanthanides/Actinides?

a)

Shiny solids; conduct heat and electricity; are malleable and ductile

b)

Solids, liquids and gases; nonconductors; solids are brittle

c)

metals; called f-block – separated due to f orbitals and similar reactivity

d)

Shiny solids (like metals); brittle (like nonmetals); semiconductors

87.

What are Metalloids?

a)

Shiny solids; conduct heat and electricity; are malleable and ductile

b)

Solids, liquids and gases; nonconductors; solids are brittle

c)

metals; called f-block – separated due to f orbitals and similar reactivity

d)

Shiny solids (like metals); brittle (like nonmetals); semiconductors

88.

What determines an atoms reactivity?

a)

The electrons

b)

As a “cloud” but some electrons stay closer to the nucleus and some are farther

c)

the “address” of the e-

d)

the n level

89.

How are electrons positioned around the nucleus?

a)

The electrons

b)

As a “cloud” but some electrons stay closer to the nucleus and some are farther

c)

the “address” of the e-

d)

the n level

90.

What are orbitals?

a)

The electrons

b)

As a “cloud” but some electrons stay closer to the nucleus and some are farther

c)

the “address” of the e-

d)

the n level

91.

?What helps you determine how far electrons are from the nucleus?

a)

The electrons

b)

As a “cloud” but some electrons stay closer to the nucleus and some are farther

c)

the “address” of the e-

d)

the n level

92.

What is the n level?

a)

Describes the energy level or “shell”

b)

the distance from the nucleus

c)

the periods (period 1 is n=1)

93.

As n increases, what also increases?

a)

Describes the energy level or “shell”

b)

the distance from the nucleus

c)

the periods (period 1 is n=1)

94.

What do you use to determine the n level?

a)

Describes the energy level or “shell”

b)

the distance from the nucleus

c)

the periods (period 1 is n=1)

95.

How many electrons can each orbital have?

a)

2

b)

s

c)

f

d)

The inner shell electron screens the outer shell electron

96.

What is the closest sublevel (s,p,d,f)?

a)

2

b)

s

c)

f

d)

The inner shell electron screens the outer shell electron

97.

What is the farthest sublevel (s,p,d,f)?

a)

2

b)

s

c)

f

d)

The inner shell electron screens the outer shell electron

98.

What is electron screening?

a)

2

b)

s

c)

f

d)

The inner shell electron screens the outer shell electron

99.

How many orbitals does s have?

a)

one (2 e- max)

b)

three (6 e- max)

c)

five (10 e- max)

d)

seven (14 e- max)

100.

How many orbitals does p have?

a)

one (2 e- max)

b)

three (6 e- max)

c)

five (10 e- max)

d)

seven (14 e- max)

101.

How many orbitals does d have?

a)

one (2 e- max)

b)

three (6 e- max)

c)

five (10 e- max)

d)

seven (14 e- max)

102.

How many orbitals does f have?

a)

one (2 e- max)

b)

three (6 e- max)

c)

five (10 e- max)

d)

seven (14 e- max)

103.

What is the s orbital shape?

a)
b)
c)
d)
104.

What is the p orbital shape?

a)
b)
c)
d)
105.

What is the d orbital shape?

a)
b)
c)
d)
106.

What is the f orbital shape?

a)
b)
c)
d)
107.

What are the steps for determinings how energy fills the sublevels?

a)

1. Write the max number of electrons after the letter orbital ( 1s21s^2  )

b)

2. Divide by the n level (1s21)\left(\frac{1s^2}{1}\right)  

c)

3. Continue for each n level that correlates to the period (2s22 or 3p6 4s24)\left(\frac{2s^2}{2}\ or\ \frac{3p^6\ 4s^2}{4}\right)  

108.

What are valence electrons?

a)

electrons in highest energy level of an atom

b)

repeating patterns found in the periodic table

c)

physical and chemical properties

d)

electron arrangements

109.

What is periodicity?

a)

electrons in highest energy level of an atom

b)

repeating patterns found in the periodic table

c)

physical and chemical properties

d)

electron arrangements

110.

What are examples of periodicity?

a)

physical and chemical properties

b)

electron arrangements

111.

What do valence electrons correlate to?

a)

Group number (as group number increase, they increase)

b)

Lewis dot structures

c)

Principal quantum number (n)

d)

Effective nuclear charge (Z* or Zeff)

112.

What diagram displays valence electrons?

a)

Group number (as group number increase, they increase)

b)

Lewis dot structures

c)

Principal quantum number (n)

d)

Effective nuclear charge (Z* or Zeff)

113.

All periodic trends can be described by what two parameters?

a)

Principal quantum number (n)

b)

Effective nuclear charge (Z* or ZeffZ_{eff}  )

114.

What is Van der Waal’s method to determining atomic radius?

a)

How close can we get them without bonding? and take ½ distance between nuclei = r

b)

They are bonded and take ½ distance between nuclei = r

115.

What is the Covalent method to determining atomic radius?

a)

How close can we get them without bonding? and take ½ distance between nuclei = r

b)

They are bonded and take ½ distance between nuclei = r

116.

As you go across a period, electrons are added to the same energy level. At the same time, protons are being added to the nucleus. The concentration of more protons in the nucleus creates a "higher effective nuclear charge." In other words, there is a stronger force of attraction pulling the electrons closer to the nucleus resulting in a smaller atomic radius.

a)

True

b)

False

117.

The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase.

a)

True

b)

False

118.

Chemical formulas show the composition of the chemical. What does composition include?

a)

What is present (what atoms/ions)

b)

How many atoms/ions of each are present

119.

What is bonding?

a)

when electrons from different atoms interact

b)

to become more stable and like an octet or noble gas configuration

c)

valence electrons

d)

core electrons

120.

Why do atoms bond?

a)

when electrons from different atoms interact

b)

to become more stable and like an octet or noble gas configuration

c)

valence electrons

d)

core electrons

121.

What electrons bond?

a)

when electrons from different atoms interact

b)

to become more stable and like an octet or noble gas configuration

c)

valence electrons

d)

core electrons

122.

What electrons do NOT bond?

a)

when electrons from different atoms interact

b)

to become more stable and like an octet or noble gas configuration

c)

valence electrons

d)

core electrons

123.

What is an ion?

a)

atom (or group of atoms) with a net positive/negative charge

b)

ion with a positive charge

c)

ion with a negative charge

124.

What is a cation?

a)

atom (or group of atoms) with a net positive/negative charge

b)

ion with a positive charge

c)

ion with a negative charge

125.

What is an anion?

a)

atom (or group of atoms) with a net positive/negative charge

b)

ion with a positive charge

c)

ion with a negative charge

126.

If a neutral atom loses one or more electrons it becomes a

a)

cation

b)

anion

c)

ionic

d)

covalent

127.

If a neutral atom gains one or more electrons it becomes a

a)

cation

b)

anion

c)

ionic

d)

covalent

128.

What bonds share an electron?

a)

cation

b)

anion

c)

ionic

d)

covalent

129.

What bonds take away an electron?

a)

cation

b)

anion

c)

ionic

d)

covalent

130.

How do we predict the ion charge of a main group metal cations?

a)

Charge of cation is equal in magnitude to Group #

b)

Charge of anion is equal to (Group # - 8

131.

How do we predict the ion charge of a nonmetal anion?

a)

Charge of cation is equal in magnitude to Group #

b)

Charge of anion is equal to (Group # - 8

132.

What are ionic compounds? What are their characteristics?

a)

compounds formed when cations and anions join together (held together by equal but opposite charges)

b)

No discrete molecules

c)

Occur in repeating formula units

d)

Chemical formula represents ratio of cation to anion

133.

Pure substances can be?

a)

Elements or compounds

b)

Atomic or molecular

c)

Molecular or ionic

134.

Elements can be?

a)

Elements or compounds

b)

Atomic or molecular

c)

Molecular or ionic

135.

Compounds can be?

a)

Elements or compounds

b)

Atomic or molecular

c)

Molecular or ionic

136.

Ionic compounds can predict chemical formula if we know ion charges (CaBr2 --> One calcium atom for every two bromine atoms)

a)

True

b)

False

137.

How do you name ionic compounds?

a)

Name cation 1st (usually metal) and then anion 2nd with ide

b)

Name cation 1st (metal or NH4 1+) and then anion 2nd.... but Polyatomic keeps its name and the nonmetal gets -ide

c)

can form more than one type of ion

d)

Name cation 1st (metal) then the charge of the cation in () and using roman numerals. Then the base name of the anion with ide.

138.

How do you name polyatomic compounds?

a)

Name cation 1st (usually metal) and then anion 2nd with ide

b)

Name cation 1st (metal or NH4 1+) and then anion 2nd.... but Polyatomic keeps its name and the nonmetal gets -ide

c)

can form more than one type of ion

d)

Name cation 1st (metal) then the charge of the cation in () and using roman numerals. Then the base name of the anion with ide.

139.

What are transition metals?

a)

Name cation 1st (usually metal) and then anion 2nd with ide

b)

Name cation 1st (metal or NH4 1+) and then anion 2nd.... but Polyatomic keeps its name and the nonmetal gets -ide

c)

can form more than one type of ion

d)

Name cation 1st (metal) then the charge of the cation in () and using roman numerals. Then the base name of the anion with ide.

140.

How do you name transition metals?

a)

Name cation 1st (usually metal) and then anion 2nd with ide

b)

Name cation 1st (metal or NH4 1+) and then anion 2nd.... but Polyatomic keeps its name and the nonmetal gets -ide

c)

can form more than one type of ion

d)

Name cation 1st (metal) then the charge of the cation in () and using roman numerals. Then the base name of the anion with ide.

141.

What are molecular compounds (ex: F2)?

a)

compounds held together by only covalent bonds

b)

Name 1st element with the prefix and then the 2nd element with the prefix and end in ide

142.

How do you name molecular compounds?

a)

compounds held together by only covalent bonds

b)

Name 1st element (furthest left or lowest) with the prefix and then the 2nd element with the prefix and end in ide

143.

How do you write hydronium ion?

a)

H3O+H_3O^+  

b)

OH−OH^-  

c)

CO3  2−CO_3^{\ \ 2}-  

d)

NO3−NO_3^-  

144.

How do you write hydroxide ion?

a)

H3O+H_3O^+  

b)

OH−OH^-  

c)

CO3  2−CO_3^{\ \ 2}-  

d)

NO3−NO_3^-  

145.

How do you write carbonate ion?

a)

H3O+H_3O^+  

b)

OH−OH^-  

c)

CO3  2−CO_3^{\ \ 2}-  

d)

NO3−NO_3^-  

146.

How do you write nitrate ion?

a)

H3O+H_3O^+  

b)

OH−OH^-  

c)

CO3  2−CO_3^{\ \ 2}-  

d)

NO3−NO_3^-  

147.

How do you write sulfate ion?

a)

SO4  2−SO_{4\ }^{\ 2}-  

b)

NH4+NH_4^+  

c)

PO43−PO_4^3-  

148.

How do you write ammonium ion?

a)

SO4  2−SO_{4\ }^{\ 2}-  

b)

NH4+NH_4^+  

c)

PO43−PO_4^3-  

149.

How do you write phosphate ion?

a)

SO4  2−SO_{4\ }^{\ 2}-  

b)

NH4+NH_4^+  

c)

PO43−PO_4^3-  

150.

How do you calculate bonds needed for a lewis dot structure?

a)

v e- needed-v e- present/2

b)

Distribute remaining e- to surrounding atoms to give each an octet including lone pairs

c)

Check, # Bonds, #e-, formal charge • If there are not enough e- to complete octets, remove a lone pair from one surrounding atom and try a double bond, then triple bond.

151.

After calculating bonds for a lewis dot structure what is the next step?

a)

v e- needed-v e- present/2

b)

Distribute remaining e- to surrounding atoms to give each an octet including lone pairs

c)

Check, # Bonds, #e-, formal charge • If there are not enough e- to complete octets, remove a lone pair from one surrounding atom and try a double bond, then triple bond.

152.

After distributing remaining e- for a lewis dot structure what is the next step?

a)

v e- needed-v e- present/2

b)

Distribute remaining e- to surrounding atoms to give each an octet including lone pairs

c)

Check, # Bonds, #e-, formal charge • If there are not enough e- to complete octets, remove a lone pair from one surrounding atom and try a double bond, then triple bond.

153.

What is activation energy? EAE_A  

a)

Amount of energy that must be attained by reactants for a chemical reaction to occur

b)

Spark ignites methane (gas burner)

c)

arrow from the reactants to the highest

d)

the number of reactants that are converted to products in a given time

154.

What is an example of activation energy? EAE_A  

a)

Amount of energy that must be attained by reactants for a chemical reaction to occur

b)

Spark ignites methane (gas burner)

c)

arrow from the reactants to the highest

d)

the number of reactants that are converted to products in a given time

155.

How is activation energy drawn on the diagram?

a)

Amount of energy that must be attained by reactants for a chemical reaction to occur

b)

Spark ignites methane (gas burner)

c)

arrow from the reactants to the highest

d)

the number of reactants that are converted to products in a given time

156.

What is the reaction rate?

a)

Amount of energy that must be attained by reactants for a chemical reaction to occur

b)

Spark ignites methane (gas burner)

c)

arrow from the reactants to the highest

d)

the number of reactants that are converted to products in a given time

157.

What is an example of slow reaction rates?

a)

Rust

b)

Hydrogen explosion

c)

slower

d)

faster

158.

What is an example of fast reaction rates?

a)

Rust

b)

Hydrogen explosion

c)

slower

d)

faster

159.

The larger the hill, the ______ the rate

a)

Rust

b)

Hydrogen explosion

c)

slower

d)

faster

160.

The smaller the hill, the ______ the rate

a)

Rust

b)

Hydrogen explosion

c)

slower

d)

faster

161.

What factors affect activation energy?

a)

Concentration

b)

Temperature (heat)

c)

Presence of a catalyst

162.

The steeper the concentration, the ______ the reaction

a)

faster

b)

slower

c)

True

d)

False

163.

The less steep the concentration, the ______ the reaction

a)

faster

b)

slower

c)

True

d)

False

164.

More reactants = more collisions

a)

True

b)

False

165.

How does heat affect the rate of the reaction?

a)

Heat energy causes particles to move faster, thus have higher kinetic energy

b)

Greater kinetic energy leads to more collisions with more energy.

c)

For every 10 °C increase, a reaction rate roughly doubles.

d)

Lower temperatures = slower reaction

166.

How do catalysts affect the rate of the reaction?

a)

They increase the rate of the reaction by decreasing the activation energy

b)

Provide alternate pathway between reactants and products

c)

Are indicated by name over the reaction arrow

167.

How do you find catalysts on the diagram?

a)

They increase the rate of the reaction by decreasing the activation energy

b)

Provide alternate pathway between reactants and products

c)

Are indicated by name over the reaction arrow

168.

What do catalysts provide?

a)

They increase the rate of the reaction by decreasing the activation energy

b)

Provide alternate pathway between reactants and products

c)

Are indicated by name over the reaction arrow

169.

What are the characteristics of catalysts?

a)

Do NOT affect heat of reaction, ΔHrxn.

b)

Are NOT reactants, are not consumed by the reaction, but can be used over and over.

c)

Often provide a surface for reactants to bind in proper orientation

170.

What are enzymes? What are their characteristics? How do they affect the rate of the reaction?

a)

Biological catalysts that are large 3-D biomolecules

b)

Most are proteins composed of many C, H, N, O, and S plus some Zn or Mg.

c)

Greatly increase reaction rates (105 to 1017 times)

171.

What is the forward reaction?

a)

converts reactants into products.

b)

converts products into reactants

c)

When the rate of forward reaction equals the rate of the reverse reaction

d)

the concentrations of reactants and products are constant

172.

What is a reverse reaction?

a)

converts reactants into products.

b)

converts products into reactants

c)

When the rate of forward reaction equals the rate of the reverse reaction

d)

the concentrations of reactants and products are constant

173.

What is a chemical equilibrium?

a)

converts reactants into products.

b)

converts products into reactants

c)

When the rate of forward reaction equals the rate of the reverse reaction

d)

the concentrations of reactants and products are constant

174.

How do you know if there is a chemical equilibrium?

a)

converts reactants into products.

b)

converts products into reactants

c)

When the rate of forward reaction equals the rate of the reverse reaction

d)

the concentrations of reactants and products are constant

175.

What energy allows chemical equilibrium to occur?

a)

the lowest energy for the reaction mixture

b)

Reaction favors products

c)

Reaction favors reactants

d)

Size

176.

product concentrations > reactant concentrations

which is favored?

a)

the lowest energy for the reaction mixture

b)

Reaction favors products

c)

Reaction favors reactants

d)

Size

177.

product concentrations < reactant concentrations

which is favored?

a)

the lowest energy for the reaction mixture

b)

Reaction favors products

c)

Reaction favors reactants

d)

Size

178.

What indicates whether e indicates whether reactants or products are favored at

equilibrium?

a)

the lowest energy for the reaction mixture

b)

Reaction favors products

c)

Reaction favors reactants

d)

Size