Phys Scie II- Final Exam Review (Exam 4, Exam 1, & Exam 2)

Questão 1 de 150

1

The first minerals to crystallize are those with the

Selecione uma das seguintes:

lower melting point
higher melting point

Explicação

Questão 2 de 150

1

The last minerals to crystallize from a cooling magma have a

Selecione uma das seguintes:

low melting point and a high silica content
low melting point and a low silica content
high melting point and a low silica content
high melting point and a high silica content

Explicação

Questão 3 de 150

1

The protective shells that many sea organisms grow are not minerals because they

Selecione uma das seguintes:

become compacted.
are organic.
are made of ooze.
are not calcium carbonate.

Explicação

Questão 4 de 150

1

The silicates are the largest mineral group because silicon and oxygen are

Selecione uma das seguintes:

found in the common mineral quartz.
the two most abundant elements in Earth's crust.
the hardest elements on Earth's surface.

Explicação

Questão 5 de 150

1

Minerals are formed by the process of

Selecione uma das seguintes:

magma differentiation.
crystallization.
partial melting.
silica enrichment.

Explicação

Questão 6 de 150

1

The first minerals to crystallize from a cooling magma have a

Selecione uma das seguintes:

low melting point and a high silica content.
high melting point and a low silica content.
high melting point and a high silica content.
low melting point and a low silica content.

Explicação

Questão 7 de 150

1

Minerals are composed of

Selecione uma das seguintes:

homogenous solids.
inorganic solids.
silicon compounds.
common types of rocks.

Explicação

Questão 8 de 150

1

The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with

Selecione uma das seguintes:

lowest melting point and lowest silica content.
highest silica content and highest melting point.
lowest melting point and highest silica content.
lowest silica content and highest melting point.

Explicação

Questão 9 de 150

1

The most common mineral in Earth's crust is , and the second most common mineral is .

Selecione uma das seguintes:

olivine, feldspar
silicate, carbonate
quartz, feldspar
feldspar, quartz

Explicação

Questão 10 de 150

1

The last minerals to crystallize from a cooling magma have the

Selecione uma das seguintes:

highest melting point and the highest percentage of silica.
lowest melting point and the lowest percentage of silica.
highest melting point and the lowest percentage of silica.
lowest melting point and the highest percentage of silica.

Explicação

Questão 11 de 150

1

Silica has a relatively

Selecione uma das seguintes:

high melting point.
low melting point.

Explicação

Questão 12 de 150

1

The Mohorovicic discontinuity occurs because of a

Selecione uma das seguintes:

density change in rocks of the same composition on both sides of the boundary.
change in temperature with depth.
change in the composition of rocks on both sides of the boundary.
shift in the density of minerals with the same composition.

Explicação

Questão 13 de 150

1

In comparison to P-waves, S-waves

Selecione uma das seguintes:

can travel through all mediums–solid granite, magma, water and/or air.
can travel only through solids—not in fluids.
compress and expand the rock as they move through it.
are fast and the first to register on a seismograph.

Explicação

Questão 14 de 150

1

The Earth's magnetic field is attributed to the

Selecione uma das seguintes:

flow of molten fluid in Earth's outer core.
flow of molten liquid in Earth's inner core.
movement of lithospheric plates in the outer mantle.
movement of lithospheric plates at Earth's surface.

Explicação

Questão 15 de 150

1

The asthenosphere is part of the

Selecione uma das seguintes:

lithosphere.
crust.
mantle.
outer core.

Explicação

Questão 16 de 150

1

The speed of a seismic wave depends on

Selecione uma das seguintes:

its frequency.
the type of material it travels through.
its amplitude.
how far it has to travel.

Explicação

Questão 17 de 150

1

Which seismic waves produce a wave shadow?

Selecione uma das seguintes:

Love waves.
S-waves.
P- and S- waves
P-waves.

Explicação

Questão 18 de 150

1

The Mohorovicic discontinuity marks the change in rock density elasticity between the

Selecione uma das seguintes:

inner and outer core.
asthenosphere and lithosphere.
core and the mantle.
mantle and the crustal surface.

Explicação

Questão 19 de 150

1

The Earth's layer with plastic-like behavior is the

Selecione uma das seguintes:

mantle.
inner core.
crust.
outer core.

Explicação

Questão 20 de 150

1

The lithosphere includes

Selecione uma das seguintes:

continental and oceanic crust and the upper part of the mantle.
continental and oceanic crust.
the crust and the upper part of the mantle.
part of the mantle and the crust.

Explicação

Questão 21 de 150

1

The thickness of Earth's crust

Selecione uma das seguintes:

varies from 10 km under the oceans to 60 km under the continents.
on average is about 10 km.
varies from 10 km under the continents to 60 km under the oceans.
on average is about 60 km.

Explicação

Questão 22 de 150

1

P-waves travel faster through the inner core than the outer core because the inner core is

Selecione uma das seguintes:

solid.
the same as the outer core.
hotter than the outer core.
rock.

Explicação

Questão 23 de 150

1

The outer core is

Selecione uma das seguintes:

liquid.
the source for volcanoes.
plastic.
rock.

Explicação

Questão 24 de 150

1

Seismic waves are classified as body waves and surface waves. An example of a body wave is a

Selecione uma das seguintes:

Rayleigh wave.
Tertiary wave (T-wave).
Love wave.
Primary wave (P-wave).

Explicação

Questão 25 de 150

1

In comparison to S-waves, P-waves

Selecione uma das seguintes:

are the second seismic wave to register on a seismograph.
can travel only through solids, not through fluids.
can travel through solid granite, magma, water and/or air.
vibrate the particles of their medium up and down and side-to-side.

Explicação

Questão 26 de 150

1

The outer core

Selecione uma das seguintes:

transmits S-waves.
flows fast enough to power Earth's magnetic field.
has a plasticlike flow.
is solid as a rock.

Explicação

Questão 27 de 150

1

Because S-waves do not travel through Earth's outer core, scientists inferred that the outer core is

Selecione uma das seguintes:

impenetrable.
molten liquid.
very dense.
solid.

Explicação

Questão 28 de 150

1

Continental crust is

Selecione uma das seguintes:

more dense than oceanic crust.
thinner than oceanic crust.
thinner and more dense than oceanic crust.
less dense than oceanic crust.

Explicação

Questão 29 de 150

1

Water able to be contained in the subsurface depends on

Selecione uma das seguintes:

permeability.
chemical composition.
porosity.
none of these

Explicação

Questão 30 de 150

1

The greater the hydraulic gradient the

Selecione uma das seguintes:

greater the porosity.
less the permeability.
faster the flow.
slower the flow.

Explicação

Questão 31 de 150

1

A rock's permeability can be described by its

Selecione uma das seguintes:

water-transmitting capability, or hydraulic conductivity.
water-holding capacity.
depth of burial.
density.

Explicação

Questão 32 de 150

1

When subsurface ground material is completely saturated with water, we call it

Selecione uma das seguintes:

the saturated zone.
the water table.
groundwater.
groundwater in the saturated zone.

Explicação

Questão 33 de 150

1

Water is vital to life on our planet. Most of Earth's water supply is in the

Selecione uma das seguintes:

ground.
oceans.
rivers, lakes, and streams.
ice caps.

Explicação

Questão 34 de 150

1

The flow of groundwater depends on

Selecione uma das seguintes:

porosity and hydraulic gradient.
permeability and gravity.
porosity only.
permeability and porosity.

Explicação

Questão 35 de 150

1

A rock with a high porosity will most likely have a

Selecione uma das seguintes:

low density.
large proportion of open pore spaces.
low permeability.
high permeability.

Explicação

Questão 36 de 150

1

The capacity a material has for transmitting fluids is known as its

Selecione uma das seguintes:

impermeability.
permeability.
porosity.
competence.

Explicação

Questão 37 de 150

1

A rock with very low porosity will most often have a

Selecione uma das seguintes:

low permeability.
large proportion of open spaces.
high permeability.
very high density.

Explicação

Questão 38 de 150

1

A sub-surface region that holds and transmits water is called a/an

Selecione uma das seguintes:

aquiclude.
hydrometer.
water table.
aquifer.

Explicação

Questão 39 de 150

1

The degree to which a soil or rock allows groundwater to flow is called

Selecione uma das seguintes:

permeability.
porosity.
aquifer.
hydraulic gradient.

Explicação

Questão 40 de 150

1

The flow of groundwater depends on

Selecione uma das seguintes:

hydraulic gradient, and hydraulic conductivity.
porosity and permeability.
permeability only.
porosity only.

Explicação

Questão 41 de 150

1

Groundwater is water

Selecione uma das seguintes:

below the water table.
above the water table.
that soaks into the ground.
beneath the ground surface.

Explicação

Questão 42 de 150

1

The driving force of our planet's hydrologic cycle comes from

Selecione uma das seguintes:

wind.
precipitation of water over the oceans.
the balance between precipitation and evaporation.
solar energy.

Explicação

Questão 43 de 150

1

A soil composed of flattened soil particles will most likely have a

Selecione uma das seguintes:

low porosity.
high permeability.
high porosity.
low hydraulic conductivity.

Explicação

Questão 44 de 150

1

The flow of groundwater is

Selecione uma das seguintes:

from where the water table is high to where it is low.
insignificant.
as fast as the water in streams.
from where the water table is low to where it is high.

Explicação

Questão 45 de 150

1

A mineral that is not a silicate is

Selecione uma das seguintes:

calcite
quartz
feldspar
mica

Explicação

Questão 46 de 150

1

Galena belongs to the class of minerals known as the

Selecione uma das seguintes:

sulfides
silicates
carbonates
sulfates

Explicação

Questão 47 de 150

1

Which of the following properties most clearly reflects the internal arrangement of atoms in a crystalline material?

Selecione uma das seguintes:

luster
density
color
cleavage

Explicação

Questão 48 de 150

1

The process of crystallization acts to

Selecione uma das seguintes:

enrich the crystallized minerals in silica
deplete the molten magma of silica
enrich the molten magma in silica
none of the above

Explicação

Questão 49 de 150

1

The last minerals to crystallize are those with the

Selecione uma das seguintes:

higher melting point
lower melting point

Explicação

Questão 50 de 150

1

A soil composed of well-rounded sand grains of uniform size will most likely have a

Selecione uma das seguintes:

low porosity
high porosity
low permeability
high permeability

Explicação

Questão 51 de 150

1

The following statement describes which subatomic particle best?

It is a nucleon.

Selecione uma das seguintes:

an electron
a proton
a neutron
proton and neutron

Explicação

Questão 52 de 150

1

How many electrons are there in the third shell of sodium, Na (atomic number 11)?

Selecione uma das seguintes:

none
one
two
three

Explicação

Questão 53 de 150

1

What is the name of the following compound?

NaF

Selecione uma das seguintes:

natural fosfate
nitrogen afleck
sodium fluoride
sodium phosphide
natrium fluoride

Explicação

Questão 54 de 150

1

Which of the following would be considered applied research?

Selecione uma das seguintes:

examining how susceptible a metal is to bending
determining how readily a metal corrodes in a wet environment
determining the lightest and strongest metal to be used for an airplane wing
determining the melting temperature of a metal
testing the strength of a piece of metal

Explicação

Questão 55 de 150

1

Which of the following statements best describes an element?

Selecione uma das seguintes:

a material that has consistent physical properties
a material with more than one type of atom
a material consisting of only one type of atom
a material that has consistent chemical properties
a material that is pure

Explicação

Questão 56 de 150

1

Which of these does not describe a metal at room temperature?

Selecione uma das seguintes:

bendable
gas
solid
liquid
shiny

Explicação

Questão 57 de 150

1

How would you describe the volume of the following object?

the amount of water in a swimming pool

Selecione uma das seguintes:

macroscopic
microscopic
submicroscopic
all of the above
none of the above

Explicação

Questão 58 de 150

1

Which of the following physical properties would you expect for krypton (Kr)?

Selecione uma das seguintes:

shiny
brittle
conducts electricity
a gas at room temperature
hard

Explicação

Questão 59 de 150

1

How many different elements are in the compound C₆H₁₂O₆.

Selecione uma das seguintes:

3
24
6
All of the elements are the same.

Explicação

Questão 60 de 150

1

Which of the following statements does not describe a proton?

Selecione uma das seguintes:

It orbits around the nucleus of an atom.
It is a nucleon.
It has a positive charge equivalent but opposite of an electron's.
It is attracted to negatively charged electrical plates.
It is much more massive than an electron.

Explicação

Questão 61 de 150

1

Which of the following is not a nonmetal?

Selecione uma das seguintes:

sulfur (atomic no. = 16)
xenon (atomic no. = 54)
titanium (atomic no. = 22)
selenium (atomic no. = 34)
helium (atomic no. = 2)

Explicação

Questão 62 de 150

1

Which of the following would be considered basic research?

Selecione uma das seguintes:

testing a safe, nontoxic mouse glue
testing the strength of a mouse cage
examining how quickly a trapdoor closes
examining why a mouse likes cheddar cheese more than swiss cheese
studying ways of catching mice safely

Explicação

Questão 63 de 150

1

What is the main difference between a conceptual model and a physical model?

Selecione uma das seguintes:

Physical models and conceptual models can be used to describe the same things.
Physical models can only be used to represent the real world.
A physical model represents the shape and form while a conceptual model describes how a system behaves.
Conceptual models can only be used to describe concepts.
A conceptual model represents the shape and form while a physical model describes how a system behaves.

Explicação

Questão 64 de 150

1

A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.

Selecione uma das seguintes:

The dog is smelling molecules from the cat.
The cat is leading the dog into a trap.
The dog is smelling atoms from the cat
The dog is following the areas of increased density of the Earth.

Explicação

Questão 65 de 150

1

If you remove two protons and two neutrons from a gold atom (Au), what new element is formed (if any)?

Selecione uma das seguintes:

Au-2
Au
Re
Tl
Ir

Explicação

Questão 66 de 150

1

Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties?

Selecione uma das seguintes:

Yes, but that their properties are similar is only a coincidence.
Yes, and this explains how fish are able to breathe water.
No, compounds are uniquely different from the elements from which they're made.
No, but their similar properties are only a coincidence.

Explicação

Questão 67 de 150

1

Which of the following would be considered a chemical property?

Selecione uma das seguintes:

melting temperature
reactivity towards water
boiling temperature
conductivity
flexibility

Explicação

Questão 68 de 150

1

Which of the following statements about electrons is true?

Selecione uma das seguintes:

Electrons have a negative charge.
Electrons are particles.
Electrons in atoms can be excited by light energy.
Electrons behave like waves.
all of the above

Explicação

Questão 69 de 150

1

Should the periodic table be memorized? Why or why not?

Selecione uma das seguintes:

No. The periodic table changes every year. Memorizing it would be a waste of time.
Yes. Without memorizing the periodic table, one would not have any real understanding of how and why chemical compounds are put together.
Yes. Like the alphabet, we need to memorize the periodic table in order to easily write the language of chemistry.
No. The periodic table is a reference to be used, not memorized.

Explicação

Questão 70 de 150

1

The following image describes which type of change?

Selecione uma das seguintes:

an elemental change
a chemical change
no change
a physical change
a change in reactivity

Explicação

Questão 71 de 150

1

The mass number of an element is ________.

Selecione uma das seguintes:

the sum of the isotopes
the sum of the electrons and the neutrons
the number of protons
the sum of the protons and the neutrons
the sum of the electrons and the protons

Explicação

Questão 72 de 150

1

How many atoms are in one molecule of Na₂SO₄

Selecione uma das seguintes:

4
7
24
2
3

Explicação

Questão 73 de 150

1

Which element has the atomic number 12?

Selecione uma das seguintes:

Mg
Be
B
Na
C

Explicação

Questão 74 de 150

1

How is the term photon related to the term quantum?

Selecione uma das seguintes:

A quantum is a wave of light while a packet of quanta equals one photon.
A quantum is a particle of light while a photon is a wave of light.
A quantum of light is actually one photon.
A quantum is a particle of light exactly one photon long.
A quantum of photons is equal to the wavelength.

Explicação

Questão 75 de 150

1

What was Niels Bohr's explanation for the observation of atomic spectra?

Selecione uma das seguintes:

Nucleons could be excited by different electron energies.
Any photon could excite an electron.
Only certain photons with the correct energy could excite the quanta in the nucleus.
Electrons could only move in discrete energy steps within an atom.
Electrons could not move in an atom.

Explicação

Questão 76 de 150

1

Which of the following elements will most likely be shiny and flexible?

Selecione uma das seguintes:

iodine (I)
silicon (Si)
rhodium (Rh)
hydrogen (H)
helenium (Se)

Explicação

Questão 77 de 150

1

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

Selecione uma das seguintes:

24
52
26
none

Explicação

Questão 78 de 150

1

Why isn't dirt listed in the periodic table?

Selecione uma das seguintes:

Elements like dirt and air are so common that there is no need to list them in the periodic table.
Dirt IS listed in the periodic table but is not easily recognized because it is listed as one of the rare earths with its old scientific name, dysprosium, symbol Dy.
The periodic table lists only elements made of one kind of material. Dirt is a mixture of elements and compounds.
None of the above is true.

Explicação

Questão 79 de 150

1

Strontium, Sr (number 38), is especially dangerous to humans because it tends to accumulate in calcium-dependent bone marrow tissues (calcium, Ca, number 20). This fact relates to the organization of the periodic table in that strontium and calcium are both

Selecione uma das seguintes:

in group 2 of the periodic table.
soluble in water
metals
made of relatively large atoms

Explicação

Questão 80 de 150

1

Which of the following elements are in the same group as silicon (Si)?

Selecione uma das seguintes:

B
P
C
As
none of the above

Explicação

Questão 81 de 150

1

What is the name of the following compound?

CO2

Selecione uma das seguintes:

carbon dioxide
calcium oxide
dicobalt
calcium dioxide
dioxocarbon

Explicação

Questão 82 de 150

1

Which of the following is said to be quantized?

Selecione uma das seguintes:

the volume of air in a balloon
the amount of water in a glass
the amount of time in an hour
the number of eggs in an egg carton
none of the above

Explicação

Questão 83 de 150

1

What is the valence shell?

Selecione uma das seguintes:

It is the shell of electrons in element V (atomic no. = 23)
It is the last partially filled orbital in an atom.
It is the shell of electrons in an atom that is the least reactive.
It is the same as the orbital configuration.
It is the outermost shell of electrons in an atom.

Explicação

Questão 84 de 150

1

Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size?

Selecione uma das seguintes:

Protons contribute more to an atom's mass while electrons contribute more to its size.
Protons contribute more to both the mass and size of an atom.
Electrons contribute more to both the mass and size of an atom.
Electrons contribute more to an atom's mass while protons contribute more to its size.

Explicação

Questão 85 de 150

1

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.

Selecione uma das seguintes:

compound
group
textbook
row
period

Explicação

Questão 86 de 150

1

What do the components of a conceptual model have in common?

Selecione uma das seguintes:

Each component must correlate with a corresponding component of a physical model.
All components interact with each other.
The components have nothing in common. This is what differentiates a conceptual model from a physical model.
All components are mutually independent of each other.

Explicação

Questão 87 de 150

1

Which of the following is an example of a physical change?

Selecione uma das seguintes:

charcoal being converted into ash
a candy bar being digested by a student
iron metal reacting with oxygen to form rust
water boiling and being converted into steam
water being electrolyzed and being converted in hydrogen and oxygen

Explicação

Questão 88 de 150

1

Which of these properties describes a metal?

Selecione uma das seguintes:

fragile
brittle
doesn't conduct electricity very well
conducts heat very well
transparent

Explicação

Questão 89 de 150

1

What is the name of the following compound?

CaCl2

Selecione uma das seguintes:

calcium chloride
dicalcium chloride
carbon chloride
dichlorocalcium
calc two

Explicação

Questão 90 de 150

1

Which are older, the atoms in the body of an elderly person or those in the body of a baby?

Selecione uma das seguintes:

It depends upon their diet.
An elderly person because they have been around much longer.
They are of the same age, which is appreciably older than the solar system.
A baby because this is surely a trick question.

Explicação

Questão 91 de 150

1

Which of the following statements describes an isotope?

Selecione uma das seguintes:

element with the same number of protons but a different number of electrons
element with the same number of neutrons but a different number of electrons
element with the same number of protons but a different number of neutrons
element with the same number of neutrons but a different number of protons
none of the above

Explicação

Questão 92 de 150

1

Would you use a physical model or a conceptual model to describe the following: the brain; the mind; the solar system; the beginning of the universe?

Selecione uma das seguintes:

physical; physical; physical; physical
conceptual; conceptual; conceptual; conceptual
physical; conceptual; physical; conceptual
conceptual; physical; conceptual physical

Explicação

Questão 93 de 150

1

Which of the following could NOT be represented by a conceptual model?

Selecione uma das seguintes:

the energy of a nucleus
the floor plan of a house
the behavior of schoolchildren
the weather

Explicação

Questão 94 de 150

1

Which of the following is a property of light?

Selecione uma das seguintes:

It is a particle.
Its energy comes in packets of uniform size.
It is a wave.
all of the above
none of the above

Explicação

Questão 95 de 150

1

The repeating trends that take place when examining the elements are called ________.

Selecione uma das seguintes:

the metal shift
a group conscience
periodicity (periodic trend)
the family cycle
none of the above

Explicação

Questão 96 de 150

1

Which of the following elements is an alkali metal?

Selecione uma das seguintes:

cerium (Cr)
argon (Ar)
lithium (Li)
lead (Pb)
indium (In)

Explicação

Questão 97 de 150

1

Which atom is smallest?

Selecione uma das seguintes:

Be
Sr
Ca
Mg
All are the same size.

Explicação

Questão 98 de 150

1

Which of the following elements is a transition metal?

Selecione uma das seguintes:

lead (Pb)
xenon (Xe)
silver (Ag)
lithium (Li)
chlorine (Cl)

Explicação

Questão 99 de 150

1

Which of the following describes a nonmetal?

Selecione uma das seguintes:

ductile
malleable
good conductor of heat
poor conductor of electricity
shiny

Explicação

Questão 100 de 150

1

Which of the following elements are in the same period as magnesium (Mg)?

Selecione uma das seguintes:

Ca
Cl
Sr
Mn
none of the above

Explicação

Questão 101 de 150

1

Metals are useful for the structural support of buildings because they

Selecione uma das seguintes:

do not conduct heat well
are strong but can be bent
conduct electricity
are shiny

Explicação

Questão 102 de 150

1

Which of the following bonds would be the most polar?

Selecione uma das seguintes:

C-Cl
C-Br
C-F
C-I
All are equally polar.

Explicação

Questão 103 de 150

1

Which of the following bonds would be the least polar?

Selecione uma das seguintes:

C-H
C-F
C-O
C-Cl
All are equally polar.

Explicação

Questão 104 de 150

1

The source of an atom's electronegativity is the

Selecione uma das seguintes:

kinetic energy electrons have orbiting the nucleus.
repulsive force occurring among electrons within the same shell.
repulsive force occurring between electrons within neighboring shells.
positively charged atomic nucleus.

Explicação

Questão 105 de 150

1

If you mix a typical aluminum ion (Al, atomic no. = 13) with a typical oxygen ion (O, atomic no. = 8), what compound is formed?

Selecione uma das seguintes:

Al2O3
Al13O8
Al3O2
Al3O
Al2O2

Explicação

Questão 106 de 150

1

Which of the following elements will most likely not form an ion at all?

Selecione uma das seguintes:

Na
Mg
Br
O
Ar

Explicação

Questão 107 de 150

1

Which of the following is the weakest?

Selecione uma das seguintes:

A dipole-induced dipole attraction
A dipole-dipole attraction
An induced dipole-induced dipole attraction
An ion-dipole attraction
A chemical bond

Explicação

Questão 108 de 150

1

Which of the following compounds contains ionic bonds?

Selecione uma das seguintes:

CH4
OF2
Cl2
K2O
none of the above

Explicação

Questão 109 de 150

1

If a neutral atom loses one electron, what is the electrical charge of the atom?

Selecione uma das seguintes:

+2
-2
+1
-1
neutral

Explicação

Questão 110 de 150

1

What is the main difference between a dipole-dipole interaction and a dipole-induced dipole interaction?

Selecione uma das seguintes:

Dipole-induced dipole interactions are stronger because the induced dipoles can be formed at any time.
Dipole-dipole interactions are weaker because the dipoles are permanent.
Both are similar, but one involves a temporary dipole created by a permanent dipole.
Both are identical.
none of the above

Explicação

Questão 111 de 150

1

Which of the following statements describes a polar molecule?

Selecione uma das seguintes:

The molecules are usually not attracted to one another very strongly.
Polar molecules have the weakest intermolecular interactions with ionic compounds.
The electrons in the molecule are distributed evenly throughout the molecule.
The molecules have a high degree of symmetry.
None of these statements describe polar molecules.

Explicação

Questão 112 de 150

1

What is one role of unpaired valance electrons?

Selecione uma das seguintes:

They are the nonbonding electrons.
They tell us which Lewis dot structure is correct.
They take part in the formation of different types of bonds.
They keep the paired electrons separated to minimize interaction.
They provide the number of Lewis dots.

Explicação

Questão 113 de 150

1

Which of the following does not describe ionic compounds?

Selecione uma das seguintes:

They have a tendency to melt easily.
They are usually very ordered.
They consist of positive and negative ions.
They are held together by electrostatic attraction.
none of the above

Explicação

Questão 114 de 150

1

Which of the following molecules is the most polar?

Selecione uma das seguintes:

HCl
BrF
Br2
CO

Explicação

Questão 115 de 150

1

What is the valence shell?

Selecione uma das seguintes:

It is the shell of electrons in element V (atomic no. = 23)
It is the shell of electrons in an atom that is the least reactive.
It is the same as the orbital configuration.
It is the last partially filled orbital in an atom.
It is the outermost shell of electrons in an atom.

Explicação

Questão 116 de 150

1

Which of the following best describes ionic bonding?

Selecione uma das seguintes:

two atoms exchanging a set of electrons
two atoms sharing a set of electrons
one atom giving up some of its electrons to another atom
when two elements with same charge are held together by electrostatic forces
none of the above

Explicação

Questão 117 de 150

1

Which of the following statements is untrue?

Selecione uma das seguintes:

Covalent molecules usually have low melting points.
Covalent molecules can have nonbonding electrons.
Covalent bonds can involve more than one pair of electrons.
Covalent molecules are never crystalline.
All of the above statements are true.

Explicação

Questão 118 de 150

1

Which of the following elements will most likely form an ion with a +1 charge?

Selecione uma das seguintes:

Al
Mg
Cl
Na
Si

Explicação

Questão 119 de 150

1

Which of the following is not a property of metal?

Selecione uma das seguintes:

conducts electricity
is strong, but can be bent
does not conduct heat well
is shiny
All of the above are properties of metals.

Explicação

Questão 120 de 150

1

How many valence electrons does bromine (Br, atomic no. = 35) have?

Selecione uma das seguintes:

28
7
21
1
35

Explicação

Questão 121 de 150

1

How is the number of unpaired valence electrons in an atom related to the number of bonds that the atom can form?

Selecione uma das seguintes:

There is no defined relationship between the number of unpaired valence electrons and number of bonds that the atom can form.
The number of unpaired valence electrons in an atom is the same as the number of bonds that the atom can form.
The number of unpaired valence electrons in an atom is twice the number of bonds that the atom can form.
The number of unpaired valence electrons in an atom is one-half the number of bonds that the atom can form.

Explicação

Questão 122 de 150

1

Which of the following elements will most likely form an ion with a -2 charge?

Selecione uma das seguintes:

Mg
S
Cl
Ne
Na

Explicação

Questão 123 de 150

1

How many valence electrons does gallium (Ga, atomic no. = 31) have?

Selecione uma das seguintes:

1
31
3
6
70

Explicação

Questão 124 de 150

1

Is an ionic compound an example of a chemical compound, or is a chemical compound an example of an ionic compound?

Selecione uma das seguintes:

An ionic compound is an example of a chemical compound.
Each is an example of the other.
An chemical compound is an example of a ionic compound.
Neither is an example of the other.

Explicação

Questão 125 de 150

1

The concept of a chemical bond is ________.

Selecione uma das seguintes:

how two or more electrons reside in an orbital
the sharing of nucleons
how two or more atoms are held together
how much energy it takes to remove an electron from a set of atoms
none of the above

Explicação

Questão 126 de 150

1

How would you classify the following material?

a cappuccino (with foam)

Selecione uma das seguintes:

a solution
a heterogeneous mixture
a suspension
a compound
an element

Explicação

Questão 127 de 150

1

Why is secondary treatment often needed for sewage?

Selecione uma das seguintes:

The solution is contaminated with dangerous bacteria.
The dissolved organics are too high and lead to bacterial growth
There are too many finely divided particles that need to be filtered.
There are too many dissolved inorganic compounds.
none of the above

Explicação

Questão 128 de 150

1

What is the difference between a compound and a mixture?

Selecione uma das seguintes:

The components of a mixture do not have the same properties individually as they do when mixed.
A compound can be physically separated into its components; a mixture cannot be physically separated into its components.
A compound is just a mixture of elements.
A mixture can be physically separated into its components; a compound cannot be physically separated into its components.
The components of a compound have the same properties individually as they do when mixed.

Explicação

Questão 129 de 150

1

Which of the following statements describes a saturated solution?

Selecione uma das seguintes:

a solution of salt water with salt at the bottom
a carbonated beverage with bubbles
a solution where the solvent cannot dissolve any more solute
all of the above
none of the above

Explicação

Questão 130 de 150

1

In a solution of 77 percent nitrogen and 23 percent oxygen, which is the solvent?

Selecione uma das seguintes:

nitrogen
oxygen
both
neither
Gases cannot form solutions.

Explicação

Questão 131 de 150

1

What is molarity?

Selecione uma das seguintes:

the number of liters of solute per mole of solution
the number of moles of solute per liter of solution
the number of moles of solute per liter of solvent
the number of grams of solute per liter of solution
none of the above

Explicação

Questão 132 de 150

1

What statement best describes a mole?

Selecione uma das seguintes:

It is a very large number chemists use to count atoms or molecules.
the amount of molecules or atoms in 1 gram of something
a very small number chemists use to count atoms or molecules
a little furry mammal that lives in the ground
none of the above

Explicação

Questão 133 de 150

1

How would you classify the following material?

swimming pool water

Selecione uma das seguintes:

heterogeneous mixture
a pure element
a pure compound
homogeneous mixture
depends on how many children have been in it

Explicação

Questão 134 de 150

1

How does a suspension differ from a solution?

Selecione uma das seguintes:

A suspension is a heterogeneous mixture consisting of different phases whereas a solution is a homogeneous mixture consisting of a single phase.
The difference between a suspension and a solution can only be determined by chemical means.
A suspension is a heterogeneous mixture whose components can be separated by simple filtration. A solution is a homogeneous mixture which cannot be separated by simple filtration.
Although a solution and suspension are both homogeneous mixtures, only the components of a suspension will separate by spinning the mixture in a centrifuge.

Explicação

Questão 135 de 150

1

Mixtures can be separated into their components by taking advantage of differences in the chemical properties of the components. Why might this separation method be less convenient than taking advantage of differences in the physical properties of the components?

Selecione uma das seguintes:

The chemical properties of the components of a mixture are too different from each other.
The chemical properties of the components of a mixture are too similar to each other.
A chemical property involves a chemical change so that you no longer have what you had.
Chemical properties are not as apparent as are physical properties.

Explicação

Questão 136 de 150

1

The following image represents which kind of matter?

Selecione uma das seguintes:

a compound
an element
a mixture
none of the above
all of the above

Explicação

Questão 137 de 150

1

The following image represents which kind of matter?

Selecione uma das seguintes:

an element
a mixture
a compound
none of the above
all of the above

Explicação

Questão 138 de 150

1

Which of the following solutions is the most concentrated?

Selecione uma das seguintes:

0.1 liter of water with 1 gram of sugar
0.5 liter of water with 50 grams of sugar
2 liters of water with 0.2 gram of sugar
3 liters of water with 30 grams of sugar
They all have the same concentration.

Explicação

Questão 139 de 150

1

Is the air in your house a homogeneous or heterogeneous mixture?

Selecione uma das seguintes:

heterogeneous because of the dust particles it contains
homogeneous because it is all at the same temperature
homogeneous because it is mixed very well
heterogeneous because it consists of different types of molecules

Explicação

Questão 140 de 150

1

What is the first step in treating raw sewage?

Selecione uma das seguintes:

removal of sludge
removal of grit by settling
filtration of solids
disinfection
removal of fine particles by settling

Explicação

Questão 141 de 150

1

Which has the most atoms?

Selecione uma das seguintes:

a mole of helium
a mole of gold
a mole of lead
All of the above have the same number of atoms.
none of the above

Explicação

Questão 142 de 150

1

Which of the following would be considered a heterogeneous mixture?

Selecione uma das seguintes:

water
milk
vinegar
vegetable oil
salad dressing

Explicação

Questão 143 de 150

1

In a solution made from one teaspoon of sugar and one liter of water, which is the solute?

Selecione uma das seguintes:

sugar
the teaspoon
water
both sugar and water
none of the above

Explicação

Questão 144 de 150

1

Which of the following is a mixture?

Selecione uma das seguintes:

helium
iron
air
gold
salt

Explicação

Questão 145 de 150

1

What is the purpose of treating water with chlorine gas or ozone during water purification?

Selecione uma das seguintes:

to improve taste
to kill bacteria
to improve color
to remove solids
none of the above

Explicação

Questão 146 de 150

1

How is the solubility of a gas affected by temperature?

Selecione uma das seguintes:

As temperature goes up, the solubility goes up.
As temperature goes up, the solubility stays the same.
As temperature goes down, the solubility goes down.
As temperature goes down, the solubility goes up.
Both: As temperature goes up, the solubility goes up....And: As temperature goes up, the solubility stays the same.

Explicação

Questão 147 de 150

1

How is the solubility of a solid affected by temperature?

Selecione uma das seguintes:

As temperature goes up, the solubility goes up.
As temperature goes down, the solubility goes down.
As temperature goes down, the solubility goes up.
As temperature goes up, the solubility goes down.
Both: As temperature goes up, the solubility goes up. ....And: As temperature goes down, the solubility goes down.

Explicação

Questão 148 de 150

1

Which of the following accurately describes osmosis?

Selecione uma das seguintes:

The less concentrated solution gets more dilute.
The more concentrated solution absorbs water from the less concentrated solution.
The less concentrated solution absorbs water from the more concentrated solution.
The ions migrate from the more concentrated solution to the less concentrated.
none of the above

Explicação

Questão 149 de 150

1

How would you classify the following material?

coffee (with milk)

Selecione uma das seguintes:

an element
a compound
a suspension
a heterogeneous mixture
a solution

Explicação

Questão 150 de 150

1

Which of the following would be considered a homogeneous mixture?

Selecione uma das seguintes:

hydrogen cyanide
wine
pretzel
rusty iron
sugar

	Criado por Emelina Solorzano quase 10 anos atrás

Physical Science II-Exams 1-4

Phys Scie II- Final Exam Review (Exam 4, Exam 1, & Exam 2)

Questão 1 de 150

The first minerals to crystallize are those with the

Selecione uma das seguintes:

Explicação

Questão 2 de 150

The last minerals to crystallize from a cooling magma have a

Selecione uma das seguintes:

Explicação

Questão 3 de 150

The protective shells that many sea organisms grow are not minerals because they

Selecione uma das seguintes:

Explicação

Questão 4 de 150

The silicates are the largest mineral group because silicon and oxygen are

Selecione uma das seguintes:

Explicação

Questão 5 de 150

Minerals are formed by the process of

Selecione uma das seguintes:

Explicação

Questão 6 de 150

The first minerals to crystallize from a cooling magma have a

Selecione uma das seguintes:

Explicação

Questão 7 de 150

Minerals are composed of

Selecione uma das seguintes:

Explicação

Questão 8 de 150

The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with

Selecione uma das seguintes:

Explicação

Questão 9 de 150

The most common mineral in Earth's crust is ________, and the second most common mineral is ________.

Selecione uma das seguintes:

Explicação

Questão 10 de 150

The last minerals to crystallize from a cooling magma have the

Selecione uma das seguintes:

Explicação

Questão 11 de 150

Silica has a relatively

Selecione uma das seguintes:

Explicação

Questão 12 de 150

The Mohorovicic discontinuity occurs because of a

Selecione uma das seguintes:

Explicação

Questão 13 de 150

In comparison to P-waves, S-waves

Selecione uma das seguintes:

Explicação

Questão 14 de 150

The Earth's magnetic field is attributed to the

Selecione uma das seguintes:

Explicação

Questão 15 de 150

The asthenosphere is part of the

Selecione uma das seguintes:

Explicação

Questão 16 de 150

The speed of a seismic wave depends on

Selecione uma das seguintes:

Explicação

Questão 17 de 150

Which seismic waves produce a wave shadow?

Selecione uma das seguintes:

Explicação

Questão 18 de 150

The Mohorovicic discontinuity marks the change in rock density elasticity between the

Selecione uma das seguintes:

Explicação

Questão 19 de 150

The Earth's layer with plastic-like behavior is the

Selecione uma das seguintes:

Explicação

Questão 20 de 150

The lithosphere includes

The most common mineral in Earth's crust is , and the second most common mineral is .