AnswersChemistryStates and Changes of Matter

States and Changes of Matter — Test Answers

25 verified answers
1
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Which event is most likely occurring?

A
diffusion because particles move from regions of high concentration to regions of low concentration
B
diffusion because particles move from regions of low concentration to regions of high concentration
C
effusion because there is a movement of a gas through a small opening into a larger volume
D
effusion because there is a movement of a gas through a large opening into a smaller volume
2
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Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?

A
1
B
3
C
4
D
5
3

Water’s molar mass is 18 point 0 1 g over mol The molar mass of glycerol is 92 point 0 9 g over mol At 25 times degree C , glycerol is more viscous than water. Which substance has the stronger intermolecular attraction?

A
glycerol because it has a larger molar mass
B
water because it is less viscous and has a lower molar mass
C
glycerol because it is more viscous and has a larger molar mass
D
water because it has a lower molar mass
4

Which process is a chemical change?

A
boiling water
B
burning a match
C
breaking glass
D
melting ice
5

Which best identifies where long-range order would be found?

A
in nonthermal plasmas
B
in amorphous solids
C
in crystalline solids
D
in thermal plasmas
6

A student is using a copper strip and a strong chlorine solution in her experiment. Which of these is a chemical property of one of her materials?

A
reactivity of the copper strip
B
odor of the chlorine solution
C
color of the chlorine solution
D
density of the copper strip
7

Which is an aspect of the kinetic-molecular theory and can be used to explain the behavior of plasmas?

A
Particles exchange energy through elastic collisions.
B
Particle spacing can allow a very high density.
C
Particles vibrate quickly in stationary positions.
D
Particle kinetic energy is independent of temperature.
8

A substance is tested in a lab. It is found to maintain a unique shape and is a good conductor of electricity. If it is made up of electrons, protons, and neutrons, what state of matter is this substance most likely to be?

A
gas
B
plasma
C
liquid
D
solid
9

Which device involves the use of plasma in technology?

A
arc welder
B
battery-operated flashlight
C
a car radio
D
diesel engine
10

Which procedure could a student use to examine an intensive property of a rectangular block of wood?

A
Record the length.
B
Determine the density.
C
Measure the volume.
D
Find the mass.
11

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles?

A
It decreases rapidly.
B
It increases quickly.
C
It decreases slowly.
D
It remains the same.
12

Which is the best example of immiscible liquids?

A
two nonpolar liquids that can dissolve into one another
B
two polar liquids that have high surface tensions
C
a polar liquid and a nonpolar liquid that do not dissolve into one another
D
a polar liquid and a nonpolar liquid that have low surface tensions
13

Which statement best explains why heating a liquid affects its viscosity?

A
The molecules move slower at higher temperatures, and the attractions between them decrease.
B
The molecules move faster at higher temperatures, and the attractions between them increase.
C
The molecules move slower at higher temperatures and overcome attractions more easily.
D
The molecules move faster at higher temperatures and overcome attractions more easily.
14

According to the kinetic-molecular theory, the average kinetic energy of gas particles depends on which factor?

A
pressure
B
number of particles
C
temperature
D
volume
15

A perfume bottle is dropped in the corner of a room and it shattered. The odor of the perfume can be detected on the other side of the room. Which statement best describes this observation?

A
Particles are moving from regions of high concentration to low concentration.
B
Particles are moving from regions of low concentration to high concentration.
C
Particles are moving through a small opening into a smaller volume .
D
Particles are moving through a small opening into a larger volume .
16

Glycerol boils at a higher temperature than water. What does this indicate about the attractive forces of glycerol?

A
They are the same as those in water.
B
They are nonexistent.
C
They are weaker than those in water.
D
They are stronger than those in water.
17

The particles of a gas inside a balloon are experiencing an increase in their average kinetic energy and the number of collisions with the wall of the balloon. What is the most likely outcome?

A
higher air pressure outside the balloon
B
a large increase in air temperature outside the balloon
C
a decrease in gas temperature inside the balloon
D
higher gas pressure inside the balloon
18

Which statement describes an intensive property of matter?

A
It is the same for every sample of a single substance.
B
It depends on how a substance was formed.
C
It is the same for every sample of every substance.
D
It depends on the amount of substance present.
19

Which change of state involves a release of energy?

A
melting
B
condensation
C
boiling
D
sublimation
20

Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop of dishwashing detergent is added near it?

A
Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink.
B
Soap makes the water more viscous allowing the paperclip to continue to float.
C
Soap makes the water less viscous making the paperclip sink.
D
Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float.

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