AnswersSY2026-27 - 2003340 Chemistry 1 Sem 2 CRWriting and Balancing Chemical Equations

Writing and Balancing Chemical Equations — Unit test Answers

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1
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When the process of condensation occurs, the kinetic energy of particles

A
is insufficient to overcome intermolecular forces.
B
becomes independent of temperature.
C
becomes exactly equal to the intermolecular forces.
D
easily overcomes the intermolecular forces.
2
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A gaseous substance turns directly into a solid. Which term describes this change?

A
deposition
B
evaporation
C
melting
D
sublimation
3

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?Use and .

Question illustration
A
0.83 L
B
3.33 L
C
5.60 L
D
20.8 L
4

The diagram below shows the different phase transitions that occur in matter.Which best describes the process that arrow 1 represents?

Question illustration
A
Molecules are speeding up during boiling.
B
Molecules are depositing as ice on a surface.
C
Molecules are slowing down during condensing.
D
Molecules are moving from stationary positions.
5

The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?

A
pressure
B
temperature
C
volume
D
moles
6

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

A
Particles move independently of one another and are widely spaced.
B
Particle kinetic energy increases with increasing temperature.
C
Particles exert no attractive or repulsive force on one another.
D
Particles always move even when they have fixed positions.
7

Why do amorphous solids not have a long-range order in the arrangement of their particles?

A
Their formation involves very rapid cooling.
B
They do not have enough particles.
C
Their particles eventually change positions.
D
Their particles always stay in the same positions.
8

Which best characterizes a crystal?

A
a number of high speed particles moving randomly
B
a dense substance that is hard and incompressible
C
a high-energy state of matter made up of a swirling, ionized gas
D
a loose association of particles moving past one another
9

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

A
It will double.
B
It will decrease.
C
It will increase slightly.
D
It will remain the same.
10

Which statement best compares the melting point of butane (C4H10) with that of octane (C8H18)?

A
The melting points of both substances are identical.
B
The melting point is higher for butane.
C
The melting point is higher for octane.
D
The comparison of melting points cannot be made.
11

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another?

A
The volume and the shape stay the same.
B
The volume increases to fill the new container, but the shape stays the same.
C
The volume stays the same, but the shape changes to fit the new container.
D
The volume and the shape change to fill the new container.
12

Which proportionality shows the result of combining Avogadro’s law with Boyle’s law?

A
mc029-1.jpg
Option A
B
mc029-2.jpg
Option B
C
mc029-3.jpg
Option C
D
mc029-4.jpg
Option D
13

Consider the temperature versus time graph below.At what temperature is the substance a heated gas?

Question illustration
A
at 100°C
B
below 0°C
C
above 100°C
D
between 0°C and 100°C
14

The diagrams show the particles of a substance.Which statement best describes the process that the diagrams show?

Question illustration
A
A solid loses kinetic energy to become a liquid and then becomes a gas.
B
A solid gains kinetic energy to become a liquid and then becomes a gas.
C
A gas loses kinetic energy to become a liquid and then becomes a solid.
D
A gas gains kinetic energy to become a liquid and then becomes a solid.
15

Which commercial technology commonly uses plasmas?

A
a radio
B
a race car
C
a television
D
a microwave oven

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