AnswersCR Chemistry S1 Q3050OXCumulative Exam

Cumulative Exam — Cumulative exam Answers

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The table shows the mechanical energy and velocity of a rock that was thrown four times. The rock has a mass of 2.4 kg.During which trial was the rock the highest above the ground?

Question illustration
A
1
B
2
C
3
D
4
2
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Which of the following observations would indicate that a material is a pure substance?

A
It does not dissolve in water.
B
It changes color after heating.
C
It cannot be physically broken down into different types of atoms.
D
It can be physically broken down into different types of molecules.
3

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
4

Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of both substances before conduction occurred?

A
Their molecules had the same amount of energy.
B
The substances were the same temperature.
C
Substance X’s molecules were faster than substance Y’s.
D
Substance X was cooler than substance Y.
5

Why do scientists study seismographs?

A
to learn about different rock samples
B
to determine the location of an epicenter
C
to analyze mineral content from Earth’s crust
D
to observe temperature changes on Earth’s surface
6

Which statement describes a limitation of the kinetic-molecular theory for a gas?

A
The theory assumes that particles do not experience intermolecular forces.
B
The theory states that pressure is inversely proportional to volume.
C
The theory assumes that particles are in random and continuous motion.
D
The theory states that pressure increases with temperature.
7

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.
8

The chart shows the temperatures of four different substances.

Question illustration
A
15
B
18
C
20
D
25
9

A spring that has a spring constant of 1400 N/m is stretched to a length of 2.5 m. If the normal length of the spring is 1.0 m, how much elastic potential energy is stored in the spring?

A
700 J
B
1050 J
C
1575 J
D
4375 J
10

How many electrons can the n = 4 shell hold?

A
8
B
16
C
32
D
64
11

A sample of octane (C8H18) that has a mass of 0.750 g is burned in a bomb calorimeter. As a result, the temperature of the calorimeter increases from 21.0°C to 41.0°C. The specific heat of the calorimeter is 1.50 J/(g • °C), and its mass is 1.00 kg. How much heat is released during the combustion of this sample?Use .

Question illustration
A
22.5 kJ
B
30.0 kJ
C
31.5 kJ
D
61.5 kJ
12

Four different balls are moving at the same velocity. Which will have the greatest kinetic energy as it rolls?

A
a golf ball
B
a bowling ball
C
a tennis ball
D
a soccer ball
13

An ice cube is dropped into a glass of milk at 20°C. Which statement explains the transfer of kinetic energy (KE)?

A
Because milk has higher KE than ice, KE is transferred from the milk to the molecules of ice.
B
Because milk has higher KE than ice, KE is transferred from the molecules of ice to the milk.
C
Because ice has higher KE than milk, KE is transferred from the milk to the molecules of ice.
D
Because ice has higher KE than milk, KE is transferred from the molecules of ice to the milk.
14

Which describes the movement of a fluid during convection?

A
Warm and cool fluids rise.
B
Warm and cool fluids sink.
C
Warm fluid rises and cool fluid sinks.
D
Warm fluid sinks and cool fluid rises.
15

Which is a property of covalent compounds?

A
They ionize in solution.
B
They tend to be very hard.
C
They have a low boiling point.
D
They have a high melting point.
16

A 60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. How much work was done?

A
–1,440 J
B
–480 J
C
1,440 J
D
2,880 J
17

Which element would most likely have chemical properties similar to that of magnesium (Mg)?

A
Ar
B
Ca
C
F
D
Ni
18

Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write out?

A
a set of quantum numbers for the last electron in the atom
B
a configuration with numbers, letters, and superscripts
C
a dot structure of the atom
D
an orbital notation of the atom
19

Four landing sites are proposed for a lander. Data about the sites are listed in the table.

Question illustration
A
W
B
X
C
Y
D
Z
20

Which example is indirect evidence used to study Earth’s interior?

A
composition of minerals in a rock
B
age of a rock from within Earth
C
location of an earthquake’s epicenter
D
texture of different core samples

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