AnswersFL-2003350-Chemistry 1 HonorsCumulative Exam

Cumulative Exam — Cumulative exam Answers

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An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement describes the most likely result?

A
The energy absorbed in the first move equals the energy released in the second move.
B
The energy absorbed in the first move is greater than the energy released in the second move.
C
The energy released in the first move equals the energy absorbed in the second move.
D
The energy released in the first move is greater than the energy absorbed in the second move.
2
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The boiling points of different substances are given in the table below.SubstanceBoiling point (°C)Acetic acid118.1Benzene80.2Chloroform61.2Water100.0Which substance most likely has the strongest intermolecular forces?

A
acetic acid
B
benzene
C
chloroform
D
water
3

An entire group of elements was unknown when the periodic table was first developed because they were unreactive and no known compounds were composed of them. What most likely led to the inclusion of these elements in the periodic table?

A
the formation of a compound in the laboratory
B
new technology that showed how to identify one of the elements
C
improvements in instruments to measure small masses
D
more careful experiments to create synthetic elements
4

Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?

A
Energy is removed from the particles in each change, but more energy is removed in melting than in boiling because the attractions are weaker.
B
Energy is removed from the particles in each change, but more energy is removed in boiling than in melting because the attractions are weaker.
C
Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.
D
Energy is added to the particles in each change, but melting requires more energy than boiling because the attractions must be completely overcome.
5

What is the element Ar classified as in the periodic table?

A
a noble gas
B
a halogen
C
a metalloid
D
a metal
6

The periodic table below shows the electronegativity values of some elements.ElectronegativitiesConsider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which element require the least amount of energy to give up an electron when forming chemical bonds?

Question illustration
A
barium
B
sulfur
C
silicon
D
calcium
7

The volume of a fixed amount of gas is doubled, and the absolute temperature is doubled. According to the ideal gas law, how has the pressure of the gas changed?

A
It has increased to two times its original value.
B
It has increased to four times its original value.
C
It has decreased to one-half its original value.
D
It has stayed the same.
8

What is the best reason for the scientific community to accept a theory?

A
The theory is supported by all the available observations and data.
B
An award-winning scientist proposed the theory.
C
The majority of the general public agrees with the theory.
D
The theory contradicts an older theory.
9

There are 6.022 1023 atoms of Hg in 1 mole of Hg. The number of atoms in 4.5 moles of Hg can be found by multiplying 4.5 by 6.022 1023. Which is the number of atoms in 4.5 moles of Hg, correctly written in scientific notation with the correct number of significant figures?

Question illustration
A
2.7 1024
Option A
B
27 1023
Option B
C
2.71 1024
Option C
D
27.099 1023
Option D
10

What is the chemical formula for iron(II) hydroxide?

A
FeOH
Option A
B
Fe(OH)
Option B
C
FeOH
Option C
D
FeOH
11

Derek needs a tool that delivers 5.00 mL of a sodium hydroxide solution. Which tool would be best for him to use?

A
a beaker
B
a pipette
C
a graduated cylinder
D
an Erlenmeyer flask
12

Which statement explains how the bands in the crystal of a metal are like atomic orbitals?

A
They both have localized electrons that orbit specific atoms.
B
They both involve ionization of some atoms so bonding can occur.
C
They both have localized electrons that move from atom to atom.
D
They both allow electrons to move from lower energy levels to higher energy levels.
13

In which orbitals would the valence electrons for carbon (C) be placed?

A
s orbital and d orbitals
B
s orbital only
C
p orbitals only
D
s orbital and p orbitals
14

Why is it advisable to wear long sleeves when students work in a chemistry lab?

A
to provide warmth near the lab refrigerator
B
to protect the arms from lab chemicals
C
to minimize burns from hot water at the lab sink
D
to prevent burns when using a Bunsen burner
15

Before raw data can be used as scientific evidence, it must be analyzed and summarized. One way of summarizing data is to find the mean, or average, of a set of data points. What method is used for calculating the mean?

A
adding the values of all the data points and dividing by the number of data points
B
dividing the value of each data point by the total value of all the data points
C
multiplying the values of the highest and lowest data point, and then dividing by two
D
subtracting the highest value among the data points from the lowest value
16

A scientist wants to perform a controlled experiment to test the effect of rust on chemically treated iron. Which action would be most important to perform in a controlled experiment?

A
Design an experiment that is based on previously published results.
B
Expose the treated iron to the corrosive effects of the air.
C
Test a large piece of treated iron and a small piece of untreated iron.
D
Test a piece of treated iron and a piece of untreated iron under the same conditions.
17

Which is the formula for diarsenic pentoxide?

A
Ar2O5
B
As5O2
C
As2O5
D
2As5O
18

Which element would most likely have chemical properties similar to that of fluorine (F)?

A
Ne
B
N
C
Li
D
Br
19

The diagrams below represent the four states of matter. Diagram 1 Diagram 2 Diagram 3 Diagram 4Which diagram represents a gas that has been ionized?

Question illustration
A
diagram 1
B
diagram 2
C
diagram 3
D
diagram 4
20

Which diagram shows electrons violating the Pauli exclusion principle?

A
A box contains an up arrow.
Option A
B
A box contains an up and a down arrow.
Option B
C
A box contains an up and a down arrow.
Option C
D
A box contains an up and a down arrow.
Option D

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