AnswersTX-Chemistry A-CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

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What is the name of the ionic compound RbCl?

A
rubidium chloride
B
chlorine rubidium
C
rubidium chlorine
D
chlorine rubidide
42
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Which is the formula for diarsenic pentoxide?

A
Ar2O5
B
As5O2
C
As2O5
D
2As5O
43

How many hybrid orbitals are found in CCl4?

A
one
B
two
C
three
D
four
44

Two students are given two different size blocks of the same substance and are instructed to determine the properties of the substance. Which statement describes a property that will be the same for both students?

A
length because it is an extensive property
B
mass because it is an extensive property
C
boiling point because it is an intensive property
D
volume because it is an intensive property
45

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

A
FeOH
Option A
B
Fe(OH)
Option B
C
FeOH
Option C
D
FeOH
46

A sample of ammonia reacts with oxygen as shown.4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g)What is the limiting reactant if 4.0 g of NH3 react with 8.0 g of oxygen?

Question illustration
A
O2 because it produces only 0.20 mol of NO.
B
NH3 because it produces only 0.20 mol of NO.
C
O2 because it produces two times less NO than NH3.
D
NH3 because it produces three times more NO than O2.
47

Which is a component of John Dalton’s atomic theory?

A
The ratio of atoms in a compound is fixed.
B
The atoms of different elements are the same.
C
An atom is a small particle of matter that can be broken down.
D
A reaction can create or destroy atoms as well as rearrange them.
48

Where in the laboratory is long, unrestrained hair most likely to be a safety concern?

A
near an open flame
B
close to a fume hood
C
next to a concentrated sodium chloride solution
D
by a cabinet that contains flammable liquids
49

To show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure?

A
Orbital notation takes up less space.
B
Orbital notation shows the spin of the electrons.
C
Orbital notation makes it easier to count the electrons.
D
Orbital notation shows the electron distribution in shells.
50

CFCs were found to destroy what important compound in our atmosphere?

A
ozone
B
nitrogen
C
water vapor
D
helium

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