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Chem Semester 2 Final Exam Review #1

Total questions: 90

Worksheet time: 2hrs 15mins

Name
Class
Date
1.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
2.

What is the correct Lewis structure for NH3?

a)
b)
c)
d)
3.

Which is the correct Lewis structure for carbon dioxide?

a)
b)
c)
d)
4.

Metals make _____ ions.

a)

positive

b)

negative

c)

neutral

5.

Nonmetals will make _____ions.

a)

positive

b)

negative

c)

neutral

6.

Why is this Lewis Structure incorrect? Select all that appy.

a)

There should be a single bond between H and C.

b)

There should be a triple bond between C and N.

c)

Carbon has too many bonds around it.

d)

Hydrogen needs more electrons.

7.

Covalent bonding is between a

a)

nonmetal and nonmetal

b)

metal and nonmetal

c)

metal and metal

d)

It depends on the situation

8.

Predict the bond between Mg and Cl

a)

covalent

b)

ionic

c)

metallic

d)

none of the above

9.

What is a valence electron?

a)

electron found in a middle shell

b)

electron found in outermost shell

c)

electron found in innermost shell

d)

electron not found in a shell

10.

a)

ionic

b)

covalent

c)

metallic

d)

acid

11.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
12.

Refer to the image. Which diagrams correctly represent the transfer of electrons in ionic bonding?

a)

Diagram 3 and 4

b)

Diagram 1 and 2

c)

Diagram 1 and 4

d)

Diagram 2 and 3

13.

Which of the following diagrams correctly represents the

formation of a compound consisting of magnesium and fluorine?

a)

A

b)

B

c)

C

d)

D

14.
What is the formula for aluminum fluoride?
a)
AlF
b)
Al2F3
c)
AlF3
d)
Al3F2
15.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
16.
What is the correct formula for the compound, lithium oxide?
a)
LiO
b)
Li2O
c)
LiO2
d)
Li2O2
17.
The name for CrN:
a)
Chromium nitride
b)
Chromium (I) nitride
c)
Chromium (III) nitride
d)
Chromium nitride (III)
18.

What is the charge of Lead in the formula PbO2?

a)

+2

b)

+1

c)

+4

d)

(II)

19.

Which of the following compounds contains both ionic and covalent bonds?

a)

NaCl

b)

CO2

c)

CuC2H3O2

d)

Fe3O2

20.

what is the name of CCl4?

a)

carbon tetrachloride

b)

monocarbon tetrachloride

c)

tetracarbon monochloride

d)

carbon chloride

21.

Name this formula:

KNO3

a)

Potassium Nitrogen Oxide

b)

Potassium Nitride

c)

Potassium Nitrate

d)

Potassium (I) Nitrite

22.

What is the name of the compound SO2

a)

Monosulfate oxide

b)

Sulfur Dioxide

c)

Monosulfur dioxide

23.

What is the name for MgF2 ?

a)

magnesium fluoride

b)

manganese Phosphide

c)

magnesium(III) fluoride

d)

magnesium fluoride(II)

24.

Name the compound CuO

a)

copper (II) oxide

b)

copper oxide

c)

copper (I) oxide

d)

carbon uranium oxide

25.

What is the name of NH3?

a)

Ammonium

b)

Trinitrogen Hydride

c)

Ammonia

d)

Nitrogen Hydride

26.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

27.

What are diatomic elements?

a)

Elements that form two-atom molecules when not combined in a compound.

b)

Two elements that combine with one atom from each element.

c)

Elements that are always in pairs no matter what.

28.

What number do the diatomic elements form on the periodic table?

a)

7

b)

1

c)

2

29.
How many pi bonds does this have? 
a)
1
b)
2
c)
3
d)
4
30.
How many sigma bonds does this have? 
a)
1
b)
2
c)
3
d)
4
31.
How many sigma and pi bonds does this have?
a)
1 sigma and 1 pi
b)
2 sigma and 1 pi
c)
1 sigma and 2 pi
d)
2 sigma and 2 pi
32.

How many sigma bonds are in the following molecule?

a)

0

b)

4

c)

8

d)

12

e)

16

33.
The mass of one mole of substance is called...
a)
molecular mass
b)
mole constant
c)
molar mass
d)
atomic weight
34.
What is the molar mass of fluorine gas?
(beware!)
a)

18.998 g/mol

b)

38.00 g/mol

c)

19.00 g/mol

d)

18 g/mol

35.
What is the molar mass of table salt (NaCl)?
a)

116.89 g/mol

b)

35.45 g/mol

c)

22.99 g/mol

d)

58.44 g/mol

36.
What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?
a)

62.44g/mol

b)

116.40g/mol

c)

133.33g/mol

d)

97.89g/mol

37.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
38.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
39.
How many molecules of sugar (C6H12O6) are in a mole?
a)

24 molecules

b)

180 molecules

c)

180 g

d)

6.022 x 1023 molecules

40.
Find the percent composition of hydrogen in (NH4)2S.
a)

11.9%

b)

41.1%

c)

47.1%

41.
How many moles are in 19.82 g Mg? 
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
 0.8156 mol Mg
42.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.050 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
43.
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?
a)
12.0 mol C
b)
12.0 mol Ca
c)
They are equal
44.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
45.
Which of the following would have the highest number of moles?
a)
4g CO2
b)
15g H2O
c)
22g NaCl
d)
100g AgCl
46.

What is the electronic geometry for two electron domains?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

trigonal bipyramidal

e)

octahedral

47.

What is the ideal bond angle between two electron domains?

a)

90

b)

109.5

c)

120

d)

180

48.

What is the electronic geometry for three electron domains?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

trigonal bipyramidal

e)

octahedral

49.

What is the ideal bond angle between three electron domains?

a)

90

b)

109.5

c)

120

d)

180

50.

What is the molecular geometry for two bonded domains with one lone pair?

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

51.

What is the electronic geometry for four electron domains?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

trigonal bipyramidal

e)

octahedral

52.

What is the ideal bond angle between four electron domains?

a)

90

b)

109.5

c)

120

d)

180

53.

What is the molecular geometry for three bonded domains with one lone pair?

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

54.

What is the molecular geometry for two bonded domains with two lone pairs?

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

55.

How many electron domains are in the partial Lewis structure?

a)

2

b)

4

c)

6

d)

3

56.

How many electron domains are in the partial Lewis structure?

a)

2

b)

4

c)

6

d)

3

57.

How many electron domains are in the partial Lewis structure?

a)

2

b)

4

c)

6

d)

3

58.

How many electron domains are in the partial Lewis structure?

a)

1

b)

5

c)

2

d)

3

59.

How many electron domains are in the partial Lewis structure?

a)

1

b)

5

c)

2

d)

3

60.

How many electron domains are in the partial Lewis structure?

a)

1

b)

5

c)

2

d)

3

61.
In covalent bonds, electrons are ___________.
a)
transferred
b)
gained
c)
lost
d)
shared
62.

What molecular geometry will this molecular structure have?: H2S

a)

bent

b)

tetrahedral

c)

linear

d)

trigonal pyramidal

63.

What two types of atoms make a covalent bond?

a)

2 Nonmetals

b)

1 Nonmetal and 1 Metal

c)

2 Metals

d)

2 Noble Gases

64.

Choose the correct molecular geometry for this molecule:

a)

Trigonal planar

b)

Trigonal pyramidal

c)

Tetrahedral

d)

Linear

65.

Choose the correct molecular geometry for this molecule:

a)

Trigonal planar

b)

Trigonal pyramidal

c)

Bent

d)

Tetrahedral

66.

Choose the correct molecular geometry for this molecule:

a)

Tetrahedral

b)

Trigonal pyramidal

c)

Bent

d)

Trigonal planar

67.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
68.

What molecule could this be? (The purple cloud represents a lone pair of electrons.)

a)

H2O

b)

NH3

c)

CO2

d)

CH4

69.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
70.

The geometry of a molecule with 3 bonded pairs of electrons and 0 lone pairs of electrons on the central atom

a)

Tetrahedral

b)

Trigonal Planar

c)

Bent

d)

Trigonal Pyramidal

e)

Linear

71.

What is the molecular geometry of CO2?

a)

Bent

b)

Trigonal planar

c)

Trigonal pyramidal

d)

Linear

72.
In a polar covalent bond, electrons are shared ___________.
a)
equally
b)
unequally
c)
between non-metals with similar electronegativities
d)
between a metal and a non-metal
73.
In this Lewis structure, the symbol above F means...
a)
electrons are being transferred to Fluorine
b)
electrons are less attracted to F than H
c)
electrons are more attracted to F than H
d)
Fluorine has formed a cation
74.

Classify the following molecule.

a)

polar

b)

nonpolar

75.

The electronegativity difference in the bonds of CCl4 (carbon tetrachloride) is:

a)

0.4

b)

0.61

c)

0.51

d)

6.1

76.

When you have Li-O, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

77.

When you have Si-O, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

78.

When you have F-F, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

79.

Which molecule has a non-polar covalent bond?

a)

H2

b)

NH3

c)

H2O

d)

HCl

80.
A molecule containing polar covalent bonds is always polar.
a)
True
b)
False
81.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

82.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

83.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

84.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

85.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

86.

Is this a polar or nonpolar molecule?

a)

Polar

b)

Nonpolar

87.

Which atom has the negative dipole in this molecule?

a)

Hydrogen

b)

Fluorine

c)

Neither

88.

In this bond, we should label the S end of the bond with...

a)
b)

electrons are less attracted to F than H

c)

Nothing, they make a nonpolar bond

89.

In this bond, we should label the Cl end of the bond with...

a)
b)

electrons are less attracted to F than H

c)

Nothing, they make a nonpolar bond

90.

In this bond, we should label the P end of the bond with...

a)
b)

electrons are less attracted to F than H

c)

Nothing, they make a nonpolar bond

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