Chemistry Term 1 Review Worksheet With Answers Page 10
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17Chem term # 1 review sheet
83. Given the electron dot formula:
89. Which electron dot diagram represents a molecule that has a
..
polar covalent bond?
:
:
H
X
..
Which atom represented as X would have the least attraction for
A.
B.
the electrons that form the bond?
C.
D.
A. F
B.
Cl
C.
I
D. Br
84. A student determined in the laboratory that one mole of KMnO
4
had a mass of 171.54 grams. The mass of one mole of KMnO
4
in an accepted chemistry reference is 158.04 grams. What is the
90. Which electron-dot formula represents a substance that contains
percent error of the mass of one mole of KMnO
as determined
4
a nonpolar covalent bond?
by the student?
A.
B.
A. 0.787%
B.
7.87%
C.
8.54%
D. 13.5%
C.
D.
85. In an experiment the gram atomic mass of magnesium was
determined to be 24.7. Compared to the accepted value 24.3,
the percent error for this determination was
A. 0.400
B.
1.65
C.
24.7
D. 98.4
91.
Which electron-dot symbol represents an atom of argon in the
ground state?
86. A student determined the melting point of a substance to be
55.2 C. If the accepted value is 50.1 C, the percent error in her
A.
B.
C.
D.
determination is
A. 5.10
B.
9.24
C.
10.2
D. 12.0
92. Which electron-dot structure represents a nonpolar molecule?
87.
Which is the correct electron dot representation of an atom of
sulfur in the ground state?
A.
B.
.
..
..
.
.
:
:
:
:
:
A.
S
B.
S
C.
S
D.
S
.
..
C.
D.
88. Which is the electron dot symbol of an atom of boron in the
ground state?
.
.
.
.
.
.
:
:
:
A.
B
B.
B
C.
B
D.
B
.
page 10
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