806752
Frage 1
Frage
A molecule with a slight charge is?
Antworten
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ion
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dipole
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VSEPR
Frage 2
Frage
Mrs. G in her home lab made 444.0 grams of chocolate butter cream icing. Between licking the spoon only 404.0 grams made it on the cake. What is the percent yeild of icing actually on the cake.
Antworten
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90.99%
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109.9%
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9.009%
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91%
Frage 3
Frage
The quantitive study of a chemical reaction is?
Antworten
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hydrates
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stoichometry
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molecular formula
Frage 4
Frage
CBr4 has the shape and angles of which molecular geometry?
Antworten
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pyramidal, 109 degrees
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tetrahedral, 109.5 degrees
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bent, 109 degrees
Frage 5
Frage
An ionic bond is associated with which of the following?
Antworten
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equal sharing of electrons
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unequal sharing of electrons
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the transfer of electrons
Frage 6
Frage
A covalent bonding is?
Antworten
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give and take of electrons
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sharing of electrons
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sharing of neutrons
Frage 7
Frage
How many non binding electron pairs are present in water?
Antworten
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0
-
1
-
2
-
4
Frage 8
Frage
The limiting reagent is the reagent that is used up______.
Antworten
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last
-
second
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first
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in excess
Frage 9
Frage
The correct ionic charge (oxidation number) for sulfate ion is?
Antworten
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1+
-
2+
-
1-
-
2-
Frage 10
Frage
WHich of the following pairs of elements would form a covalent bond?
Antworten
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Sulfer and Oxygen
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Calcium and Fluorine
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calcium and Iodine
Frage 11
Frage
The correct ionic charge (oxidation number) for calcium ion is....
Antworten
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1+
-
2+
-
1_
-
2-
Frage 12
Frage
Formation of a positive ion is the result of an atom:
Antworten
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losing one or more protons
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gaining one or more protons
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losing one or more electrons
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gaining one or more electrons.
Frage 13
Frage
The mechanism for ionic bond formation always involves the transeferring of
Antworten
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Electrons from non metal atoms to metal atoms
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Electrons from metal to metal atom.
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Electrons from metal atom to non metal atom
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Electrons from non metal atom to non metal atom
Frage 14
Frage
For Group VA element, choose the appropriate number of valence electrons present-
Antworten
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1 valence electrons
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5 valence electrons
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3 valence electrons
Frage 15
Frage
Which pair of electrons has the greatest repulsion?
Antworten
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non binding and non binding
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bonding and bonding
Frage 16
Frage
electronegativity increases-
Antworten
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down and to the right
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up and to the right
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down and to the left
Frage 17
Frage
Calculate the weight in grams of 15.5 moles of oxygen
Antworten
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172g
-
.969g
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248g
-
496g
Frage 18
Frage
Elements in groups 2A and 7A of the periodic table would respectively be expected to form ions with charges of:
Antworten
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+2 and +7
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-2 and -7
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+2 and +1
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+2 and -1
Frage 19
Frage
The "octet rule" relate to the number eight because:
Antworten
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Only atoms with 8 valence electrons undergo chemical reaction
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Ions with charges +8 and -8 are stable
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Atoms react to form compounds so that they contain 8 electrons in their outer shell.
Frage 20
Frage
For representative elements, valence electrons are those electrons located:
Antworten
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closest to the nucleus
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in the outermost shell
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in the outermost subshell
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in s orbitals
Frage 21
Frage
Which of the following sets of elements is arranged in order of decreasing electronegativity?
Antworten
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O, S, As
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Si, B , Cl
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Br, Cl, P
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