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