Chem_6A_Quiz_3_key_Sect_E09_E04_E05

Chem_6A_Quiz_3_key_Sect_E09_E04_E05 -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: QUIZ
3
E09/E04/E05
 Section
E____
 
 
 NAME
(Last,
First):
____KEY___________________
 Your
signature:
_____________________________
 Chemistry
6A
Fall
2008
 UCSD
PID:
|A|__|__|__|__|__|__|__|__|
 Total
Points:
_______
/
20
 
 
 
 You
have
10
minutes
to
complete
this
quiz.
Please
show
all
your
work,
but
write
the
 answers
in
the
designated
spaces.
The
points
allotted
for
each
question
are
indicated
in
 parenthesis.
 
 Potentially
Helpful
Constants:

 Potentially
Helpful
Equations:
 
 
 Mass
of
electron,
me
=
9.10938
x
10‐31
kg
 EK
=
½mv2
 Mass
of
proton,
mp
=
1.67262
x
10‐27
kg
 







 Mass
of
neutron,
mn
=
1.67493
x
10‐27
kg
 
 Fundamental
charge,
e
=
1.60218
x
10‐19
C
 c
=
νλ
 g
=
9.80665
m•s‐2
 8
m•s‐1
 E=
hν
 c
=
2.99792
x
10 λparticle
=
h(v)
 h
=
6.62608
x
10‐34
J•s
 Etot
=
Ek
+
EФ
 
 =
(1( 1))2−
1( 2))2)
 
 
 Potentially
Helpful
Conversion
Factors:
 1
J
=
1
N•m
 1
N
=
1
kg
m
s‐2
 1
L
=
103
cm3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1.

Write
plausible
Lewis
structures
for
the
following
molecules
(6pts):
 
 
 
 Total
#
of
 Lewis
Structure
 
#
of
 #
of
 Valence
 Bond
 Lone
 Electrons
 Pairs
 Pairs
 (a)NI3
 
 
 
 
 26
 3
 10
 
 (b)OCS
 16
 4
 4
 
 
 (c)NH4Br
 
 
 
 
 16
 5
 3
 
 2.

Give
the
chemical
formulas
or
chemical
name
for
(4pts):

 
 (a)

Iron
(II)
Chloride
 





_________
 
 FeCl2_____________________
 (b)

SeF6




































__Selenium
hexafluoride
____________








 (c)

Aluminum
hydroxide



__________Al(OH)3________________________
 (d)
CaSO4
•7H2O




















____Calcium
Sulfate
heptahydrate___
 
 
 3. a. Rank the following compounds by on ionic bond strength (based on Coulombic forces) from weakest to strongest (5pts): MgO, BaO, NaCl, CaO, CsCl _CsCl_ < _NaCl_ < _BaO_ < _CaO_ < _MgO_ 
 
 
 
 
 
 b. Rank the cations in part (a) based on Ionization Energy, Electron Affinity, and Atomic Radius (from smallest to largest) (3pts)
 
 
 
 Ionization
Energy:




_Cs_
<
_Na_
<
_Ba_
<
_Ca_<
_Mg_
 
 
 
 
 Electron
Affinity*:





_Mg_
<
_Ca_
<
_Ba_
<
_Cs_<
_Na_
 
 
 
 
 (*note:
does
not
follow
general
trend)
 Atomic
Radius:









_Na_
<
_Mg_
<
_Ca_
<
_Ba_<
_Cs_
 
 
 
 4.

Write
complete
Lewis
Structures
for
one
of
the
following
compounds.
Please
 circle/indicate
which
structure
you
would
like
graded.
(2pts):
 
 a. 
Barium
Sulfide
 
 
 
 
 
 
 
 
 
 b. 
Methanol
(CH3OH)
 
 
 
 
 
 
 
 
 
 

 
 c. 
Lithium
Chloride
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 ...
View Full Document

Ask a homework question - tutors are online