ID Number:
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(LAST six digits only!)
Chemistry 111
September 11, 2003
Page
1.
(28 pts)
Page
2.
(17 pts)
Page
3.
(22 pts)
Page
4.
(18 pts)
Page
5.
(16 pts)
Total:
(100 pts)
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Chemistry 111
Page
1
out of 7
Exam I / Fall 2003
ID Number:
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Show all your work in order to receive any credit at all!
1. Name the following compounds.
Spelling counts.
(02 pts each)
a) Ca(MnO
4
)
2
_________________________________
b) P
4
O
6
_________________________________
2.
How many hydrogen atoms are there in a 2.34 g sample of phosphoric acid (H
3
PO
4
, MW =
97.99)?
(08 pts)
Answer:
_________________________________
3. A 50.0 mL solution of K
3
PO
3
is prepared to be 2.00 M.
How many moles of K
3
PO
3
are
present in that solution?
(06 pts)
Answer:
_________________________________
4.
The empirical formula for a certain compound is CH
2
O.
If you determine during a colligative
properties experiment that the molecular weight of this compound is 180.1, what would be its
molecular formula?
(04 pts)
Answer:
_________________________________
5.
How many protons, neutrons, and electrons are there in one isotope of
58
Mn
+2
?
(06 pts)
Answer:
________ protons,
________ neutrons, and ________ electrons.