EXAM 1
CHEMISTRY 224
FEBRUARY 11, 2010
1. Read the following instructions carefully
2. Write your name and Purdue ID number on the answer sheet
3. Write your Graduate Instructor’s name on the line for “Instructor” on the answer sheet
4. Use a #2 pencil to
code
all information on the answer sheet.
5.
Code
your name and Purdue ID number on the answer sheet
6.
Code
0224 as the “Section number” on the answer sheet.
7.
Code
the one best
answer to each question on the answer sheet.
THERE ARE 20 QUESTIONS. CHECK NOW TO BE SURE THAT YOUR EXAM
INCLUDES ALL 20 QUESTIONS. EACH QUESTION IS WORTH TEN (10) POINTS
(200 POINTS TOTAL)
YOU ARE SUPPOSED TO KNOW (REMEMBER) A NUMBER OF BASIC
EQUATIONS.
ADDITIONAL FORMULAS AND STATISTICAL TABLES ARE
INCLUDED AT THE END OF THE EXAM.
WE STRONGLY SUGGEST THAT
YOU CHECK THE REFERENCE SECTION AT THE END OF THIS BOOKLET
BEFORE YOU START WORKING ON THE EXAM.
ATENTION: SOME OF THE QUESTIONS THAT LOOK LIKE THEY
REQUIRE COMPLEX CALCULATIONS CAN ACTUALLY BE ANSWERED BY
USING SIMPLE REASONING AND INTUITION.
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1.
Alice prepared stock solution of NaCl (concentration 2 mM) and poured 100 ml of this
solution into a clean Erlenmeyer flask. What is the mass of Na contained in the flask?
Molar mass of Na is 23 g/mol, molar mass of Cl is 35.5 g/mol
a.
11.7 mg
b.
117 mg
c.
7.1 mg
d.
2.3 mg
e.
4.6 mg
2.
A spectrophotometer was accidentally pushed from the bench and fell on the floor.
Predict the consequences.
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 Fall '08
 ScottMcLuckey
 Chemistry, Normal Distribution, Standard Deviation, a. b. c., b. c. d., Student Alice Bob Carol Don Emma Intercept

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