CHEM 1250 Study Guide - Quiz Guide: Scientific Notation, Unified Atomic Mass Unit, Dimensional Analysis
Dr. Zellmer Chemistry 1250 Monday
Time: 30 mins Spring Semester 2016 January 25, 2016
Quiz I
Name Lab TA/time
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Show ALL your work or EXPLAIN to receive full credit.
1. (2 pts) Indicate whether each of the following is a physical or chemical property.
a) iron freezes at 1535EC
b) hydrogen combines with sulfur in the air
2. (4 pts) Perform the following mathematical operation and report your answer to the correct
number of significant figures. Report your answer in scientific notation. Include units.
1.3577 x 103
J
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)))))))))
=
(0.3755 g) x (36.75
o
C - 27.105
o
C)
3. (2 pts) Fill in the blanks in the table below for the isotopes indicated.
Symbol number of number of number of atomic mass
protons neutrons electrons number number
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63
29Cu
+
63
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Copyright R. J. Zellmer, January 25, 2016
OVER ...
Document Summary
Show all your work or explain to receive full credit. 1. (2 pts) indicate whether each of the following is a physical or chemical property: iron freezes at 1535ec, hydrogen combines with sulfur in the air. 2. (4 pts) perform the following mathematical operation and report your answer to the correct number of significant figures. 1. 3577 x 103 j (0. 3755 g) x (36. 75oc - 27. 105oc) 3. (2 pts) fill in the blanks in the table below for the isotopes indicated. Symbol number of protons number of neutrons number of electrons atomic number mass number. 4. (6 pts) the amount of co2 in the air on a particular day is 1. 55 x 10!4 kg/m3. How many pounds (lbs) of co2 are in 5. 00 ft3 of air? (1. 000 lb = 453. 6 g, 1 in = 2. 54 cm) (you must use dimensional analysis (factor unit method) to receive full credit!)
