CHEM 1250 Study Guide - Quiz Guide: Carbon Tetrachloride, Scientific Notation, Sodium Bromide
Dr. Zellmer Chemistry 1250 Wednesday
Time: 30 mins Spring Semester 2016 January 27, 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 change.
a) carbon reacts with chlorine to produce carbon tetrachloride
b) water vapor condenses on a cold window
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.
(4.1105 m2) (64.84 kg - 57.0945 kg)
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=
4.502 x 10!3 s
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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184
74W
3+
74
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Copyright R. J. Zellmer, January 27, 2016
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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 change: carbon reacts with chlorine to produce carbon tetrachloride, water vapor condenses on a cold window. 2. (4 pts) perform the following mathematical operation and report your answer to the correct number of significant figures. Include units. (4. 1105 m2) (64. 84 kg - 57. 0945 kg) 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 mercury, hg, in the air in a room on a particular day is 1. 55 x 10!4 kg/m3. What volume of air (in ft3) contains 4. 90 x 10!4 lb of mercury? (1. 000 lb = 453. 6 g, 1 in = 2. 54 cm) (you must use dimensional analysis (factor unit method) to receive full credit!)
