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A chemistry exam consisting of 12 questions. The questions cover various topics including atomic structure, molecules and compounds, physical and chemical changes, and chemical formulas. Students are required to complete tables, describe concepts, classify substances, and perform calculations.
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Chem 111 Exam IB S07 Dr. Macintosh Name (please print): SHOW ALL WORK INCLUDING UNIT CANCELLATIONS. USE PROPER NUMBER OF SIG FIGS. READ THE QUESTIONS CAREFULLY AND ANSWER THEM COMPLETELY.
symbol name protons neutrons electrons (^35) Cl
Strontium-
(6) Describe how the terms molecule and compound are different.
(6) Classy each of the following as a physical or chemical change? (a) A piece of aluminum metal develops a white coating over time. _____________
(b) Sodium chloride is electrolyzed to produce sodium metal and chlorine gas. __________
(c) A purple vapor appears in a vial containing iodine. ___________
(a) 4th^ period halogen __________
(b) 3rd^ period alkaline earth ____________
(c) a nonmetal in the 3 rd^ period ______________
(a) ammonium nitrate
(b) manganese(II) chloride
(c) potassium sulfide
(a) seawater
(b) soil
(c) a glass of ice tea with ice cubes
(12) A small hole in the wing of a space shuttle requires a 17.7 cm^2 patch. What is the patch’s area in km^2?
(10) The speed of light in a vacuum is 2.998 × 10^8 m/s. What is its speed in km/h?
(6) Name the following compounds using the correct systematic method
(a) CuBr (^2)
(b) K 2 CO 3
(c) CaSO 4