HW 1 key - a 2 C 2 H 6 7 O 2 → 4 CO 2 6 H 2 O b 4 NO O 2...

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CHE-105 – Exploring Chemistry Chapter 1 Homework 1. Classify each as element, compound, homogeneous mixture or heterogeneous mixture. a. pure water compound b. air homogeneous mixture c. argon element d. carbon dioxide compound e. lemonade heterogeneous mixture f. concrete heterogeneous mixture g. brass homogeneous mixture 2. Classify each of the following as atom or molecule. a. nitrogen molecule b. oxygen molecule c. argon atom d. water molecule e. carbon monoxide molecule 3. Which elements belong in the same family as neon? a. hydrogen b. helium c. nitrogen d. radon e. carbon 4. Which elements belong to the same period? a. He, Ne and Xe b. K, Cr, Br c. Mg, Ca, Zn d. Al, Ge, Ga e. both b and c 5. Give the proper name for the following compounds. a. KCl potassium chloride b. CS 2 carbon disulfide c. CaCl 2 calcium chloride d. N 2 O 3 dinitrogen trioxide e. Pb lead 6. What are the four most prevalent components of dry air? Nitrogen, oxygen, argon and carbon dioxide 7. Balance the following chemical equations.
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Unformatted text preview: a. 2 C 2 H 6 + 7 O 2 → 4 CO 2 + 6 H 2 O b. 4 NO + O 2 + 2 H 2 O → 4 HNO 2 8. How many of each atom is present in the following compounds? a. NaCl 1 Na and 1 Cl b. HNO 3 1 H, 1 N and 3 O c. H 2 O 2 H and 1 O d. Na 2 CO 3 2 Na 1 C and 3 O e. Ca(NO 3 ) 2 1 Ca, 2 N and 6 O f. N 2 2 N 9. What are the three regions of the atmosphere? Troposphere, stratosphere and mesosphere 10. List five types of air pollution and a source for each. CO 2 combustion of wood, natural gas, gasoline, fermentation CO combustion of wood, coal, natural gas … SO x combustion of coal, volcanoes Rn from soil, radioactive decay NO x combustion in the presence of air (oxygen and nitrogen) PM pollen, construction, cigarette smoke, break pads O 3 UV light from sun, Xerox machines, lightning VOC gasoline, solvents for cleaning and diluting...
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This note was uploaded on 04/18/2008 for the course CHE 105 taught by Professor Duecker during the Spring '08 term at Indiana Wesleyan.

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HW 1 key - a 2 C 2 H 6 7 O 2 → 4 CO 2 6 H 2 O b 4 NO O 2...

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