Chem Final Course Assessment

Chem Final Course Assessment - 1.(Points:4.17) A pure...

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1.  (Points: 4.17)      A pure substance composed of two or more different elements is a.  a homogeneous mixture b.  a heterogeneous mixture c.  a polyelement d.  an atom e.  a compound   Save Answer     2.  (Points: 4.17)      Some compounds are composed of electrically charged atoms or groups of atoms called a.  protons b.  electrons c.  neutrons d.  ions e.  molecules   Save Answer     3.  (Points: 4.17)      Which three elements are likely to have similar chemical and physical properties? a sodium, lithium, and potassium b.  sodium, magnesium and aluminum
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c.  nitrogen, oxygen and neon d.  nickel, copper and zinc e.  uranium, plutonium and americium   Save Answer     4.  (Points: 4.17)      Acetylsalicylic acid, commonly known as aspirin, has 9 carbon atoms, 8 hydrogen atoms, and 4 oxygen atoms per molecule. What is the molecular formula of aspirin? a. C9He8O4 b. C9H8O4 c. C9H8Ox4 d. Ca9H8O2 e. C9(HO4)2   Save Answer     5.  (Points: 4.17)      What alkali metal is the fourth period (going across) of the periodic table? a.  Ca b.  K c.  Na d.  Sr e.  Sc   Save Answer    
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6.  (Points: 4.17)      What atom is a halogen and is most likely to form a 1- ion? a.  I b.  S c.  Ag d.  P e.  Na   Save Answer     7.  (Points: 4.17)      The combustion of propane produces carbon dioxide and steam: C 3 H 8 (g) + 5 O 2 (g) = 3 CO 2 + 4 H 2 O(g) All of the following are correct EXCEPT a.  Three molecules of carbon dioxide are formed per one molecule of propane consumed. b. 
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This note was uploaded on 02/21/2011 for the course CHEM 181 taught by Professor Tambero during the Spring '10 term at Ocean County College.

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Chem Final Course Assessment - 1.(Points:4.17) A pure...

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