Fall_2003_Midterm

Fall_2003_Midterm - Page 3 of 7 Print Name : MULTIPLE...

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Page 3 of 7 Print Name : MULTIPLE CHOICE. [4 points each] Circle your response(s) to the questions numbered 1 through 6. 1. All atoms of a given element have the same___________________ . a. mass b. number of protons c. density d. atomic mass number e. none of the above 2. Which species (one or more) can be found on the earth’s crust? a. CaCO 3 b. Mg 3 (CO 3 ) 2 c. Cl d. Au 3. Which sample contains the fewest atoms: a. a teaspoon full of water b. 0.1 grams of salt c. one billion molecules of sucrose (sugar) d. a mole of Xenon e. a baseball bat 4. Indicate which species (one or more) will dissolve in water: a. hydrogen peroxide b. octane c. lithium chlorate d. barium sulfate e. ammonia (NH 3 ) 5. In the reaction Ca (s) + FeS (s) . CaS (s) + Fe (s) the oxidant (oxidizing agent) and reductant (reducing agent) are, respectively, a. Ca and Fe b. Fe and Ca c. Ca and S d. S and Ca e. none of the above
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6. Gallium has two naturally occurring isotopes, 69 Ga and 71 Ga, with masses of 68.9257 amu and 70.9249 amu, respectively. What is the percent abundance of
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Fall_2003_Midterm - Page 3 of 7 Print Name : MULTIPLE...

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