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Quiz 4 - Chem 1721/1821 Name Quiz 2(25 points 1 February 6...

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Chem 1721/1821 Name ___________________________________ Quiz 2 (25 points) February 6, 2014 C = kP N A = 6.022 x 10 23 mol 1 1. Which of the following correctly matches a class of solids with a characteristic property? Circle the one best answer. a. ionic solids - malleable and ductile c. metallic solids - good conductors b. covalent-network solids - low melting point d. molecular solids - high melting point 2. Consider the pictures of unit cells shown below to answer questions a - c : A B C a. What fraction of a particle on the corner of unit cell A is inside of the unit cell? __________________ b. How many atoms are contained inside unit cell B ? __________________ c. Which unit cell { A , B , or C } has particles that touch along the body diagonal? __________________ 3. Indicate whether each of the following substances should have greater solubility in ethanol (C 2 H 5 OH), or pentane (C 5 H 12 ). a. XeF 4 ___________________ b. PCl 3 ___________________ c. a biologically active compound that is fat soluble (i.e. lipophilic ) ___________________ 4. Multiple choice - circle the one best answer for each of the following.
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