Exam2 - CHEM 131 - Dr. Eichhorn Fall 2005 - Exam II October...

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CHEM 131 - Dr. Eichhorn Name_____________________________________ Fall 2005 - Exam II October 21, 2005 1. (2pts) circle your correct section # and discussion time. 3517 (Tu 3:30) 3522 (Th 12:30) 3537 (Th 3:30) 3518 (Tony, Tu 3:30) 3527 (Th 2:00) 3541 (Th 2:00) 3518 (Oktay, Tu 3:30 3531 (Tu 12:30) 3521 (Th 12:30) 2. (2 pts each) Give the names for the following compounds: a) Na(ClO 4 ) ______________________________ b) NH 4 OH ______________________________ 3. (2 pts each) Give the formula for the following ions and compounds: a) acetic acid _______________ b) chromium(III) hydroxide _______________ 4. (2 pts each) Give the electronic configurations for the following atoms and ions (You may use the noble gas abbreviations where appropriate). a) Cu b) P 3- c) C 2+
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5. (10 pts) A Silane contains 90.31 % silicon and 9.69 % hydrogen by mass. The compound has a molar mass of 62 g/mol. Determine the compound’s empirical and molecular formula. SHOW YOUR WORK. Empirical formula _____________
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Exam2 - CHEM 131 - Dr. Eichhorn Fall 2005 - Exam II October...

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