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F03_E1 - ID Number(LAST six digits only Chemistry 111 Page...

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ID Number: _____ _____ - _____ _____ _____ _____ (LAST six digits only!) Chemistry 111 September 11, 2003 Page 1. (28 pts) Page 2. (17 pts) Page 3. (22 pts) Page 4. (18 pts) Page 5. (16 pts) Total: (100 pts)
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Chemistry 111 Page 1 out of 7 Exam I / Fall 2003 ID Number: _____ _____ - _____ _____ _____ _____ Show all your work in order to receive any credit at all! 1. Name the following compounds. Spelling counts. (02 pts each) a) Ca(MnO 4 ) 2 _________________________________ b) P 4 O 6 _________________________________ 2. How many hydrogen atoms are there in a 2.34 g sample of phosphoric acid (H 3 PO 4 , MW = 97.99)? (08 pts) Answer: _________________________________ 3. A 50.0 mL solution of K 3 PO 3 is prepared to be 2.00 M. How many moles of K 3 PO 3 are present in that solution? (06 pts) Answer: _________________________________ 4. The empirical formula for a certain compound is CH 2 O. If you determine during a colligative properties experiment that the molecular weight of this compound is 180.1, what would be its molecular formula? (04 pts) Answer: _________________________________ 5. How many protons, neutrons, and electrons are there in one isotope of 58 Mn +2 ? (06 pts) Answer: ________ protons, ________ neutrons, and ________ electrons.
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