F04_E1 - ID Number(LAST six digits only Chemistry 111 Page...

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ID Number: _____ _____ - _____ _____ _____ _____ (LAST six digits only!) Chemistry 111 September 09, 2004 Page 1. (30 pts) Page 2. (18 pts) Page 3. (34 pts) Page 4. (21 pts) Total: (100 pts)
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Chemistry 111 Page 1 out of 6 Exam I / Fall 2004 ID Number: _____ _____ - _____ _____ _____ _____ Show all your work in the space provided in order to receive any credit at all! 1. Which of the following is the formula for potassium permanganate? (02 pts) a) PMnO 2 . b) KMnO 2 . c) PMnO 4 . d) KMnO 4 . e) K 2 MnO 4 . 2. Name the following compound: SO 3 . _________________________________ (02 pts) 3. A certain sample of carbon graphite has 3.21 × 10 22 carbon atoms. What is the mass of this sample? (06 pts) Answer: _________________________________ 4. How many oxygen atoms are there is a 22.22 g sample of Na 2 CO 3 (MW = 105.98)? (08 pts) Answer: _________________________________ 5. An isotope of Calcium has a mass number of 45 and a charge of +2. This isotopic ion has ______ electrons, ______ protons, and ______ neutrons. (06 pts) 6. When the following operation is performed properly, we end up with ________ significant figures in the answer. (03 pts) 1111- 1020.000 222.222 #0.003210 7. When you balance the combustion reaction of C 4 H 10 O 2 without fractional coefficients, the coefficient for O 2 would be… ________. Show balanced reaction below. (03 pts)
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This note was uploaded on 02/08/2010 for the course CHEM 111 taught by Professor Kenney during the Spring '08 term at Case Western.

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F04_E1 - ID Number(LAST six digits only Chemistry 111 Page...

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