121quiz2Rans

121quiz2Rans - sulfur with 4.5 g of fluorine is _____g....

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Quiz 2 Dr. Heyns Chemistry 121 Thursday Autumn Quarter 2006 October 12, 2006 Time: 20 min Points: 30 Name of student:__________________________________ Name of TA:______________________________________ 1. (5 pts) When the following equation is balanced, the coefficient of O 2 is ______. C 2 H 4 O (g) + O 2 (g) → CO 2 (g) + H 2 O (g) a) 2 b) 3 c) 4 d) 5 e) 1 2. (7 pts) What is the empirical formula of a compound that contains 49.4% K, 20.3% S, and 30.3% O by mass? a)KSO 2 b) KSO 3 c) K 2 SO 4 d) K 2 SO 3 e) KSO 4 3. (7 pts) Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride. S (s) + 3F 2 (g) → SF 6 (g) The maximum amount of SF 6 that can be produced from the reaction of 3.5 g of
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Unformatted text preview: sulfur with 4.5 g of fluorine is _____g. (Check for a limiting reagent!) a) 12 b)3.2 c) 5.8 d)16 e) 8.0 1 4. (6 pts) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide. 2Mg (s) + O 2 (g) → 2MgO (s) When 4.00 g of magnesium burns, the theoretical yield of magnesium oxide is ___ g. a) 4.00 b) 6.63 c) 0.165 d) 3.32 e) 13.3 5. (5 pts) Which of the following are decomposition reactions? 1) CH 4 (g) + O 2 (g) → CO 2 (g) + H 2 O (l) 2) CaO (s) + CO 2 (g) → CaCO 3 (s) 3) Mg (s) + O 2 (g) → MgO (s) 4) PbCO 3 (s) →PbO (s) + CO 2 (g) a) 1, 2, and 3 b) 4 only c) 1,2,3, and 4 d) 2 and 3 e) 2, 3, and 4 2...
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This note was uploaded on 05/14/2009 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

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121quiz2Rans - sulfur with 4.5 g of fluorine is _____g....

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