CHE103-EXAMIII-practice1

CHE103-EXAMIII-practice1 - Name _ Chemistry 103 Spring 08...

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Name ______________________________ Chemistry 103 Spring ‘08 EXAM III 100 points (RED HIGHLIGHTED PROBLEMS – CONTENT NOT ON F08 EXAM III) 1. (8points/1pt each coefficient) Balance the following chemical equations: _____ As 4 S 6 (s) + ______ O 2 (g) -------- ______ As 4 O 6 (s) + ______SO 2 (g) _____ C 2 H 6 (g) + ______ O 2 (g) ------- ______CO 2 (g) + ______ H 2 O(g) 2. (24 points/8 points each) a. How many moles of iodine (I 2 ) are required to react with 27.0 grams of nitrogen (N 2 ) when the reaction yields Nitrogen triiodide (NI 3 ). b. A diver exhales a bubble with a volume of 250. mL at a pressure of 2.42 atm and a temperature of 15. o C. What is the volume of the bubble when it reaches the surface where the pressure is 1.00 atm and the temperature is 27. o C?
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According to the following reaction, 7.00g of Al reacts with excess H 2 SO 4 . What volume of H 2 gas is produced at STP? 2Al(s) + 3H 2 SO 4 (aq) -------- Al 2 (SO 4 ) 3 (aq) + 3H 2 (g) 3. Empirical/Molecular Formula (10 points) Oleic acid, a component of olive oil, is 76.54%C, 12.13%H, and the remainder O. The experimental value of the molar mass is approximately 282 grams. What is the
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CHE103-EXAMIII-practice1 - Name _ Chemistry 103 Spring 08...

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