CHE 141 Hw upto October 1

# CHE 141 Hw upto October 1 - Maksuda Khatoon September 25,...

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Maksuda Khatoon September 25, 2007 CHE 141 Jonathan Patete 3.6 End of Chapter 3/ # 68, 72, 82, 86, 94 68. The production of capacity for acrylonitrile (C 3 H 3 N) in the United States is over 2 million pounds per year. Acrylonitrile, the building block for polyacrylonitrile fibers and a variety of plastics, is produced from propylene, ammonia, is oxygen: 2C 3 H 6 (g) + 2NH 3 (g) + 3O 2 (g) 2C 3 H 3 N(g) + 6H 2 0(g) a. What mass of acrylonitrile can be produced from a mixture of 1.00 kg of propylene, 1.50 kg of ammonia, and 2.00 kg of oxygen? b. What mass of water is produced, and what masses of which starting materials are left in excess? 72. A binary compound created by the reaction of an unknown element E and hydrogen contains 91.27% E and 8.73% H by mass. If the formula of the compound is E 3 H 8 , calculate the atomic mass of E. 82. In using a mass spectrometer, a chemist sees a peak at a mass of 30.0106. Of the choices 12 C 2 1 H 6 , 12 C 1 H 2 16 O, and 14 N 16 O, which is responsible for this peak? Pertinent masses are 1 H, 1.007825; 16 O, 15.994915; and 14 N, 14.003074. 86. A .200-g sample of protactinium (IV) oxide is converted to another oxide of protactinium by heating in the presence of oxygen to give .2801 g of the new oxide, Pa x O y . Determine the values of X, and Y. 94. Consider a 5.430 g mixture of FeO and Fe

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## This note was uploaded on 02/18/2010 for the course PSY 101 taught by Professor La during the Spring '08 term at SUNY Stony Brook.

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CHE 141 Hw upto October 1 - Maksuda Khatoon September 25,...

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