In the complete combustion of octane with oxygen represented by the unbalanced

In the complete combustion of octane with oxygen

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15. In the complete combustion of octane with oxygen, represented by the unbalanced chemical equation, C8H18+ O2----> CO2+ H2O one gram of octane will yield what mass of water? (A) 0.079 g (B) 1.4 g (C) 18 g (D) 162 g 16. The first chemical compound of a rare gas element was prepared in 1962. Since then several such compounds have been prepared and characterized. What is the empirical formula of a compound of Xe which is 67.2% Xe and 32.8% O by mass? 17. The commercial production of phosphoric acid from phosphate ores can be represented by the equation
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Ca3(PO4)2+ 3 SiO2+ 5 C + 5 O2+ 3H2O ---> 3 CaSiO3+ 5 CO2+ 2 H3PO4. If 1.0 kg. each of calcium phosphate and silica are used with sufficient excess of carbon, oxygen, and water, what quantity of phosphoric acid can be produced? 18. A power company burns approximately 474 tons of coal per day to produce electricity. If the sulfur content of the coal is 1.30% by weight, how many tons of SO2are dumped into the atmosphere each day? 19. A 50.0 mL aliquot of a sulfuric acid solution was treated with barium chloride and the resulting BaSO4was isolated and weighted. If 0.667 gram of BaSO4was obtained, what was the morality of the H2SO4? (A) 0.00700 M (B) 0.0286 M (C) 0.0572 M (D) 1.43 M 20. Which statement about the electron configuration of electrons in the Cs atom is correct? 21. Those elements in which unpaired valence electrons are in atomic orbitals designated by l = 2 are described as 22. Which of the following species is smallest is size?
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23. Which atom has the lowest second ionization energy? (A) Mg (B) Na (C) K (D) Ar 24. What formula would be expected for a binary compound formed between strontium and nitrogen? 25. The formation of an ionic compound from its elements can be understood in terms of steps, each involving a certain energy input or output. Which energy step usually dominates all others in the formation of a stable ionic compound? 26. Which compound violates the simple octet rule for electron distribution around the central atom?
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  • Spring '08
  • rogers
  • Chemistry, pH, distilled water

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