Chemical reactions - REACTIONS 1. When the following...

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REACTIONS 1. When the following equation C 9 H 15 S + O 2 CO 2 + H 2 O + SO 2 is balanced with the smallest possible set of integer coefficients (no fractions), the coefficient preceding CO 2 is A. 9 B. 27 C. 36 D. 18 E. None of the above is correct 2. When the equation for the complete combustion of ethanol, C 2 H 5 OH, to form CO 2 and H 2 O is balanced with lowest– integer coefficients, the coefficient for O 2 is A. 7 B. 6 C. 5 D. 3 E. None of the above answers is correct 3. A 100.0 g sample of a metal M is burned in air to produce 103.7 g of its oxide with the formula M 2 O. What is the atomic mass of the metal? A. 73 amu B. 150 amu C. 216 amu D. 290 amu E. 370 amu 4. 4.31 g of a hydrocarbon is completely combusted in oxygen and found to yield 6.36 g of water. The empirical formula for the hydrocarbon is A. C 3 H 7 B. CH 4 C. C 7 H 4 D. C 21 H 4 E. CH 5. 1.00 g of a compound is combusted in oxygen and found to give 3.14 g of CO 2 and 1.29 g of H 2 O. From these data we can tell that A. the compound contains C, H, and some other element of unknown identity, so we can’t calculate the empirical formula. B. the compound contains only C and H and has the empirical formula of C 6 H. C. the compound contains C, H, and O and has the empirical formula of CH 3 O. D. the compound contains only C and H and has the empirical formula of CH 2 .
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This note was uploaded on 07/16/2011 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Spring '08 term at Pennsylvania State University, University Park.

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Chemical reactions - REACTIONS 1. When the following...

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