REACTIONS 1. When the following equation C9H15S + O2→CO2+ H2O + SO2is balanced with the smallest possible set of integer coefficients (no fractions), the coefficient preceding CO2is 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, C2H5OH, to form CO2and H2O is balanced with lowest–integer coefficients, the coefficient for O2is 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 M2O. What is the atomic mass of the metal? 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 5. 1.00 g of a compound is combusted in oxygen and found to give 3.14 g of CO2and 1.29 g of H2O. 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 C6H. C. the compound contains C, H, and O and has the empirical formula of CH3O. D. the compound contains only C and H and has the empirical formula of CH2. E. None of the above is a true statement
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