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Unformatted text preview: AP chem.. OMalley Chapter 3 stoichiometry 4 Name: ____________________ Text: p 91 96 (3.6) (elemental analysis) S. OMalley 2011 ELEMENTAL ANALYSIS EX 0.1156 g C x H y N Z reacts with O 2 to give 0.1638 g CO 2 , 0.1676 g H 2 O , and N 2 . Find the empirical formula. C x H y N z + O 2 CO 2 + H 2 O + N 2 3.79 Cumene is a compound containing only carbon and hydrogen that is used in the production of acetone and phenol in the chemical industry. Combustion of 47.6 mg cumene produces some CO 2 and 42.8 mg water. The molar mass of cumene is between 115 and 125 g/mol. Determine the empirical and molecular formulas of cumene. Problems taken from Zumdahl, 7 th ed. HOMEWORK (CH 3 part 5) 3.71 There are two binary compounds of mercury and oxygen. Heating either of them results in the decomposition of the compound, with oxygen gas escaping into the atmosphere and a residue of pure mercury remaining. Heating 0.6498 g of one of the compounds leaves a residue of 0.6018 g. Heating 0.4172 g of the other remaining....
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