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General Chemistry Principles, Patterns, and Applications, 2011

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21. How many moles of CO 2 , H 2 O, <strong>and</strong> N 2 will be produced by combustion analysis of 0.0074 mol of aspartame?<br />

22. How many moles of CO 2 , H 2 O, N 2 , <strong>and</strong> SO 2 will be produced by combustion analysis of 0.0060 mol of penicillin<br />

G?<br />

1. Combustion of a 34.8 mg sample of benzaldehyde, which contains only carbon, hydrogen, <strong>and</strong> oxygen,<br />

produced 101 mg of CO 2 <strong>and</strong> 17.7 mg of H 2 O.<br />

a. What was the mass of carbon <strong>and</strong> hydrogen in the sample?<br />

b. Assuming that the original sample contained only carbon, hydrogen, <strong>and</strong> oxygen, what was the mass of<br />

oxygen in the sample?<br />

c. What was the mass percentage of oxygen in the sample?<br />

d. What is the empirical formula of benzaldehyde?<br />

e. The molar mass of benzaldehyde is 106.12 g/mol. What is its molecular formula?<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

219

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