Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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A researcher analyzed an unknown solid, extracted from the bark of spruce
trees, to determine its percentage composition. An 11.32 mg sample was burned in a combustion apparatus. The carbon dioxide (24.87 mg) and water (5.82 mg) were
collected and weighed.
a.From the results of this analysis calculate the percentage of composition of the
unknown solid.
b.Determine the empirical formula of the unknown solid.
c.Through mass spectrometry the molecular mass was found to be 420 g/mole.
What is the molecular formula?
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